{"title":"All Products","description":"\u003cp\u003e\u003cspan\u003eBrowse all RenewSpark batteries, cells, and DIY parts in one place.\u003c\/span\u003e\u003c\/p\u003e","products":[{"product_id":"2s-8-4v-20a-bms-balance","title":"2S 20A BMS Protection Board w\/ Balance – 8.4V 18650 Li-ion","description":"\u003cdiv\u003e\n\u003ch2\u003e2S 8.4V 20A Lithium Battery BMS Protection Board with Balance\u003c\/h2\u003e\n\u003cp\u003eThis 2S 20A BMS (Battery Management System) board provides reliable protection for building or repairing lithium-ion battery packs. Designed for \u003cstrong\u003e2-cell (2S) packs\u003c\/strong\u003e with a nominal voltage of 7.4V and fully charged at 8.4V, it includes \u003cstrong\u003ebalanced charging\u003c\/strong\u003e for safer, longer-lasting performance.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eContinuous charge current: up to 10A\u003c\/li\u003e\n\u003cli\u003eMaximum discharge current: 20A\u003c\/li\u003e\n\u003cli\u003eBalanced charging function included\u003c\/li\u003e\n\u003cli\u003eProtection against overcharge, over-discharge, overcurrent, and short circuits\u003c\/li\u003e\n\u003cli\u003eCompact and lightweight design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWorks with lithium-ion cells such as \u003cstrong\u003e18650, 26650, and polymer lithium batteries\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eSupports resistive loads up to \u003cstrong\u003e168W\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eRecommended for applications under \u003cstrong\u003e25A starting current\u003c\/strong\u003e (e.g., small power tools, drills, LED packs, DIY projects)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eType: 2S (2-cell) lithium battery BMS\u003c\/li\u003e\n\u003cli\u003eNominal voltage: 7.4V\u003c\/li\u003e\n\u003cli\u003eFull charge voltage: 8.4V\u003c\/li\u003e\n\u003cli\u003eCharge current: 10A max\u003c\/li\u003e\n\u003cli\u003eDischarge current: 20A max\u003c\/li\u003e\n\u003cli\u003eBalance charging: Yes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePackage Includes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1 × 2S 20A BMS protection board with balance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImportant Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCells, wire and solder are not included.\u003c\/li\u003e\n\u003cli\u003eObserve correct polarity when wiring the balance leads — reversed connections will damage the board.\u003c\/li\u003e\n\u003cli\u003eDerate the current if the board is enclosed without airflow.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eShips fast from the USA. Shipping calculated at checkout.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFor more battery parts and rebuild supplies, just search \u003cstrong\u003eRenewSpark\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e—  \u003cbr\u003eDownload “RenewSpark Tools” on the iOS App Store — the toolbox I use for battery building.\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47180111151331,"sku":"BM101","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/2S20A7.4VBMS.webp?v=1756259936"},{"product_id":"enerkey-2s-30a-bms","title":"Enerkey 2S 30A 7.4V–8.4V Lithium Battery BMS Protection Board for 18650\/21700 Packs","description":"\u003cp\u003eThe Enerkey 2S 30A BMS (Battery Management System) is designed for 2-cell (2S) lithium-ion battery packs, offering reliable protection and performance. 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Peel, stick, and cut to size — clean insulation wherever you need it.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Fish paper (barley paper) — strong, flexible, high dielectric strength\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSelf-adhesive:\u003c\/strong\u003e peel-and-stick backing sticks firmly and resists slipping\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 200 mm (7.9 in) wide × 3 m (9.9 ft) long × 0.2 mm thick — cut to any size\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Green\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHeat resistant:\u003c\/strong\u003e suited to lithium packs, coils, and transformers\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMulti-purpose:\u003c\/strong\u003e wrap cells, insulate busbars, capacitors, transformers, and circuit boards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat Is Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1 roll — 200 mm × 3 m self-adhesive fish paper\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat Is Not Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBattery cells\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Parts and Resources\u003c\/strong\u003e\u003cbr\u003e\nFor pre-cut insulator rings, nickel, BMS boards, and more rebuild supplies, visit our shop \u003cstrong\u003eRenewSpark\u003c\/strong\u003e. We also offer the \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e app, built to help DIY builders and professionals with battery-building calculators and utilities.\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47181217792227,"sku":"MS101","price":17.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/fishpaper.jpg?v=1756775741"},{"product_id":"dewalt-dcb205-20v-battery-rebuild-kit","title":"DeWalt DCB205 20V Battery Rebuild Kit - 5S2P BMS, Nickel, Shell (No Cells)","description":"\u003cp style=\"color: #d35400; font-weight: bold;\"\u003e\nDeWalt DCB205 20V Battery Rebuild Kit – 5S2P BMS, Nickel, Shell, Hardware (No Cells)\n\u003c\/p\u003e\n\n\u003cp\u003e\nThis kit provides all the parts needed to rebuild a battery pack for \n\u003cstrong\u003eDeWalt DCB205 20V MAX tools\u003c\/strong\u003e (sold as 18V XR outside the US — same pack, same rail). Designed for experienced users who will install \nand manage their own lithium-ion cells (\u003cstrong\u003ecells not included\u003c\/strong\u003e).\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThis is a compatible replacement kit.\u003c\/strong\u003e It is independently manufactured and is not an original DeWalt-branded product.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDeWalt DCB205-compatible 20V battery shell \/ housing\u003c\/li\u003e\n  \u003cli\u003e5S BMS board with protection \u0026amp; balancing circuits, for a 10-cell 5S2P pack\u003c\/li\u003e\n  \u003cli\u003ePre-cut nickel strips and wiring set\u003c\/li\u003e\n  \u003cli\u003eHardware \u0026amp; connector leads\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eConfiguration: 5S2P layout (10 cells: 5 in series, 2 in parallel)\u003c\/li\u003e\n  \u003cli\u003eCell format: 18650\u003c\/li\u003e\n  \u003cli\u003eNominal Voltage: ~20V (tool-class standard)\u003c\/li\u003e\n  \u003cli\u003eFits DeWalt 20V MAX tools and compatible chargers\u003c\/li\u003e\n  \u003cli\u003eProtection Features: Over-charge, over-discharge, over-current, short-circuit, balancing functionality\u003c\/li\u003e\n  \u003cli\u003eFinal pack capacity depends entirely on the cells you install\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat Is Not Included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCells\u003c\/strong\u003e — you supply your own 18650 lithium-ion cells\u003c\/li\u003e\n  \u003cli\u003eCharger\u003c\/li\u003e\n  \u003cli\u003eSpot welder or assembly tools\u003c\/li\u003e\n  \u003cli\u003ePower tool\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThis listing \u003cstrong\u003edoes not include cells\u003c\/strong\u003e. You must supply your own compatible lithium-ion cells.\u003c\/li\u003e\n  \u003cli\u003eAssembly requires proper tools, knowledge of battery safety, correct wiring, and testing before use.\u003c\/li\u003e\n  \u003cli\u003eUse only matching cells in terms of type, capacity, brand, and charge level to ensure safety.\u003c\/li\u003e\n  \u003cli\u003ePlease review all product photos carefully before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\n\u003cstrong\u003eShipping \u0026amp; Safety:\u003c\/strong\u003e Ships without any batteries, so standard shipping applies. \nNo special hazardous materials (Hazmat) handling needed. If cells are added, then \nbattery transport regulations apply.\n\u003c\/p\u003e\n\n\u003ch4\u003eAdditional Parts and Resources\u003c\/h4\u003e\n\n\u003cp\u003eFor additional battery components, cells, connectors, BMS boards, nickel strips, tools, and supplies, visit \u003cstrong\u003eRenewSpark\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eFor helpful tools, calculators, technical information, and additional resources, download the \u003cstrong\u003eRenewSpark Tools app\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDeWalt is a trademark of its respective owner. This compatible product is independently manufactured and is not produced, sponsored, or endorsed by DeWalt.\u003c\/strong\u003e\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"1 Pack","offer_id":47256141988067,"sku":"KT101","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/FullSizeRender_2e26791b-b615-4071-9397-b75d1355179e.heic?v=1760319685"},{"product_id":"milwaukee-m18-10-cell-18650-rebuild-kit","title":"Milwaukee M18 18V Battery Rebuild Kit - 10-Cell 18650, 5S2P BMS (No Cells)","description":"\u003cp\u003e\u003cstrong\u003eProduct:\u003c\/strong\u003e Milwaukee M18 18V Battery Rebuild Kit – 5S2P, No Cells Included\u003c\/p\u003e\n\n\u003cp\u003eThis kit provides all the parts needed to rebuild a battery pack for \u003cstrong\u003eMilwaukee M18 18V tools\u003c\/strong\u003e using 18650 lithium-ion cells. Designed for experienced users who will install and manage their own cells. Batteries\/cells are not included.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThis is a compatible replacement kit.\u003c\/strong\u003e It is independently manufactured and is not an original Milwaukee-branded product.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eM18‑compatible battery shell \/ housing\u003c\/li\u003e\n\u003cli\u003e5S BMS board with protection \u0026amp; balancing circuits, for a 10-cell 5S2P pack\u003c\/li\u003e\n\u003cli\u003ePre‑cut nickel strips and wiring set\u003c\/li\u003e\n\u003cli\u003eHardware \u0026amp; connector leads\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eConfiguration: 5S2P layout (10 cells: 5 in series, 2 in parallel)\u003c\/li\u003e\n\u003cli\u003eCell format: 18650\u003c\/li\u003e\n\u003cli\u003eNominal Voltage: ~18V (tool‑class standard)\u003c\/li\u003e\n\u003cli\u003eFits Milwaukee M18 tools and compatible chargers\u003c\/li\u003e\n\u003cli\u003eProtection Features: Over‑charge, over‑discharge, over‑current, short‑circuit, balancing functionality\u003c\/li\u003e\n\u003cli\u003eFinal pack capacity depends entirely on the cells you install\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat Is Not Included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCells\u003c\/strong\u003e — you supply your own 18650 lithium-ion cells\u003c\/li\u003e\n\u003cli\u003eCharger\u003c\/li\u003e\n\u003cli\u003eSpot welder or assembly tools\u003c\/li\u003e\n\u003cli\u003ePower tool\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThis listing \u003cstrong\u003edoes not include cells\u003c\/strong\u003e. You must supply your own compatible lithium‑ion cells.\u003c\/li\u003e\n\u003cli\u003eAssembly requires proper tools, knowledge of battery safety, correct wiring, and testing before use.\u003c\/li\u003e\n\u003cli\u003eUse only matching cells in terms of type, capacity, brand, and charge level to ensure safety.\u003c\/li\u003e\n\u003cli\u003ePlease review all product photos carefully before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eShipping \u0026amp; Safety:\u003c\/strong\u003e Ships without any batteries, so standard shipping applies. No special hazardous materials (Hazmat) handling needed. If cells are added, then battery transport regulations apply.\u003c\/p\u003e\n\n\u003ch4\u003eAdditional Parts and Resources\u003c\/h4\u003e\n\n\u003cp\u003eFor additional battery components, cells, connectors, BMS boards, nickel strips, tools, and supplies, visit \u003cstrong\u003eRenewSpark\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eFor helpful tools, calculators, technical information, and additional resources, download the \u003cstrong\u003eRenewSpark Tools app\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMilwaukee and M18 are trademarks of their respective owner. This compatible product is independently manufactured and is not produced, sponsored, or endorsed by Milwaukee.\u003c\/strong\u003e\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47181217038563,"sku":"KT102","price":21.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/m18.jpg?v=1757121508"},{"product_id":"bosch-18v-battery-rebuild-kit","title":"Bosch-Style 18V 5S2P Battery Rebuild Kit - 5S BMS, Nickel, Shell (No Cells)","description":"\u003cp\u003e\u003cstrong\u003eBosch-Style 18V Battery Rebuild Kit – 5S2P, 5S BMS, Nickel, Shell \u0026amp; Hardware (No Cells)\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eRebuild your Bosch 18 V lithium-ion battery pack with this complete DIY kit. 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See our Terms of Service for full details.\u003c\/p\u003e","brand":"Samsung","offers":[{"title":"1 cell","offer_id":47181218611427,"sku":"CE107","price":4.99,"currency_code":"USD","in_stock":false},{"title":"2 cells","offer_id":49502980178147,"sku":"CE104","price":9.49,"currency_code":"USD","in_stock":false},{"title":"4 cells","offer_id":49502980210915,"sku":"CE105","price":17.99,"currency_code":"USD","in_stock":false},{"title":"8 cells","offer_id":49502980243683,"sku":"CE106","price":33.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/FEC0614C-CA03-4E4D-926A-BCFE7392ADBF.jpg?v=1758495441"},{"product_id":"molicel-p42a-21700-cell","title":"Molicel P42A – 21700 3.6V 4200mAh 45A Li-ion Cell","description":"\u003cp\u003eAuthentic Molicel P42A 21700 lithium-ion cells — a high-capacity, high-drain cell built for demanding applications. 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Pre‑attached nickel strips make spot‑welding quick and clean for DIY power banks and compact battery projects.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e 1S (single cell, 3.7V nominal)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated current:\u003c\/strong\u003e 3A continuous\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtections:\u003c\/strong\u003e Over‑charge, over‑discharge, over‑current, short‑circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm factor:\u003c\/strong\u003e Ultra‑slim PCB with extended nickel strips\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse cases:\u003c\/strong\u003e DIY power banks, flashlights, compact single‑cell projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eTip:\u003c\/em\u003e Always verify polarity before welding. Use quality 18650 cells for best performance.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eBacked by RenewSpark 30‑day money‑back guarantee.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e—  \u003cbr\u003eDownload “RenewSpark Tools” on the iOS App Store — the toolbox I use for battery building.\u003cbr\u003e\u003c\/em\u003e\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47181213171939,"sku":"BM103","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/FullSizeRender_1ccb5c63-15b1-4f5e-9140-44ec28660ff7.heic?v=1760717181"},{"product_id":"hilti-b22-6s-rebuild-kit","title":"Hilti-Style B22 21.6V Battery Rebuild Kit - 6S BMS, Nickel, Shell (No Cells)","description":"\u003cp\u003e\u003cstrong\u003eHilti-Style B22 21.6V Battery Rebuild Kit – 6S BMS, Nickel, Shell \u0026amp; Hardware (No Cells)\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eRebuild your Hilti B22 21.6 V lithium-ion battery pack with this complete DIY kit. Designed for \u003cstrong\u003e12-cell (6S2P)\u003c\/strong\u003e configurations using 18650 cells, it includes a matched \u003cstrong\u003e6S BMS\u003c\/strong\u003e, precision-cut pure nickel for reliable spot welds, a durable housing shell, and all required hardware — everything you need \u003cem\u003eexcept the cells\u003c\/em\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThis is a compatible replacement kit.\u003c\/strong\u003e It is independently manufactured and is not an original Hilti-branded product.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete kit (no cells):\u003c\/strong\u003e 6S BMS, pure nickel, housing shell, screws \u0026amp; hardware\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFits Hilti B22 21.6 V-class tools\u003c\/strong\u003e and compatible chargers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePure nickel bus:\u003c\/strong\u003e Low resistance for clean welds and reliable conductivity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDIY-friendly:\u003c\/strong\u003e Ideal for experienced rebuilders and repair technicians\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShips from California\u003c\/strong\u003e for fast U.S. delivery\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eWhat’s Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e1 × \u003cstrong\u003e6S BMS\u003c\/strong\u003e (21.6 V-class lithium-ion)\u003c\/li\u003e\n\u003cli\u003ePre-cut \u003cstrong\u003epure nickel plates\u003c\/strong\u003e for 6S2P layout\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHilti-compatible B22 shell\u003c\/strong\u003e (top \u0026amp; bottom)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardware set\u003c\/strong\u003e – screws and mounting parts\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eWhat Is Not Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCells\u003c\/strong\u003e — you supply your own twelve 18650 lithium-ion cells\u003c\/li\u003e\n\u003cli\u003eCharger\u003c\/li\u003e\n\u003cli\u003eSpot welder or assembly tools\u003c\/li\u003e\n\u003cli\u003ePower tool\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eBattery Capacity\u003c\/h4\u003e\n\u003cp\u003eBecause this is a \u003cstrong\u003e6S2P\u003c\/strong\u003e configuration, two cells are paralleled at each of the six series positions, so the finished pack capacity is approximately double the rated capacity of a single cell. For example, twelve matched 3,000mAh cells produce a pack of approximately 6.0Ah (about 130Wh at 21.6 V nominal). Actual capacity, output current, and runtime depend entirely on the cells selected and the quality of the assembly.\u003c\/p\u003e\n\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eFor \u003cstrong\u003eHilti B22 21.6 V-class packs\u003c\/strong\u003e using twelve 18650 cells (6S2P layout)\u003c\/li\u003e\n\u003cli\u003ePlease review all product photos carefully before ordering\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eNotes \u0026amp; Safety\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo cells included.\u003c\/strong\u003e You provide the twelve 18650 cells.\u003c\/li\u003e\n\u003cli\u003eUse twelve cells of the same make, model, and state of charge. Mismatched cells in a parallel group can cause circulating current and uneven wear.\u003c\/li\u003e\n\u003cli\u003eRequires spot welder and basic lithium-ion handling experience.\u003c\/li\u003e\n\u003cli\u003eVerify polarity and insulation before assembly. Incorrect wiring can cause damage or injury.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eAdditional Parts and Resources\u003c\/h4\u003e\n\n\u003cp\u003eFor additional battery components, cells, connectors, BMS boards, nickel strips, tools, and supplies, visit \u003cstrong\u003eRenewSpark\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eFor helpful tools, calculators, technical information, and additional resources, download the \u003cstrong\u003eRenewSpark Tools app\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHilti and B22 are trademarks of their respective owner. This compatible product is independently manufactured and is not produced, sponsored, or endorsed by Hilti.\u003c\/strong\u003e\u003c\/p\u003e\n","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47181216612579,"sku":"KT105","price":53.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/FullSizeRender_5e6d7db8-de85-4ea6-86ea-cbb2db20a291.heic?v=1760928716"},{"product_id":"ryobi-18v-battery-rebuild-kit","title":"Ryobi 18V Battery Rebuild Kit - 5S2P, 5S BMS, Nickel, Shell (No Cells)","description":"\u003cp\u003e\u003cstrong\u003eProduct:\u003c\/strong\u003e Ryobi 18V 10-Cell Battery Rebuild Kit – \u003cem\u003eNo Cells Included\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis kit provides all the parts needed to rebuild a battery pack for \u003cstrong\u003eRyobi 18V ONE+ tools\u003c\/strong\u003e. Designed for experienced users who will install and manage their own lithium-ion cells (cells not included).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThis is a compatible replacement kit.\u003c\/strong\u003e It is independently manufactured and is not an original Ryobi-branded product.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIncluded Components:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eRyobi-compatible battery shell \/ housing\u003c\/li\u003e\n\u003cli\u003e5S BMS board with protection \u0026amp; balancing circuits, for a 10-cell 5S2P pack\u003c\/li\u003e\n\u003cli\u003ePre-cut nickel strips and wiring set\u003c\/li\u003e\n\u003cli\u003eHardware \u0026amp; connector leads\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eConfiguration: \u003cstrong\u003e5S2P\u003c\/strong\u003e layout (10 cells: 5 in series, 2 in parallel)\u003c\/li\u003e\n\u003cli\u003eCell format: 18650\u003c\/li\u003e\n\u003cli\u003eNominal Voltage: ~\u003cstrong\u003e18V\u003c\/strong\u003e (tool-class standard)\u003c\/li\u003e\n\u003cli\u003eFits Ryobi 18V ONE+ tools and compatible chargers\u003c\/li\u003e\n\u003cli\u003eProtection Features: Over-charge, over-discharge, over-current, short-circuit, and cell-balancing functionality\u003c\/li\u003e\n\u003cli\u003eFinal pack capacity depends entirely on the cells you install\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat Is Not Included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCells\u003c\/strong\u003e — you supply your own 18650 lithium-ion cells\u003c\/li\u003e\n\u003cli\u003eCharger\u003c\/li\u003e\n\u003cli\u003eSpot welder or assembly tools\u003c\/li\u003e\n\u003cli\u003ePower tool\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThis listing \u003cstrong\u003edoes not include cells\u003c\/strong\u003e. You must supply your own compatible 18650 lithium-ion cells.\u003c\/li\u003e\n\u003cli\u003eAssembly requires proper tools, knowledge of battery safety, correct wiring, and testing before use.\u003c\/li\u003e\n\u003cli\u003eUse only \u003cstrong\u003ematching cells\u003c\/strong\u003e (type, capacity, brand, and charge level) to ensure safety and pack longevity.\u003c\/li\u003e\n\u003cli\u003ePlease review all product photos carefully before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eShipping \u0026amp; Safety:\u003c\/strong\u003e Ships without any batteries, so standard shipping applies. No Hazmat handling needed. If cells are added after purchase, follow all applicable battery transport regulations.\u003c\/p\u003e\n\n\u003ch4\u003eAdditional Parts and Resources\u003c\/h4\u003e\n\n\u003cp\u003eFor additional battery components, cells, connectors, BMS boards, nickel strips, tools, and supplies, visit \u003cstrong\u003eRenewSpark\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eFor helpful tools, calculators, technical information, and additional resources, download the \u003cstrong\u003eRenewSpark Tools app\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eRyobi is a trademark of its respective owner. This compatible product is independently manufactured and is not produced, sponsored, or endorsed by Ryobi.\u003c\/strong\u003e\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47181218349283,"sku":"KT106","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/B00DD7C2-5CBC-49B0-88B9-114C977098BE.png?v=1758427658"},{"product_id":"18650-mini-power-bank-kit-keychain","title":"DIY 18650 Mini Power Bank Kit – 2-Cell Pocket Charger with Keychain \u0026 USB Output (No Cells)","description":"\u003cdiv style=\"font-family: Arial, sans-serif; line-height: 1.6;\"\u003e\n\u003ch2\u003eDIY 18650 Mini Power Bank Kit (No Cells Included)\u003c\/h2\u003e\n\u003cp\u003eBuild your own portable 2-cell power bank with keychain convenience. Ideal for phones, flashlights, or small USB gadgets—perfect for on-the-go DIY power solutions.\u003c\/p\u003e\n\u003ch3\u003e🔋 Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHolds \u003cstrong\u003e2× 18650 Li-ion cells\u003c\/strong\u003e (not included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSB-A output (5 V)\u003c\/strong\u003e for charging phones and accessories\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicro-USB input (5 V)\u003c\/strong\u003e for recharging\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLED indicator\u003c\/strong\u003e shows charging status\u003c\/li\u003e\n\u003cli\u003eBuilt-in \u003cstrong\u003eBMS protection\u003c\/strong\u003e: over-charge, over-discharge, short-circuit safety\u003c\/li\u003e\n\u003cli\u003eCompact \u003cstrong\u003eABS housing\u003c\/strong\u003e with keychain attachment for everyday carry\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e⚙️ Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInput:\u003c\/strong\u003e Micro-USB 5 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutput:\u003c\/strong\u003e USB-A 5 V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Cells:\u003c\/strong\u003e 2× 18650 Li-ion (flat-top preferred)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e ≈ 95 × 35 × 25 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.20 lb (0.09 kg)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e🧰 What's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1× Power bank housing with pre-installed BMS and ports\u003c\/li\u003e\n\u003cli\u003e1× Keychain loop and screw set\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size: 12px; color: #555;\"\u003eSmall note: cells and wires are not included. You can find compatible 18650 cells on RenewSpark.\u003c\/p\u003e\n\u003cp style=\"font-size: 12px; color: #555;\"\u003e—  \u003cbr\u003eDownload “RenewSpark Tools” on the iOS App Store — the toolbox I use for battery building.\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"RenewSpark","offers":[{"title":"Green","offer_id":47193299124451,"sku":"PB101","price":4.2,"currency_code":"USD","in_stock":false},{"title":"Purple","offer_id":47193299157219,"sku":"PB102","price":4.2,"currency_code":"USD","in_stock":true},{"title":"Yellow","offer_id":47193299189987,"sku":"PB103","price":4.2,"currency_code":"USD","in_stock":true},{"title":"Blue","offer_id":47193299222755,"sku":"PB104","price":4.2,"currency_code":"USD","in_stock":true},{"title":"White","offer_id":47193299255523,"sku":"PB105","price":4.2,"currency_code":"USD","in_stock":true},{"title":"Black","offer_id":47193299288291,"sku":"PB106","price":4.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/FullSizeRender_08ccb951-f43d-4086-b95a-b7f4abcfee93.heic?v=1758500936"},{"product_id":"nickel-strips-dewalt-20v-5ah","title":"Pre-Cut Nickel Strips for DeWalt 20V MAX 5Ah Battery Pack","description":"\u003cp\u003eBuild or rebuild your DeWalt 20V MAX 5Ah lithium-ion battery packs with ease using these \u003cstrong\u003epre-cut nickel strips\u003c\/strong\u003e. Designed and sized to fit perfectly inside OEM DeWalt 20V MAX 5Ah battery cases, these strips eliminate the hassle of cutting rolls and ensure a clean, consistent connection every time.\u003c\/p\u003e\n\u003c!-- 📽️ Product Demo Video --\u003e\n\u003cdiv style=\"text-align: center; margin: 20px 0;\"\u003e\u003ciframe width=\"100%\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/T4oftBXTIDQ\" title=\"Pre-Cut Nickel Strips for DeWalt 20V 5Ah Battery Packs | RenewSpark\" style=\"max-width: 560px; border-radius: 10px;\"\u003e\n  \u003c\/iframe\u003e\u003c\/div\u003e\n\u003cul\u003e\n\u003cli\u003eCompatibility: DeWalt 20V MAX 5Ah battery packs\u003c\/li\u003e\n\u003cli\u003eMaterial: Pure nickel (not nickel-plated)\u003c\/li\u003e\n\u003cli\u003ePre-cut to OEM length – ready for spot welding\u003c\/li\u003e\n\u003cli\u003eSize: 0.15mm (industry standard thickness)\u003c\/li\u003e\n\u003cli\u003eHigh conductivity \u0026amp; corrosion resistant\u003c\/li\u003e\n\u003cli\u003ePerfect fit for 10-cell, 18650 configuration packs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e⚡ \u003cem\u003eThese are the same nickel strips we use in our professional rebuild service. Save time, reduce waste, and get consistent welds with every pack.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e—  \u003cbr\u003eDownload “RenewSpark Tools” on the iOS App Store — the toolbox I use for battery building.\u003cbr\u003e\u003c\/em\u003e\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47229394026723,"sku":"PC102","price":10.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/pre-cut-nickel-strips-for-dewalt-20v-max-5ah-battery-pack-strip-909.png?v=1760745660"},{"product_id":"pure-nickel-strips-0-2x10x100mm-50pcs","title":"50× Pure Nickel Strips 0.2×10×100 mm – Pre-Cut for Battery Pack Spot Welding","description":"\u003cp\u003e\u003cstrong\u003eProduct:\u003c\/strong\u003e 50× Pre-Cut Pure Nickel Strips – 0.2×10×100 mm\u003c\/p\u003e\n\u003cp\u003eThese high-quality nickel strips are designed for building lithium-ion battery packs, ideal for spot welding applications in 18650 and 21700 packs, RC, robotics, DIY electronics, and custom projects.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eMaterial: 99.6% Pure Nickel (non-plated)\u003c\/li\u003e\n\u003cli\u003eDimensions: 0.2mm thickness × 10mm width × 100 mm length\u003c\/li\u003e\n\u003cli\u003eQuantity: 50 pre-cut strips\u003c\/li\u003e\n\u003cli\u003eCompatible with spot welding and soldering tools\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh conductivity and low resistance\u003c\/li\u003e\n\u003cli\u003eCorrosion-resistant and durable\u003c\/li\u003e\n\u003cli\u003eReady to use – no cutting required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eApplications:\u003c\/strong\u003e 18650 and 21700 lithium battery packs, e-bike and power tool packs, flashlight rebuilds, and more.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShipping:\u003c\/strong\u003e Ships from the U.S.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote:\u003c\/em\u003e Always use proper welding tools and follow safety procedures when assembling battery packs.\u003c\/p\u003e\n\u003cp\u003e—  \u003cbr\u003eDownload “RenewSpark Tools” on the iOS App Store — the toolbox I use for battery building.\u003cbr\u003e\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47240011120867,"sku":"PC106","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/IMG-2290.jpg?v=1759695946"},{"product_id":"18650-mini-tube-power-bank-kit","title":"DIY Mini Tube Power Bank Kit – USB Charger Stick (No Cell Included)","description":"\u003cdiv style=\"font-family: Arial, sans-serif; line-height: 1.6; font-size: 15px; max-width: 800px; margin: auto;\"\u003e\n\u003ch2\u003eDIY Mini Tube Power Bank Kit – USB Charger Stick (No Cell Included)\u003c\/h2\u003e\n\u003cp\u003eAssemble your own compact USB power bank using a single \u003cstrong\u003e18650 Li-ion cell\u003c\/strong\u003e (not included). Great for small gadgets, LED lights, or emergency phone charging. Easy to assemble and fun for DIY enthusiasts.\u003c\/p\u003e\n\u003ch3\u003e⚡ Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHolds 1× \u003cstrong\u003e18650 Li-ion cell\u003c\/strong\u003e (battery not included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSB-A output (5V)\u003c\/strong\u003e for charging phones or accessories\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicro-USB input (5V)\u003c\/strong\u003e for recharging the tube\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated BMS protection\u003c\/strong\u003e – overcharge, over-discharge, and short-circuit safety\u003c\/li\u003e\n\u003cli\u003eDurable \u003cstrong\u003ealuminum\/ABS tube housing\u003c\/strong\u003e in multiple colors\u003c\/li\u003e\n\u003cli\u003eLightweight and pocket-sized design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e📦 Package Includes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1× Power Bank Tube Shell (color of your choice)\u003c\/li\u003e\n\u003cli\u003e1× Micro-USB charging board\u003c\/li\u003e\n\u003cli\u003e1× End cap and internal spring\u003c\/li\u003e\n\u003cli\u003e\u003cem\u003eNote: 18650 battery not included\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin-top: 10px; font-size: 14px;\"\u003e🔋 Ideal for hobby projects, DIY makers, and anyone who wants a customizable portable charger solution.\u003c\/p\u003e\n\u003cp style=\"color: #555; font-size: 13px; margin-top: 15px;\"\u003e\u003cstrong\u003eRenewSpark Guarantee:\u003c\/strong\u003e All products are inspected before shipping. If you have any questions, contact us — we’re happy to help.\u003c\/p\u003e\n\u003cp style=\"color: #555; font-size: 13px; margin-top: 15px;\"\u003e—  \u003cbr\u003eDownload “RenewSpark Tools” on the iOS App Store — the toolbox I use for battery building.\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"RenewSpark","offers":[{"title":"Black","offer_id":47244245205219,"sku":"PB107","price":3.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/3097EC30-4B63-4A74-B5F6-8987B1363067.jpg?v=1758141475"},{"product_id":"18650-power-bank-kit-pd-wireless","title":"DIY 18650 Power Bank Kit – USB-C PD + QC3.0, Wireless Charging \u0026 LCD Display (No Cells)","description":"\u003cdiv style=\"font-family: Arial, sans-serif; line-height: 1.6;\"\u003e\n\u003ch2\u003eDIY 18650 Power Bank Kit (No Cells Included)\u003c\/h2\u003e\n\u003cp\u003eBuild your own high-performance power bank featuring fast USB-C PD charging, QC3.0 outputs, and a wireless charging pad. Ideal for DIY enthusiasts who prefer control over battery quality and capacity.\u003c\/p\u003e\n\u003ch3\u003e🔋 Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHolds \u003cstrong\u003e4× 18650 Li-ion cells\u003c\/strong\u003e (not included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSB-C PD\u003c\/strong\u003e input\/output + \u003cstrong\u003eDual USB-A QC3.0\u003c\/strong\u003e ports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10 W Qi Wireless Charging\u003c\/strong\u003e pad integrated on top surface\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital LCD display\u003c\/strong\u003e showing voltage, percentage, and charging status\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMS protection\u003c\/strong\u003e: over-charge, over-discharge, short-circuit, and thermal protection\u003c\/li\u003e\n\u003cli\u003eDurable \u003cstrong\u003eABS housing\u003c\/strong\u003e with textured surface and modern design\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e⚙️ Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInputs:\u003c\/strong\u003e USB-C PD \/ Micro-USB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutputs:\u003c\/strong\u003e 2× USB-A (QC3.0) + USB-C PD\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWireless Charging:\u003c\/strong\u003e 10 W Qi-compatible\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e Digital LCD voltage \u0026amp; capacity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Cells:\u003c\/strong\u003e 18650 Li-ion (flat-top preferred)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.48 lb (0.22 kg)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e🧰 What's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1× Power bank housing with pre-installed BMS, ports, LCD display, and wireless pad\u003c\/li\u003e\n\u003cli\u003e1× Screw set for assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size: 12px; color: #555;\"\u003eSmall note: cells and wires are not included. You can find compatible 18650 cells on RenewSpark.\u003c\/p\u003e\n\u003cp style=\"font-size: 12px; color: #555;\"\u003e—  \u003cbr\u003eDownload “RenewSpark Tools” on the iOS App Store — the toolbox I use for battery building.\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47244550144227,"sku":"PB108","price":11.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/FullSizeRender_8eef2225-76e9-4c11-8fa1-e9842f288933.jpg?v=1757089490"},{"product_id":"18650-power-bank-kit-qc-lcd","title":"DIY 18650 Power Bank Kit – Dual USB QC Fast Charging + LCD Display (No Cells)","description":"\u003cdiv style=\"font-family: Arial, sans-serif; line-height: 1.6;\"\u003e\n\u003ch2\u003eDIY 18650 Power Bank Kit (No Cells Included)\u003c\/h2\u003e\n\u003cp\u003eBuild your own high-quality portable power bank with fast charging and real-time LCD display. Perfect for DIY enthusiasts who want full control over performance, capacity, and cell quality.\u003c\/p\u003e\n\u003ch3\u003e🔋 Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHolds \u003cstrong\u003e4× 18650 Li-ion cells\u003c\/strong\u003e (not included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual USB-A output ports\u003c\/strong\u003e with QC Fast Charging support\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSB-C\u003c\/strong\u003e and \u003cstrong\u003eMicro-USB\u003c\/strong\u003e input options\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital LCD screen\u003c\/strong\u003e shows voltage, percentage, and charging status\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMS protection\u003c\/strong\u003e: over-charge, over-discharge, short-circuit, and temperature\u003c\/li\u003e\n\u003cli\u003eDurable \u003cstrong\u003eABS plastic housing\u003c\/strong\u003e with sleek black top panel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e⚙️ Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInputs:\u003c\/strong\u003e Micro-USB, USB-C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutputs:\u003c\/strong\u003e 2× USB-A (QC Fast Charging)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e LCD digital screen (shows power level)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Cells:\u003c\/strong\u003e 18650 Li-ion (flat-top preferred)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.45 lb (0.20 kg)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e🧰 What's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1× Power bank housing with pre-installed BMS, ports, and LCD display\u003c\/li\u003e\n\u003cli\u003e1× Screw set for assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size: 12px; color: #555;\"\u003eSmall note: cells and wires are not included. You can find compatible 18650 cells on RenewSpark.\u003c\/p\u003e\n\u003cp style=\"font-size: 12px; color: #555;\"\u003e—  \u003cbr\u003eDownload “RenewSpark Tools” on the iOS App Store — the toolbox I use for battery building.\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"RenewSpark","offers":[{"title":"White","offer_id":47244557713635,"sku":"PB109","price":10.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/12-000mah-portable-power-bank-dual-usb-qc-fast-charging-lcd-display-white-477.webp?v=1760677867"},{"product_id":"21700-power-bank-kit-usb-c","title":"DIY 21700 Power Bank Kit – Dual USB + USB-C + Optional Wireless Charging (No Cells)","description":"\u003cdiv style=\"font-family: Arial, sans-serif; line-height: 1.6;\"\u003e\n\u003ch2\u003eDIY 21700 Power Bank Kit (No Cells Included)\u003c\/h2\u003e\n\u003cp\u003eBuild your own high-performance portable power bank using this versatile DIY kit. Designed for makers, hobbyists, and tech enthusiasts who prefer full control over battery quality and performance.\u003c\/p\u003e\n\u003ch3\u003e🔋 Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHolds \u003cstrong\u003e4× 21700 Li-ion cells\u003c\/strong\u003e (not included)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual USB-A\u003c\/strong\u003e output ports + \u003cstrong\u003eUSB-C\u003c\/strong\u003e input\/output\u003c\/li\u003e\n\u003cli\u003eOptional \u003cstrong\u003eQi Wireless Charging (10 W)\u003c\/strong\u003e on premium model\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBMS protection\u003c\/strong\u003e: over-charge, over-discharge, and short-circuit safety\u003c\/li\u003e\n\u003cli\u003eBuilt-in \u003cstrong\u003eLED flashlight\u003c\/strong\u003e and battery-level indicators\u003c\/li\u003e\n\u003cli\u003eDurable \u003cstrong\u003eABS plastic enclosure\u003c\/strong\u003e with copper-accent trim\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e⚙️ Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInputs:\u003c\/strong\u003e Micro-USB, Type-C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutputs:\u003c\/strong\u003e 2× USB-A + Type-C\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWireless Charging:\u003c\/strong\u003e 10 W (optional model only)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Cells:\u003c\/strong\u003e 21700 Li-ion (flat-top preferred)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.50 lb (0.23 kg)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e🧰 What's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1× Power bank housing with pre-installed BMS and ports\u003c\/li\u003e\n\u003cli\u003e1× Screw set for assembly\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size: 12px; color: #555;\"\u003eSmall note: cells and wires are not included. You can find compatible 21700 cells on RenewSpark.\u003c\/p\u003e\n\u003cp style=\"font-size: 12px; color: #555;\"\u003e—  \u003cbr\u003eDownload “RenewSpark Tools” on the iOS App Store — the toolbox I use for battery building.\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"RenewSpark","offers":[{"title":"Dual USB + USB-C (No Cells)","offer_id":47244610928867,"sku":"PB110","price":16.99,"currency_code":"USD","in_stock":true},{"title":"Dual USB + USB-C + Wireless","offer_id":47244610961635,"sku":"PB111","price":20.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/25-000mah-high-capacity-power-bank-dual-usb-wireless-charging-removable-21700-cells-196.png?v=1760745896"},{"product_id":"18650-fish-paper-insulator-rings-50-pack","title":"50 PCS 18650 Fish-Paper Insulator Rings – Pure Fiber","description":"\u003ch2\u003e50 PCS 18650 Fish-Paper Insulator Rings – Pure Fiber\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eA 50-pack of self-adhesive fish-paper insulator rings for the positive end of 18650 cells — peel, stick, and prevent top-cap shorts during pack assembly. No cutting, no mess.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Pure fiber (fish paper) — high dielectric strength, heat resistant\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle-side adhesive:\u003c\/strong\u003e peel-and-stick backing holds position under weld pressure\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Standard 18650 lithium-ion cells\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Green\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 50 rings per pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat Is Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e50 × 18650 self-adhesive fish-paper insulator rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat Is Not Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBattery cells\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGood to Know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIsolates the positive terminal ring to prevent shorts against the wrap or busbar.\u003c\/li\u003e\n  \u003cli\u003eShips flat in a lightweight envelope — multiple packs may ship separately.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Parts and Resources\u003c\/strong\u003e\u003cbr\u003e\nFor nickel by the roll, pre-cut busbars, BMS boards, and more rebuild supplies, visit our shop \u003cstrong\u003eRenewSpark\u003c\/strong\u003e. We also offer the \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e app, built to help DIY builders and professionals with battery-building calculators and utilities.\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47286401171683,"sku":"IR101","price":3.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/IMG-8135.png?v=1785499572"},{"product_id":"21700-fish-paper-rings-50-pack","title":"50 PCS 21700 Fish-Paper Insulator Rings – Pure Fiber","description":"\u003ch2\u003e50 PCS 21700 Fish-Paper Insulator Rings – Pure Fiber\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eA 50-pack of self-adhesive fish-paper insulator rings for the positive end of 21700 cells — peel, stick, and prevent top-cap shorts during pack assembly. No cutting, no mess.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Pure fiber (fish paper) — high dielectric strength, heat resistant\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle-side adhesive:\u003c\/strong\u003e peel-and-stick backing holds position under weld pressure\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFits:\u003c\/strong\u003e Standard 21700 lithium-ion cells\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Green\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 50 rings per pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat Is Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e50 × 21700 self-adhesive fish-paper insulator rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat Is Not Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBattery cells\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGood to Know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eIsolates the positive terminal ring to prevent shorts against the wrap or busbar.\u003c\/li\u003e\n  \u003cli\u003eShips flat in a lightweight envelope — multiple packs may ship separately.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Parts and Resources\u003c\/strong\u003e\u003cbr\u003e\nFor nickel by the roll, pre-cut busbars, BMS boards, and more rebuild supplies, visit our shop \u003cstrong\u003eRenewSpark\u003c\/strong\u003e. We also offer the \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e app, built to help DIY builders and professionals with battery-building calculators and utilities.\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47293162553571,"sku":"IR102","price":3.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/IMG-8138.png?v=1785499966"},{"product_id":"dc-5-5x2-1mm-pigtail-pair","title":"DC 5.5×2.1mm Male Female Pigtail Cable 12V CCTV Security Camera LED Strip","description":"\u003ch2\u003eDC 5.5 × 2.1 mm Male \u0026amp; Female Pigtail Power Cable (Pairs)\u003c\/h2\u003e\n\u003cp\u003eHigh-quality 5.5×2.1 mm DC barrel connector pairs — each set includes \u003cstrong\u003eone male\u003c\/strong\u003e and \u003cstrong\u003eone female\u003c\/strong\u003e pigtail with pre-soldered leads. 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We also offer the \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e app, built to help DIY builders and professionals with calculators and utilities for battery rebuilding projects.\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"25 ft","offer_id":47335809810659,"sku":"NR101","price":16.99,"currency_code":"USD","in_stock":true},{"title":"50 ft","offer_id":47335809843427,"sku":"NR102","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/0-2-mm-pure-nickel-strip-roll-10-ft-25-50-width-for-battery-pack-spot-welding-997.png?v=1760745384"},{"product_id":"xt60-female-pigtail-14awg","title":"XT60 Female Connector Pigtail – Pre-Wired 14 AWG Silicone Leads (5 \/ 10 \/ 20 Pack)","description":"\u003cp\u003e\u003cstrong\u003eXT60 Female Connector Pigtails — Pre-Wired with 14 AWG Silicone Leads\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003ePre-soldered XT60 female connectors on 14 AWG silicone wire — the battery-side lead for RC LiPo packs, Li-ion battery rebuilds, e-bikes, drones, and DIY power builds. 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We also offer the \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e app, built to help DIY builders and professionals with calculators and utilities for battery rebuilding projects.\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"5-Pack","offer_id":47337560277219,"sku":"CN101","price":12.99,"currency_code":"USD","in_stock":true},{"title":"10-Pack","offer_id":47337560309987,"sku":"CN102","price":23.99,"currency_code":"USD","in_stock":true},{"title":"20-Pack","offer_id":47337560342755,"sku":"CN103","price":46.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/IMG-7816.png?v=1784506730"},{"product_id":"xt30-female-pigtail-18awg","title":"XT30 Female Connector Pigtail – Pre-Wired 18 AWG Silicone Leads (5\/10\/20 Pack)","description":"\u003cp\u003e\u003cstrong\u003eXT30 Female Connector Pigtails — Pre-Wired with 18 AWG Silicone Leads\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003ePre-soldered XT30 female connectors on 18 AWG silicone wire — the compact battery-side lead for FPV drones, small RC LiPo packs, Li-ion battery rebuilds, robotics, and DIY power builds. Following standard RC polarity, the \u003cstrong\u003efemale connector is the battery side\u003c\/strong\u003e, so these drop straight onto your pack with no connector soldering required.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's in Each Pack\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eXT30 \u003cstrong\u003efemale\u003c\/strong\u003e connectors, each pre-soldered to 18 AWG (10–15 cm) red \u0026amp; black silicone leads\u003c\/li\u003e\n  \u003cli\u003eFemale connectors only — no male connectors included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e XT30 female pigtail (pre-wired)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRated current:\u003c\/strong\u003e 30 A continuous \/ 60 A peak\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContacts:\u003c\/strong\u003e Gold-plated copper\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHousing:\u003c\/strong\u003e Heat-resistant nylon (yellow)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWire:\u003c\/strong\u003e 18 AWG soft silicone, 10–15 cm, tinned ends\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Brand new\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Uses\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFPV quads and small RC LiPo battery packs (battery-side lead, per RC convention)\u003c\/li\u003e\n  \u003cli\u003eLi-ion pack rebuilds and compact power projects\u003c\/li\u003e\n  \u003cli\u003eRobotics, chargers, power distribution\u003c\/li\u003e\n  \u003cli\u003eReplacement battery-side leads\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNeed the mating connector?\u003c\/strong\u003e We also sell bare XT30 male + female pairs separately in our shop.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAvailable Packs\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e5-Pack, 10-Pack, and 20-Pack — select above\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eShips from California — fast U.S. delivery.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAdditional Parts and Resources\u003c\/strong\u003e\u003cbr\u003e\nFor more battery rebuild supplies, cells, BMS boards, nickel strip, and connectors, visit our shop \u003cstrong\u003eRenewSpark\u003c\/strong\u003e. We also offer the \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e app, built to help DIY builders and professionals with calculators and utilities for battery rebuilding projects.\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"5-Pack","offer_id":47337592193251,"sku":"CN104","price":8.99,"currency_code":"USD","in_stock":true},{"title":"10-Pack","offer_id":47337592226019,"sku":"CN105","price":16.99,"currency_code":"USD","in_stock":true},{"title":"20-Pack","offer_id":47337592258787,"sku":"CN106","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/IMG-7811.png?v=1784506028"},{"product_id":"nickel-strip-set-m18-5ah-6ah","title":"Pre-Cut Pure Nickel Strip Set – Milwaukee M18 5.0Ah 6.0Ah 18650 – 6 Pcs","description":"\u003ch2\u003ePre-Cut Pure Nickel Strip Set for Milwaukee M18 5.0Ah \/ 6.0Ah (6 Pieces)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eSix pure nickel strips, cut to match the factory cell layout of the M18 5S2P pack. No measuring, no cutting, no guesswork.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eProduct Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Pure nickel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 0.25 mm — thicker than standard 0.15–0.2 mm strip, for lower resistance and less heat under load\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePiece count:\u003c\/strong\u003e 6 pieces per set\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCut to shape:\u003c\/strong\u003e Matched to the factory cell layout of the M18 5.0Ah \/ 6.0Ah pack\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCell format:\u003c\/strong\u003e 18650\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e 5S2P (10-cell)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Brand new\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits Milwaukee M18 \u003cstrong\u003e5.0Ah\u003c\/strong\u003e and \u003cstrong\u003e6.0Ah\u003c\/strong\u003e packs built on 18650 cells\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDoes not fit\u003c\/strong\u003e M18 8.0Ah or 12.0Ah packs — those use 21700 cells and a different nickel layout\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat Is Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e6 pre-cut pure nickel strips — one complete set for a single M18 pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat Is Not Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBattery cells\u003c\/li\u003e\n  \u003cli\u003eBMS \/ control board\u003c\/li\u003e\n  \u003cli\u003eHousing, case, or hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eAssembly Requirements\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSpot welding required\u003c\/li\u003e\n  \u003cli\u003ePure nickel at 0.25 mm needs more weld energy than thin plated strip — set your welder accordingly\u003c\/li\u003e\n  \u003cli\u003eExperience with lithium pack assembly recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Safety Information\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLithium battery work carries fire risk. Keep cells insulated, never short a pack.\u003c\/li\u003e\n  \u003cli\u003eSpot welding produces fume. Work in a ventilated area.\u003c\/li\u003e\n  \u003cli\u003e⚠️ \u003cstrong\u003eWARNING: Cancer — www.P65Warnings.ca.gov\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eShips from California — fast U.S. delivery.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAdditional Parts and Resources\u003c\/strong\u003e\u003cbr\u003e\nFor more battery rebuild supplies, cells, BMS boards, and nickel by the roll, visit our shop \u003cstrong\u003eRenewSpark\u003c\/strong\u003e. We also offer the \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e app, built to help DIY builders and professionals with calculators and utilities for battery rebuilding projects.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eMilwaukee and M18 are trademarks of their respective owners. This compatible product is independently manufactured and is not produced, sponsored, or endorsed by Milwaukee.\u003c\/em\u003e\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47337839100131,"sku":"PC104","price":10.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/FullSizeRender_a0095639-bc3f-4754-9d73-d0fa32ba01ce.heic?v=1760760675"},{"product_id":"ryo-18v-10-cell-precut-nickel-strips","title":"Pre-Cut Pure Nickel Strip Set – Ryobi 18V 10-Cell 18650 – 6 Pcs","description":"\u003ch2\u003ePre-Cut Pure Nickel Strip Set for Ryobi 18V 10-Cell 18650 Packs (6 Pieces)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eSix pure nickel strips, cut to match the factory cell layout of the Ryobi 18V 10-cell pack. No measuring, no cutting, no guesswork.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eProduct Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Pure nickel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 0.2 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePiece count:\u003c\/strong\u003e 6 pieces per set\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCut to shape:\u003c\/strong\u003e Matched to the factory cell layout of the Ryobi 18V 10-cell pack\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCell format:\u003c\/strong\u003e 18650\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Brand new\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits Ryobi 18V lithium-ion packs built on \u003cstrong\u003e10 × 18650\u003c\/strong\u003e cells\u003c\/li\u003e\n  \u003cli\u003eCheck your pack's cell count and layout before ordering — Ryobi 18V packs are built in several configurations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat Is Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e6 pre-cut pure nickel strips — one complete set for a single Ryobi 18V 10-cell pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat Is Not Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBattery cells\u003c\/li\u003e\n  \u003cli\u003eBMS \/ control board\u003c\/li\u003e\n  \u003cli\u003eHousing, case, or hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eAssembly Requirements\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSpot welding required\u003c\/li\u003e\n  \u003cli\u003ePure nickel needs more weld energy than plated strip — set your welder accordingly\u003c\/li\u003e\n  \u003cli\u003eExperience with lithium pack assembly recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Safety Information\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLithium battery work carries fire risk. Keep cells insulated, never short a pack.\u003c\/li\u003e\n  \u003cli\u003eSpot welding produces fume. Work in a ventilated area.\u003c\/li\u003e\n  \u003cli\u003e⚠️ \u003cstrong\u003eWARNING: Cancer — www.P65Warnings.ca.gov\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eShips from California — fast U.S. delivery.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAdditional Parts and Resources\u003c\/strong\u003e\u003cbr\u003e\nFor more battery rebuild supplies, cells, BMS boards, and nickel by the roll, visit our shop \u003cstrong\u003eRenewSpark\u003c\/strong\u003e. We also offer the \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e app, built to help DIY builders and professionals with calculators and utilities for battery rebuilding projects.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eRyobi is a trademark of its respective owner. This compatible product is independently manufactured and is not produced, sponsored, or endorsed by Ryobi.\u003c\/em\u003e\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47350751035619,"sku":"PC107","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/FullSizeRender_80efc804-bca6-4b7b-9723-45bba458968d.heic?v=1760896645"},{"product_id":"molicel-p50b-21700-5000mah","title":"Molicel P50B 21700 3.6V 5000mAh 60A Li-ion Battery Cell – High Power","description":"\u003cdiv style=\"font-family: Arial, sans-serif; line-height: 1.6;\"\u003e\n\u003ch2\u003eMolicel P50B 21700 – 5.0Ah 60A High Power Cell\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eMolicel’s P50B\u003c\/strong\u003e represents the next evolution of high-performance 21700 cells, engineered for applications demanding both high capacity and very high discharge power. With a typical capacity of \u003cstrong\u003e5000mAh (5.0Ah)\u003c\/strong\u003e and a \u003cstrong\u003e60A continuous discharge rating\u003c\/strong\u003e, it delivers exceptional energy density, low impedance and strong thermal stability.\u003c\/p\u003e\n\u003ch3\u003e⚙️ Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e Molicel INR-21700-P50B\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal Voltage:\u003c\/strong\u003e 3.6V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical Capacity:\u003c\/strong\u003e 5000mAh (5.0Ah)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Capacity:\u003c\/strong\u003e 4850mAh\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuous Discharge:\u003c\/strong\u003e 60A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax Charge Current:\u003c\/strong\u003e 25A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTypical Energy:\u003c\/strong\u003e 18.0Wh\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCharging Voltage:\u003c\/strong\u003e 4.2V ± 0.05V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutoff Voltage:\u003c\/strong\u003e 2.5V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCell Type:\u003c\/strong\u003e 21700 Li-ion (Flat Top, unprotected)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 21.55mm × 70.15mm max\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e ~70g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e🔋 Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCustom high-capacity battery packs\u003c\/li\u003e\n\u003cli\u003ePower tools and e-bikes\u003c\/li\u003e\n\u003cli\u003eFlashlights and robotics projects\u003c\/li\u003e\n\u003cli\u003ePortable energy storage systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e🧠 Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAuthentic Molicel cells sourced from verified distributors.\u003c\/li\u003e\n\u003cli\u003eUnprotected bare cell intended for battery builders — always use a proper BMS when assembling packs.\u003c\/li\u003e\n\u003cli\u003ePrice listed per single cell unless a multi-pack option is selected.\u003c\/li\u003e\n\u003cli\u003eDo not short-circuit, crush, puncture or expose to heat.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e💬 Why Buy from RenewSpark\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e100% genuine Molicel cells\u003c\/li\u003e\n\u003cli\u003e30-day returns on unused cells (cells cannot be returned once welded)\u003c\/li\u003e\n\u003cli\u003eShips from California\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eBuilding or rebuilding a pack? Browse \u003ca href=\"https:\/\/renewspark.com\/collections\/21700-cells\"\u003eall 21700 cells\u003c\/a\u003e, plus nickel strip, BMS boards and insulation supplies at RenewSpark.\u003c\/p\u003e\n\u003cp\u003e—  \u003cbr\u003eDownload “RenewSpark Tools” on the iOS App Store — the toolbox I use for battery building.\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Molicel","offers":[{"title":"1 Cell","offer_id":47403138416867,"sku":"CE112","price":8.99,"currency_code":"USD","in_stock":false},{"title":"5 Cells","offer_id":47403138449635,"sku":"CE113","price":42.99,"currency_code":"USD","in_stock":false},{"title":"10 Cells","offer_id":47403138482403,"sku":"CE114","price":79.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/FullSizeRender_7bd78acb-393a-45ca-87b5-895b5a88eea9.heic?v=1762276680"},{"product_id":"21700-battery-spacer-1x2-cell-holder","title":"21700 Cell Spacer \/ Holder – 1×2 Radiating Grid for Pack Assembly","description":"\u003cdiv style=\"max-width: 900px; margin: 0 auto; line-height: 1.6; font-size: 16px;\"\u003e\n\u003ch1\u003e21700 Battery Spacer – 1×2 Radiating Cell Holder\u003c\/h1\u003e\n\u003cp\u003eDesign professional-grade battery packs with these \u003cstrong\u003e1×2 21700 spacers\u003c\/strong\u003e. Their rigid interlocking design keeps cells evenly spaced, promotes heat dissipation, and adds mechanical strength for welding and assembly.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInterlocking structure:\u003c\/strong\u003e build any grid size or pack shape.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRadiating design:\u003c\/strong\u003e open airflow channels improve cooling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigid ABS\/PC plastic:\u003c\/strong\u003e durable and lightweight.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision fit:\u003c\/strong\u003e holds 21700 cells securely for spot welding.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCell size: \u003cstrong\u003e21700 (Ø21 mm × 70 mm)\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eConfiguration: \u003cstrong\u003e1×2 cell layout\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eMaterial: ABS\/PC (black)\u003c\/li\u003e\n\u003cli\u003eTemperature range: −20 °C – 80 °C typical\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePackage Includes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYour selected quantity of \u003cstrong\u003e1×2 21700 spacers\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUsage\u003c\/h3\u003e\n\u003cp\u003eIdeal for \u003cem\u003eDIY e-bike, power tool, solar, and robotics battery packs\u003c\/em\u003e. For 18650 cells, see our  18650Spacers.\u003c\/p\u003e\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSpacers only – batteries, nickel strips, and BMS not included.\u003c\/li\u003e\n\u003cli\u003eEnsure proper insulation and cell polarity when assembling packs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"margin-top: 16px;\"\u003eQuestions about quantities or layout design? \u003cstrong\u003eMessage RenewSpark\u003c\/strong\u003e for help.\u003c\/p\u003e\n\u003cp style=\"margin-top: 16px;\"\u003e—  \u003cbr\u003eDownload “RenewSpark Tools” on the iOS App Store — the toolbox I use for battery building.\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"RenewSpark","offers":[{"title":"10-Pack","offer_id":47445770272995,"sku":"HD105","price":3.49,"currency_code":"USD","in_stock":false},{"title":"50-Pack","offer_id":47445770305763,"sku":"HD106","price":7.49,"currency_code":"USD","in_stock":false},{"title":"100-Pack","offer_id":47445770338531,"sku":"HD107","price":12.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/IMG_2891.jpg?v=1762226003"},{"product_id":"dewalt-20v-18650-battery-cell-holder","title":"DeWalt 20V Battery Cell Holder – 10-Slot 18650 Spacer for Power Tool Battery Rebuilds","description":"\u003cdiv style=\"max-width: 900px; margin: 0 auto; line-height: 1.6; font-size: 16px;\"\u003e\n\u003ch1\u003eDeWalt 20V Battery Cell Holder – 10-Slot 18650 Spacer for Power Tool Battery Rebuilds\u003c\/h1\u003e\n\u003cp\u003eThis precision-molded \u003cstrong\u003e10-slot 18650 cell holder\u003c\/strong\u003e is designed for rebuilding or upgrading \u003cstrong\u003eDeWalt 20V MAX power tool batteries\u003c\/strong\u003e. It securely holds each cell in place to maintain alignment, improve cooling, and prevent movement inside the pack.\u003c\/p\u003e\n\u003ch2\u003e🔧 Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCompatible with \u003cstrong\u003eDeWalt 20V \/ 18V packs\u003c\/strong\u003e that use 18650 cells\u003c\/li\u003e\n\u003cli\u003eHolds exactly \u003cstrong\u003e10 × 18650 Li-ion cells\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eDurable \u003cstrong\u003eABS plastic\u003c\/strong\u003e construction – heat and impact resistant\u003c\/li\u003e\n\u003cli\u003ePerfect fit for OEM-style DeWalt power tool battery rebuilds\u003c\/li\u003e\n\u003cli\u003eLightweight and easy to install – drop-in replacement for stock holders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e🧰 Applications\u003c\/h2\u003e\n\u003cp\u003eIdeal for technicians and DIY builders rebuilding \u003cstrong\u003eDeWalt 20V MAX \/ XR packs\u003c\/strong\u003e or creating custom Li-ion packs.\u003c\/p\u003e\n\u003ch2\u003e📦 Package Includes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × 10-slot DeWalt 20V 18650 battery cell holder (top or bottom half)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: Cells, nickel strips, and BMS not included.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e✔️ \u003cstrong\u003eIn stock\u003c\/strong\u003e – ships from Irvine, CA\u003c\/p\u003e\n\u003cp\u003e—  \u003cbr\u003eDownload “RenewSpark Tools” on the iOS App Store — the toolbox I use for battery building.\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47453604413667,"sku":"HD108","price":4.2,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/F8092DCF-2850-4A48-B4E8-EBC63F7ACDE4.jpg?v=1762279313"},{"product_id":"milwaukee-m18-18650-battery-cell-holder","title":"Milwaukee M18 Battery Cell Holder – 10-Slot 18650 Spacer for Power Tool Battery Rebuilds","description":"\u003cdiv style=\"max-width: 900px; margin: 0 auto; line-height: 1.6; font-size: 16px;\"\u003e\n\u003ch1\u003eMilwaukee M18 Battery Cell Holder – 10-Slot 18650 Spacer for Power Tool Battery Rebuilds\u003c\/h1\u003e\n\u003cp\u003eThis durable \u003cstrong\u003e10-slot 18650 cell holder\u003c\/strong\u003e is specifically designed for rebuilding or upgrading \u003cstrong\u003eMilwaukee M18 18V power tool batteries\u003c\/strong\u003e. It keeps all ten cells perfectly aligned and secured inside the pack for a professional-quality rebuild.\u003c\/p\u003e\n\u003ch2\u003e🔧 Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eCompatible with \u003cstrong\u003eMilwaukee M18 \/ 18V packs\u003c\/strong\u003e that use 18650 Li-ion cells\u003c\/li\u003e\n\u003cli\u003eHolds \u003cstrong\u003e10 × 18650 cells\u003c\/strong\u003e (top or bottom half design)\u003c\/li\u003e\n\u003cli\u003eMade from \u003cstrong\u003ehigh-temperature ABS plastic\u003c\/strong\u003e for strength and durability\u003c\/li\u003e\n\u003cli\u003eEnsures uniform cell spacing and excellent vibration resistance\u003c\/li\u003e\n\u003cli\u003ePerfect for technicians, repair shops, and DIY rebuilders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e🧰 Applications\u003c\/h2\u003e\n\u003cp\u003eIdeal for rebuilding \u003cstrong\u003eMilwaukee M18 REDLITHIUM\u003c\/strong\u003e batteries or creating custom Li-ion packs using 18650 cells.\u003c\/p\u003e\n\u003ch2\u003e📦 Package Includes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × 10-slot Milwaukee M18 18650 cell holder (top or bottom half)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eNote: Cells, nickel strips, and BMS are not included.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e✔️ \u003cstrong\u003eIn stock\u003c\/strong\u003e – ships from Irvine, CA\u003c\/p\u003e\n\u003cp\u003e—  \u003cbr\u003eDownload “RenewSpark Tools” on the iOS App Store — the toolbox I use for battery building.\u003cbr\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47454069981411,"sku":"HD109","price":4.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/FullSizeRender_e47087a3-b7d5-46fa-8e68-7d9d1a061bd9.heic?v=1762280493"},{"product_id":"enerkey-120a-smart-bms-3s-8s","title":"Enerkey 120A Smart BMS 3S–8S 12V–24V Li-ion Battery Management System","description":"\u003ch2\u003eEnerkey 120A Smart BMS – 3S–8S Li-ion (NCM)\u003c\/h2\u003e\n\n\u003cp\u003e\nThe \u003cstrong\u003eEnerkey EK-BM3R8S120A\u003c\/strong\u003e is a high-current smart Battery Management System designed for\n\u003cstrong\u003eLi-ion (NCM \/ 4.2V per cell)\u003c\/strong\u003e battery packs from \u003cstrong\u003e3S to 8S\u003c\/strong\u003e.\nIt is built for demanding applications requiring reliable protection and cell balancing.\n\u003c\/p\u003e\n\n\u003cp style=\"color:#b00000; font-weight:bold;\"\u003e\n⚠️ Chemistry Compatibility Notice:\u003cbr\u003e\nThis BMS is configured for \u003cstrong\u003eLi-ion (NCM)\u003c\/strong\u003e chemistry only.\u003cbr\u003e\n\u003cstrong\u003eNot compatible with LTO or LiFePO₄\u003c\/strong\u003e battery packs.\n\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSupports 3S, 4S, 5S, 6S, 7S, and 8S Li-ion (NCM)\u003c\/li\u003e\n  \u003cli\u003e120A continuous discharge capability\u003c\/li\u003e\n  \u003cli\u003eOver-charge, over-discharge, over-current, and short-circuit protection\u003c\/li\u003e\n  \u003cli\u003eCell balancing for improved pack longevity\u003c\/li\u003e\n  \u003cli\u003eDual NTC temperature sensors for thermal safety\u003c\/li\u003e\n  \u003cli\u003eAluminum heat-sink enclosure for cooling\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Includes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Enerkey EK-BM3R8S120A Smart BMS\u003c\/li\u003e\n  \u003cli\u003e1 × Balance wire harness\u003c\/li\u003e\n  \u003cli\u003e2 × NTC temperature sensors\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Enerkey\u003cbr\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e EK-BM3R8S120A\u003cbr\u003e\n\u003cstrong\u003eChemistry:\u003c\/strong\u003e Li-ion (NCM, 4.2V per cell)\u003cbr\u003e\n\u003cstrong\u003eSold by:\u003c\/strong\u003e RenewSpark\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003cp style=\"font-size:0.9em; color:#555;\"\u003e\nDownload \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e on the iOS App Store — the toolbox I use for battery building.\n\u003c\/p\u003e","brand":"Enerkey","offers":[{"title":"Default Title","offer_id":47490909208803,"sku":"BM106","price":39.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/FullSizeRender_83d46bdd-dd0d-4da5-9bd6-acce4e1db726.jpg?v=1762658123"},{"product_id":"enerkey-8s-200a-smart-bms","title":"Enerkey 8S 24V 200A Smart BMS for Li-ion Battery Packs – With Aluminum Heat Dissipation","description":"\u003cdiv style=\"font-family: Arial,Helvetica,sans-serif; line-height: 1.6; color: #333;\"\u003e\n  \u003ch2\u003eEnerkey 8S Li-ion (NCM) 200A Smart Battery Management System\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The \u003cstrong\u003eEnerkey EK-BM3R8S200A\u003c\/strong\u003e is a heavy-duty, high-current\n    \u003cstrong\u003eBattery Management System (BMS)\u003c\/strong\u003e designed for\n    \u003cstrong\u003e8S Li-ion (NCM \/ 4.2V per cell)\u003c\/strong\u003e battery packs.\n    It supports up to \u003cstrong\u003e200A continuous discharge\u003c\/strong\u003e and features\n    a robust aluminum heatsink for improved thermal performance and reliability.\n  \u003c\/p\u003e\n\n  \u003cp style=\"color:#b00000; font-weight:bold;\"\u003e\n    ⚠️ Chemistry Compatibility Notice:\u003cbr\u003e\n    This BMS is configured for \u003cstrong\u003eLi-ion (NCM)\u003c\/strong\u003e chemistry only.\u003cbr\u003e\n    \u003cstrong\u003eNot compatible with LTO or LiFePO₄\u003c\/strong\u003e battery packs.\n  \u003c\/p\u003e\n\n  \u003ch3\u003e⚙️ Key Features\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eSupports \u003cstrong\u003e8S Li-ion (NCM)\u003c\/strong\u003e battery packs\u003c\/li\u003e\n    \u003cli\u003eUp to \u003cstrong\u003e200A continuous discharge\u003c\/strong\u003e\n\u003c\/li\u003e\n    \u003cli\u003eHigh-performance \u003cstrong\u003ealuminum heatsink\u003c\/strong\u003e for heat dissipation\u003c\/li\u003e\n    \u003cli\u003eCell balancing for improved pack health\u003c\/li\u003e\n    \u003cli\u003eProtection against over-charge, over-discharge, over-current, and short circuit\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDual NTC temperature sensors\u003c\/strong\u003e for thermal monitoring\u003c\/li\u003e\n    \u003cli\u003eWired connection with heavy-duty terminals for high-current applications\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003e📦 Package Includes\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003e1 × Enerkey EK-BM3R8S200A Smart BMS (Li-ion NCM)\u003c\/li\u003e\n    \u003cli\u003e1 × Balance wire harness\u003c\/li\u003e\n    \u003cli\u003e2 × NTC temperature sensors\u003c\/li\u003e\n    \u003cli\u003e1 × Aluminum heatsink\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003e🧠 Applications\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eLi-ion (NCM) solar energy storage systems\u003c\/li\u003e\n    \u003cli\u003eHigh-power e-bikes and scooters\u003c\/li\u003e\n    \u003cli\u003eDIY Li-ion battery projects\u003c\/li\u003e\n    \u003cli\u003ePortable power stations\u003c\/li\u003e\n    \u003cli\u003eInverter or DC system protection\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp\u003e\n    \u003cstrong\u003ePCB Size:\u003c\/strong\u003e 125 × 68 × 15 mm\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    \u003cstrong\u003eManufacturer:\u003c\/strong\u003e Enerkey\u003cbr\u003e\n    \u003cstrong\u003eDistributed by:\u003c\/strong\u003e RenewSpark\u003cbr\u003e\n    \u003cstrong\u003eModel:\u003c\/strong\u003e EK-BM3R8S200A\u003cbr\u003e\n    \u003cstrong\u003eChemistry:\u003c\/strong\u003e Li-ion (NCM, 4.2V per cell)\n  \u003c\/p\u003e\n\n  \u003chr\u003e\n\n  \u003cp style=\"font-size:0.9em; color:#555;\"\u003e\n    Download \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e on the iOS App Store —\n    the toolbox I use for battery building.\n  \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Enerkey","offers":[{"title":"Default Title","offer_id":47491176726755,"sku":"BM107","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/IMG_3176.jpg?v=1762659204"},{"product_id":"enerkey-3s-4s-80a-bms-ntc-balancing","title":"Enerkey 3S\/4S 10–80A BMS (Peak 120A) with NTC \u0026 Cell Balancing – Li-ion","description":"\u003cp\u003e\u003cstrong\u003eEnerkey 3S\/4S 10–80A BMS (Peak 120A) with NTC \u0026amp; Cell Balancing – Li-ion (NCM)\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\nThis Enerkey hardware BMS is designed for DIY battery pack builders who need reliable protection\nfor \u003cstrong\u003e3S or 4S Li-ion (NCM \/ 4.2V per cell)\u003c\/strong\u003e packs in the\n\u003cstrong\u003e12–16.8V\u003c\/strong\u003e range. It provides robust hardware-based protection and\nonboard cell balancing to help maintain long-term pack health.\n\u003c\/p\u003e\n\n\u003cp style=\"color:#b00000; font-weight:bold;\"\u003e\n⚠️ Chemistry Compatibility Notice:\u003cbr\u003e\nThis BMS is configured for \u003cstrong\u003eLi-ion (NCM)\u003c\/strong\u003e chemistry only.\u003cbr\u003e\n\u003cstrong\u003eNot compatible with LiFePO₄ (LFP), LTO, or sodium-ion (SIB)\u003c\/strong\u003e packs.\n\u003c\/p\u003e\n\n\u003cp\u003e\nThe board includes protection against over-charge, over-discharge, over-current,\nand short-circuit conditions. An \u003cstrong\u003eNTC temperature sensor input\u003c\/strong\u003e\nallows thermal monitoring and shutdown if unsafe temperatures are detected.\n\u003c\/p\u003e\n\n\u003chr\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSupports \u003cstrong\u003e3S or 4S Li-ion (NCM)\u003c\/strong\u003e battery packs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e10–80A continuous\u003c\/strong\u003e discharge capability (model dependent)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUp to 120A peak\u003c\/strong\u003e current for short bursts\u003c\/li\u003e\n  \u003cli\u003eIntegrated \u003cstrong\u003ecell balancing\u003c\/strong\u003e for voltage equalization\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNTC temperature sensor input\u003c\/strong\u003e for thermal protection\u003c\/li\u003e\n  \u003cli\u003eHardware protection: over-charge, over-discharge, over-current, short circuit\u003c\/li\u003e\n  \u003cli\u003eHeavy copper current paths for high-current operation\u003c\/li\u003e\n  \u003cli\u003eMulti-color balance \/ NTC wiring harness included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e3S \/ 4S Li-ion power packs\u003c\/li\u003e\n  \u003cli\u003eHigh-current DC systems up to 80A continuous\u003c\/li\u003e\n  \u003cli\u003eDIY inverter or tool battery packs (with proper enclosure and wiring)\u003c\/li\u003e\n  \u003cli\u003eRC, robotics, and maker projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications (Overview)\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSeries cells: \u003cstrong\u003e3S or 4S\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eChemistry: \u003cstrong\u003eLi-ion (NCM, 4.2V per cell)\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eContinuous current: \u003cstrong\u003eup to 80A\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003ePeak current: \u003cstrong\u003eup to 120A\u003c\/strong\u003e (short duration)\u003c\/li\u003e\n  \u003cli\u003eProtection: over-voltage, under-voltage, over-current, short-circuit, temperature (with NTC)\u003c\/li\u003e\n  \u003cli\u003eBalancing: onboard cell balancing\u003c\/li\u003e\n  \u003cli\u003eBoard type: hardware BMS (no Bluetooth \/ app)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Enerkey 3S\/4S 10–80A BMS (Peak 120A) board\u003c\/li\u003e\n  \u003cli\u003e1 × balance \/ NTC wiring harness\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003eCells, wiring, bus bars, and enclosure are not included.\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003eThis is an advanced DIY product. Incorrect wiring or exceeding current ratings can damage the BMS or battery.\u003c\/li\u003e\n  \u003cli\u003eAlways fuse your pack appropriately and test with a current-limited power supply on first power-up.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003ePart of the RenewSpark Enerkey hardware BMS lineup — build smarter, safer Li-ion packs.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp style=\"font-size:0.9em; color:#555;\"\u003e\n—\u003cbr\u003e\nDownload \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e on the iOS App Store — the toolbox I use for battery building.\n\u003c\/p\u003e","brand":"Enerkey","offers":[{"title":"Default Title","offer_id":47524216832227,"sku":"BM105","price":20.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/FullSizeRender_0d51e530-d275-473b-8fc6-053541412ccd.jpg?v=1763091324"},{"product_id":"2s-10a-bms-hx-2s-d20","title":"2S 10A Lithium-Ion BMS Protection Board (HX-2S-D20) – 7.4V\/8.4V Li-ion","description":"\u003cp\u003e\u003cstrong\u003ePower your 2-cell battery projects with the HX-2S-D20 2S 10A Lithium-Ion BMS.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis compact protection board is designed for 7.4V \/ 8.4V Li-ion battery packs using 18650 or 21700 cells. It delivers reliable overcharge, over-discharge, overcurrent, and short-circuit protection while maintaining cell balance for longer pack life.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSupports 2S Li-ion (7.4V nominal, 8.4V full)\u003c\/li\u003e\n  \u003cli\u003e10A continuous discharge current\u003c\/li\u003e\n  \u003cli\u003eOvercharge \u0026amp; over-discharge protection\u003c\/li\u003e\n  \u003cli\u003eShort-circuit and overcurrent protection\u003c\/li\u003e\n  \u003cli\u003eBuilt-in cell balancing\u003c\/li\u003e\n  \u003cli\u003eSmall, lightweight PCB\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDIY Li-ion battery packs\u003c\/li\u003e\n  \u003cli\u003eRC vehicles \u0026amp; FPV\u003c\/li\u003e\n  \u003cli\u003eArduino \u0026amp; robotics projects\u003c\/li\u003e\n  \u003cli\u003eLED and portable electronics\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Includes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × HX-2S-D20 2S 10A BMS Protection Board\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNeed help picking the correct BMS?\u003c\/strong\u003e Download our free app \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e for calculators, guides, and battery-building tools.\u003c\/p\u003e\n\n\u003cp\u003eFor more battery parts and rebuild supplies, just search \u003cstrong\u003eRenewSpark\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eShips fast from the USA. Shipping calculated at checkout.\u003c\/strong\u003e\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47714892316899,"sku":"BM104","price":4.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/IMG_4527.jpg?v=1765213389"},{"product_id":"bak-n18650cop-18650-3-6v-2500mah","title":"BAK N18650COP 18650 Battery Cell 3.6V 2500mAh 2.5Ah Li-ion Rechargeable","description":"\u003cp\u003eBAK N18650COP lithium-ion cells — a dependable 18650 for DIY battery packs, power tool rebuilds, flashlights, and electronics projects. A widely used stand-in for the discontinued Samsung 25R. Cells only; buy 1, 2, 4, or 8.\u003c\/p\u003e\n\n\u003ch3\u003eChoose your quantity\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e1 cell\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e2 cells\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e4 cells\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e8 cells\u003c\/strong\u003e — best per-cell price\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eLooking for a storage case? We sell clear protective cases separately in 2-cell and 4-cell sizes.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e BAK N18650COP\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCell type:\u003c\/strong\u003e 18650 Li-ion, rechargeable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal voltage:\u003c\/strong\u003e 3.6V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 2500mAh (2.5Ah)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTerminal:\u003c\/strong\u003e Flat top (unprotected)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon uses\u003c\/h3\u003e\n\u003cp\u003eDIY battery pack builds, power tool pack rebuilds, flashlights, portable power banks, and general electronics projects needing reliable 18650 cells.\u003c\/p\u003e\n\n\u003ch3\u003eImportant safety information\u003c\/h3\u003e\n\u003cp\u003eThese are bare, unprotected cells intended for battery builders and experienced users. They are not drop-in replacements for protected cells.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUse a proper BMS\/PCM when building packs\u003c\/li\u003e\n\u003cli\u003eDo not short-circuit, crush, puncture, or expose to heat\u003c\/li\u003e\n\u003cli\u003eNever charge unattended\u003c\/li\u003e\n\u003cli\u003eNever use cells with damaged wrappers — rewrap before use\u003c\/li\u003e\n\u003cli\u003eWhen building packs, use cells of matched capacity and internal resistance\u003c\/li\u003e\n\u003cli\u003eVerify size and electrical requirements for your project before ordering\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eShips carefully packaged to protect the cells in transit. Need larger quantities? Message us about bulk options.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBuilding or rebuilding battery packs?\u003c\/strong\u003e For cells, nickel strip, BMS boards, insulation rings, and other rebuild supplies, browse the rest of the RenewSpark store.\u003c\/p\u003e\n\n\u003cp\u003eAssembly and use are at your own risk. See our Terms of Service for full details.\u003c\/p\u003e","brand":"BAK","offers":[{"title":"1 cell","offer_id":47738236502243,"sku":"CE109","price":3.99,"currency_code":"USD","in_stock":true},{"title":"2 cells","offer_id":49503072354531,"sku":"CE101","price":7.59,"currency_code":"USD","in_stock":true},{"title":"4 cells","offer_id":49503072387299,"sku":"CE103","price":14.39,"currency_code":"USD","in_stock":true},{"title":"8 cells","offer_id":49503072420067,"sku":"CE102","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/IMG_4925.jpg?v=1765834891"},{"product_id":"milwaukee-m18-12ah-battery-case-bms-kit","title":"Milwaukee M18 12.0Ah Battery Rebuild Kit - 15x21700 Case + BMS (No Cells)","description":"\u003ch3\u003eMilwaukee M18 12.0Ah Battery Rebuild Kit – 15×21700 Case \u0026amp; BMS\u003c\/h3\u003e\n\n\u003cp\u003e\nThis DIY rebuild kit is designed for rebuilding or repairing \u003cstrong\u003eMilwaukee M18 12.0Ah lithium-ion power tool batteries\u003c\/strong\u003e.\nIt includes a complete replacement housing, internal metal contacts, hardware, and a compatible BMS board.\nPerfect for experienced battery builders looking to restore performance using \u003cstrong\u003e15×21700 lithium-ion cells\u003c\/strong\u003e.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThis is a compatible replacement kit.\u003c\/strong\u003e It is independently manufactured and is not an original Milwaukee-branded product.\u003c\/p\u003e\n\n\u003ch4\u003eKit Includes:\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eMilwaukee M18 12.0Ah compatible battery case (top \u0026amp; bottom shell)\u003c\/li\u003e\n  \u003cli\u003eBMS \/ protection board\u003c\/li\u003e\n  \u003cli\u003eNickel-plated internal contact plates\u003c\/li\u003e\n  \u003cli\u003eSpring contacts\u003c\/li\u003e\n  \u003cli\u003eThermal pad and insulation pieces\u003c\/li\u003e\n  \u003cli\u003eScrews and assembly hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eCell Configuration:\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for \u003cstrong\u003e15 × 21700 lithium-ion cells\u003c\/strong\u003e (5S3P layout)\u003c\/li\u003e\n  \u003cli\u003eFits Milwaukee M18 tools and compatible chargers\u003c\/li\u003e\n  \u003cli\u003eCells are \u003cstrong\u003eNOT included\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eBattery Capacity:\u003c\/h4\u003e\n\u003cp\u003e\nThis kit uses a 5S3P configuration, so the finished pack capacity is approximately three times the rated capacity of each individual 21700 cell. Fifteen matched 4,000mAh cells produce a pack of roughly 12Ah. Actual capacity, output current, and runtime depend on the cells selected and the quality of the assembly.\n\u003c\/p\u003e\n\n\u003ch4\u003eWhat Is Not Included:\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e21700 lithium-ion cells\u003c\/strong\u003e — you supply your own\u003c\/li\u003e\n  \u003cli\u003eSpot welder\u003c\/li\u003e\n  \u003cli\u003eBattery charger\u003c\/li\u003e\n  \u003cli\u003ePower tool\u003c\/li\u003e\n  \u003cli\u003eBattery assembly service\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eImportant Information:\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eThis is a \u003cstrong\u003eDIY battery rebuild kit\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eBattery assembly experience is required\u003c\/li\u003e\n  \u003cli\u003eSpot welding is strongly recommended\u003c\/li\u003e\n  \u003cli\u003eUse only properly tested and closely matched cells. Do not mix cells of different brands, models, capacities, ages, or condition.\u003c\/li\u003e\n  \u003cli\u003eAlways verify cell orientation, polarity, insulation, and pack voltage before connecting to a tool or charger\u003c\/li\u003e\n  \u003cli\u003ePlease review all product photos carefully before ordering\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eAdditional Parts and Resources\u003c\/h4\u003e\n\n\u003cp\u003e\nFor additional battery-building parts — cells, nickel strips, insulation rings, BMS boards,\nconnectors, and other DIY battery supplies — visit \u003cstrong\u003eRenewSpark\u003c\/strong\u003e.\n\u003c\/p\u003e\n\n\u003cp\u003e\nFor helpful tools, calculators, rebuild planning utilities, and technical information, download the\n\u003cstrong\u003eRenewSpark Tools app\u003c\/strong\u003e.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMilwaukee and M18 are trademarks of their respective owner. This compatible product is independently manufactured and is not produced, sponsored, or endorsed by Milwaukee.\u003c\/strong\u003e\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47743891996899,"sku":"KT107","price":82.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/IMG_4922.jpg?v=1766014008"},{"product_id":"8-4v-2a-charger-2s-lithium","title":"8.4V 2A Charger for 2S 7.4V Li-ion Battery Packs – 5.5×2.1mm","description":"\u003ch2\u003e8.4V 2A Charger for 2S 7.4V Lithium-Ion Battery Packs\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eCharge compatible 2S lithium-ion and lithium-polymer battery packs with an 8.4V charging voltage and DC 5.5 × 2.1 mm connector.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis charger is designed for 2-series lithium battery packs with a nominal voltage of 7.4V and a fully charged voltage of 8.4V. It can be used with compatible battery packs assembled from 18650 or 21700 lithium-ion cells.\u003c\/p\u003e\n\n\u003cp\u003eCommon compatible applications may include DIY 2S battery packs, portable electronics, LED bicycle-light battery packs, hobby projects, and other equipment that uses a compatible 7.4V lithium battery pack.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Compatibility requires the correct battery chemistry, pack voltage, charging current, connector size, and polarity. Please compare the specifications of your original charger and battery before use.\u003c\/p\u003e\n\n\u003ch3\u003eProduct Specifications\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCharger output voltage: 8.4V DC\u003c\/li\u003e\n  \u003cli\u003eMaximum charging current: 2A\u003c\/li\u003e\n  \u003cli\u003eCompatible battery configuration: 2S\u003c\/li\u003e\n  \u003cli\u003eCompatible nominal battery voltage: 7.4V\u003c\/li\u003e\n  \u003cli\u003eCompatible fully charged voltage: 8.4V\u003c\/li\u003e\n  \u003cli\u003eConnector size: DC 5.5 × 2.1 mm barrel plug\u003c\/li\u003e\n  \u003cli\u003eDesigned for lithium-ion and compatible lithium-polymer battery packs\u003c\/li\u003e\n  \u003cli\u003eSuitable for compatible 18650 and 21700 cell-based battery packs\u003c\/li\u003e\n  \u003cli\u003eUS wall plug\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003e2S 7.4V lithium-ion battery packs\u003c\/li\u003e\n  \u003cli\u003eDIY 18650 battery packs\u003c\/li\u003e\n  \u003cli\u003eDIY 21700 battery packs\u003c\/li\u003e\n  \u003cli\u003eCompatible LED bicycle-light battery packs\u003c\/li\u003e\n  \u003cli\u003ePortable electronics and lighting projects\u003c\/li\u003e\n  \u003cli\u003eHobby and custom battery-powered equipment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatibility Requirements\u003c\/h3\u003e\n\n\u003cp\u003eBefore ordering, confirm that your battery or original charger requires all of the following:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e2S lithium-ion or lithium-polymer battery chemistry\u003c\/li\u003e\n  \u003cli\u003e7.4V nominal battery voltage\u003c\/li\u003e\n  \u003cli\u003e8.4V charging voltage\u003c\/li\u003e\n  \u003cli\u003eUp to 2A charging current\u003c\/li\u003e\n  \u003cli\u003eDC 5.5 × 2.1 mm barrel connector\u003c\/li\u003e\n  \u003cli\u003eMatching connector polarity\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe battery pack should contain a properly installed and functioning battery management system, or BMS, designed for 2S lithium-ion charging.\u003c\/p\u003e\n\n\u003ch3\u003eNot Compatible With\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSingle-cell 3.7V or 4.2V lithium batteries\u003c\/li\u003e\n  \u003cli\u003e3S, 4S, or higher-voltage lithium battery packs\u003c\/li\u003e\n  \u003cli\u003e12V lead-acid batteries\u003c\/li\u003e\n  \u003cli\u003eNiMH or NiCd battery packs\u003c\/li\u003e\n  \u003cli\u003eLiFePO4 battery packs requiring a different charging voltage\u003c\/li\u003e\n  \u003cli\u003eDevices with a different connector size or polarity\u003c\/li\u003e\n  \u003cli\u003eBattery packs that cannot safely accept a 2A charging current\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat Is Included\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003eOne 8.4V 2A lithium battery charger with US wall plug\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat Is Not Included\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003eLithium battery pack\u003c\/li\u003e\n  \u003cli\u003e18650 or 21700 battery cells\u003c\/li\u003e\n  \u003cli\u003eConnector adapters\u003c\/li\u003e\n  \u003cli\u003eOther accessories\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSafety Information\u003c\/h3\u003e\n\n\u003cp\u003eUse this charger only with a compatible, properly assembled 2S lithium battery pack. Do not use it with damaged, swollen, overheated, leaking, improperly wired, or unprotected battery packs.\u003c\/p\u003e\n\n\u003cp\u003eCharge lithium batteries on a nonflammable surface and do not leave them unattended while charging. Disconnect the charger if the battery or charger becomes unusually hot, emits an odor, changes shape, or behaves abnormally.\u003c\/p\u003e\n\n\u003ch3\u003eAdditional Parts and Resources\u003c\/h3\u003e\n\n\u003cp\u003eFor battery-building components, BMS boards, connectors, holders, conductive materials, and related supplies, visit \u003cstrong\u003eRenewSpark\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eFor helpful battery tools, calculators, technical information, and additional resources, download the \u003cstrong\u003eRenewSpark Tools app\u003c\/strong\u003e.\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47800218255587,"sku":"MS107","price":4.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/FullSizeRender_1c5efe19-e35e-474e-975f-bb9fa0d02507.jpg?v=1767748974"},{"product_id":"21700-insulator-rings-fish-paper","title":"21700 Battery Insulator Rings – Adhesive Fish Paper 200 \/ 400 \/ 600 pcs","description":"\u003ch2\u003e21700 Self-Adhesive Fish-Paper Insulator Rings – 200 \/ 400 \/ 600 pcs\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePrecision-sized fish-paper insulator rings for 21700 cells — dimensioned for an exact fit on the positive end so they sit flush, with no overhang or gaps. Peel, stick, and prevent top-cap shorts during spot welding and pack assembly.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExact 21700 fit\u003c\/strong\u003e – OD 19.8 mm \/ ID 10.5 mm, sized to sit flush on the cell’s positive terminal with no shifting or overhang\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle-side adhesive\u003c\/strong\u003e – peel-and-stick backing for fast, clean installation that stays put under weld pressure\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable fish paper\u003c\/strong\u003e – high dielectric strength and heat resistance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIdeal for DIY builders\u003c\/strong\u003e – battery packs, e-bikes, power tools, robotics, and energy storage projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMaterial: Fish paper (single-side adhesive)\u003c\/li\u003e\n  \u003cli\u003eOuter diameter: 19.8 mm\u003c\/li\u003e\n  \u003cli\u003eInner diameter: 10.5 mm\u003c\/li\u003e\n  \u003cli\u003eThickness: 0.2 mm\u003c\/li\u003e\n  \u003cli\u003ePack sizes: 200 \/ 400 \/ 600 pieces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat Is Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eYour selected quantity (200, 400, or 600) of 21700 self-adhesive fish-paper rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat Is Not Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBattery cells\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGood to Know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eShips flat; larger quantities may ship in multiple envelopes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Parts and Resources\u003c\/strong\u003e\u003cbr\u003e\nFor nickel, pre-cut busbars, BMS boards, and more rebuild supplies, visit our shop \u003cstrong\u003eRenewSpark\u003c\/strong\u003e. We also offer the \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e app, built to help DIY builders and professionals with battery-building calculators and utilities.\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"200","offer_id":47812625924323,"sku":"IR103","price":14.99,"currency_code":"USD","in_stock":true},{"title":"400","offer_id":47812625957091,"sku":"IR104","price":26.99,"currency_code":"USD","in_stock":true},{"title":"600","offer_id":47812625989859,"sku":"IR105","price":36.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/IMG-8138.png?v=1785499966"},{"product_id":"18650-insulator-rings-fish-paper","title":"18650 Battery Insulator Rings – Adhesive Fish Paper 200 \/ 400 \/ 600 pcs","description":"\u003ch2\u003e18650 Self-Adhesive Fish-Paper Insulator Rings – 200 \/ 400 \/ 600 pcs\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePrecision-sized fish-paper insulator rings for 18650 cells — dimensioned for an exact fit on the positive end so they sit flush, with no overhang or gaps. Peel, stick, and prevent top-cap shorts during spot welding and pack assembly.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExact 18650 fit\u003c\/strong\u003e – OD 17.8 mm \/ ID 10.5 mm, sized to sit flush on the cell’s positive terminal with no shifting or overhang\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle-side adhesive\u003c\/strong\u003e – peel-and-stick backing for fast, clean installation that stays put under weld pressure\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable fish paper\u003c\/strong\u003e – high dielectric strength and heat resistance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIdeal for DIY builders\u003c\/strong\u003e – battery packs, e-bikes, power tools, and electronics projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMaterial: Fish paper (single-side adhesive)\u003c\/li\u003e\n  \u003cli\u003eOuter diameter: 17.8 mm\u003c\/li\u003e\n  \u003cli\u003eInner diameter: 10.5 mm\u003c\/li\u003e\n  \u003cli\u003eThickness: 0.2 mm\u003c\/li\u003e\n  \u003cli\u003ePack sizes: 200 \/ 400 \/ 600 pieces\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat Is Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eYour selected quantity (200, 400, or 600) of 18650 self-adhesive fish-paper rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat Is Not Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBattery cells\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eGood to Know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eShips flat; larger quantities may ship in multiple envelopes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eAdditional Parts and Resources\u003c\/strong\u003e\u003cbr\u003e\nFor nickel, pre-cut busbars, BMS boards, and more rebuild supplies, visit our shop \u003cstrong\u003eRenewSpark\u003c\/strong\u003e. We also offer the \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e app, built to help DIY builders and professionals with battery-building calculators and utilities.\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"200","offer_id":47812659871971,"sku":"IR106","price":9.99,"currency_code":"USD","in_stock":true},{"title":"400","offer_id":47812659904739,"sku":"IR107","price":17.99,"currency_code":"USD","in_stock":true},{"title":"600","offer_id":47812659937507,"sku":"IR108","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/IMG-8135.png?v=1785499572"},{"product_id":"pre-cut-nickel-busbar-set-dewalt-60v","title":"Pre-Cut Pure Nickel Busbar Set – DeWalt DCB612 60V FlexVolt 21700 – 18 Pcs","description":"\u003ch2\u003ePre-Cut Pure Nickel Busbar Set for DeWalt DCB612 60V FlexVolt (18 Pieces)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eEighteen pure nickel busbars, cut and formed for the DCB612 FlexVolt pack. No measuring, no cutting, no guesswork.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eProduct Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Pure nickel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 0.25 mm — thicker than standard 0.2 mm strip, for lower resistance and less heat under FlexVolt current\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePiece count:\u003c\/strong\u003e 18 pieces per set\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCut to shape:\u003c\/strong\u003e Profiled for the DCB612 cell layout\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCell format:\u003c\/strong\u003e 21700\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Brand new\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat Is Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e18 pre-cut pure nickel busbar pieces\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat Is Not Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBattery cells\u003c\/li\u003e\n  \u003cli\u003eBMS \/ control board\u003c\/li\u003e\n  \u003cli\u003eHousing, case, or hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eNickel busbar set only. For the complete kit, see our DeWalt FlexVolt DCB612 60V 12Ah Battery Rebuild Kit.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAssembly Requirements\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSpot welding required\u003c\/li\u003e\n  \u003cli\u003ePure nickel at 0.25 mm needs more weld energy than thin plated strip — set your welder accordingly\u003c\/li\u003e\n  \u003cli\u003eExperience with lithium pack assembly recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Safety Information\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLithium battery work carries fire risk. Keep cells insulated, never short a pack.\u003c\/li\u003e\n  \u003cli\u003eSpot welding produces fume. Work in a ventilated area.\u003c\/li\u003e\n  \u003cli\u003e⚠️ \u003cstrong\u003eWARNING: Cancer — www.P65Warnings.ca.gov\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eAdditional Parts and Resources\u003c\/strong\u003e\u003cbr\u003e\nFor more battery rebuild supplies, cells, BMS boards, and nickel by the roll, visit our shop \u003cstrong\u003eRenewSpark\u003c\/strong\u003e. We also offer the \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e app, built to help DIY builders and professionals with calculators and utilities for battery rebuilding projects.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eDeWalt and FlexVolt are trademarks of their respective owners. This compatible product is independently manufactured and is not produced, sponsored, or endorsed by DeWalt.\u003c\/em\u003e\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47815207157987,"sku":"PC101","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/IMG_5354.jpg?v=1768254021"},{"product_id":"pre-cut-nickel-busbar-set-milwaukee-m18","title":"Pre-Cut Pure Nickel Busbar Set – Milwaukee M18 8.0Ah 21700 – 6 Pcs","description":"\u003ch2\u003ePre-Cut Pure Nickel Busbar Set for Milwaukee M18 8.0Ah (6 Pieces)\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eSix pure nickel busbars, cut to match the factory cell layout of the M18 8.0Ah pack. No measuring, no cutting, no guesswork.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eProduct Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Pure nickel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 0.25 mm — thicker than standard 0.15–0.2 mm strip, for lower resistance and less heat under load\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePiece count:\u003c\/strong\u003e 6 pieces per set\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCut to shape:\u003c\/strong\u003e Matched to the factory cell layout of the M18 8.0Ah pack\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCell format:\u003c\/strong\u003e 21700\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Brand new\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits Milwaukee M18 \u003cstrong\u003e8.0Ah\u003c\/strong\u003e packs built on 21700 cells\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDoes not fit\u003c\/strong\u003e M18 5.0Ah or 6.0Ah packs — those use 18650 cells and a different nickel layout\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDoes not fit\u003c\/strong\u003e M18 12.0Ah packs — different cell count and layout\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat Is Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e6 pre-cut pure nickel busbars — one complete set for a single M18 8.0Ah pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat Is Not Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBattery cells\u003c\/li\u003e\n  \u003cli\u003eBMS \/ control board\u003c\/li\u003e\n  \u003cli\u003eHousing, case, or hardware\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eAssembly Requirements\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSpot welding required\u003c\/li\u003e\n  \u003cli\u003ePure nickel at 0.25 mm needs more weld energy than thin plated strip — set your welder accordingly\u003c\/li\u003e\n  \u003cli\u003eExperience with lithium pack assembly recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Safety Information\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLithium battery work carries fire risk. Keep cells insulated, never short a pack.\u003c\/li\u003e\n  \u003cli\u003eSpot welding produces fume. Work in a ventilated area.\u003c\/li\u003e\n  \u003cli\u003e⚠️ \u003cstrong\u003eWARNING: Cancer — www.P65Warnings.ca.gov\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eShips from California — fast U.S. delivery.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAdditional Parts and Resources\u003c\/strong\u003e\u003cbr\u003e\nFor more battery rebuild supplies, cells, BMS boards, and nickel by the roll, visit our shop \u003cstrong\u003eRenewSpark\u003c\/strong\u003e. We also offer the \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e app, built to help DIY builders and professionals with calculators and utilities for battery rebuilding projects.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003eMilwaukee and M18 are trademarks of their respective owners. This compatible product is independently manufactured and is not produced, sponsored, or endorsed by Milwaukee.\u003c\/em\u003e\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47815385809123,"sku":"PC105","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/IMG_5355.jpg?v=1768260554"},{"product_id":"pre-cut-nickel-busbar-set-milwaukee-m18-12ah","title":"Pre-Cut Nickel Busbar Sheet Set for Milwaukee M18 12.0Ah Battery Rebuild","description":"\u003cp\u003e\u003cstrong\u003eProduct:\u003c\/strong\u003e Pre-Cut Nickel Busbar Sheet Set for Milwaukee M18 12.0Ah Battery Rebuild\u003c\/p\u003e\n\n\u003cp\u003eThis listing is for a complete \u003cstrong\u003epre-cut nickel sheet \/ busbar set\u003c\/strong\u003e designed for rebuilding or refurbishing \u003cstrong\u003eMilwaukee M18 battery packs\u003c\/strong\u003e commonly found in the \u003cstrong\u003e12.0Ah configuration\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThe nickel components are precision cut and shaped for battery pack assembly, making them suitable for experienced battery rebuilders, repair technicians, and professional refurbishing applications.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible With:\u003c\/strong\u003e Milwaukee M18 battery packs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTypical Capacity:\u003c\/strong\u003e 12.0Ah configuration\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Nickel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDesign:\u003c\/strong\u003e Pre-cut busbar \/ nickel sheet set\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUse Case:\u003c\/strong\u003e Battery rebuilds and repairs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Brand New\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIncluded:\u003c\/strong\u003e Nickel sheet \/ busbar set as shown\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Notes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBattery cells not included\u003c\/li\u003e\n  \u003cli\u003eSpot welding required\u003c\/li\u003e\n  \u003cli\u003eProfessional installation recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\nFor additional battery rebuild supplies, tools, and components, visit our shop \u003cstrong\u003eRenewSpark\u003c\/strong\u003e.\nWe also offer the \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e app, designed to help DIY builders and professionals\nwith calculators and utilities for battery rebuilding projects.\n\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47827055149283,"sku":"PC103","price":11.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/IMG_5376.jpg?v=1768410284"},{"product_id":"dewalt-dcb612-60v-rebuild-kit","title":"DeWalt FlexVolt DCB612 60V 12Ah Battery Rebuild Kit - 15x21700 (No Cells)","description":"\u003cp\u003e\u003cstrong\u003eProduct:\u003c\/strong\u003e DeWalt FlexVolt \u003cstrong\u003eDCB612 (60V \/ 12Ah)\u003c\/strong\u003e Battery Rebuild \u003cstrong\u003eComplete Kit\u003c\/strong\u003e for a \u003cstrong\u003e15×21700\u003c\/strong\u003e cell layout.\u003c\/p\u003e\n\n\u003cp\u003e\nThis complete rebuild kit is designed for rebuilding a DeWalt FlexVolt\n\u003cstrong\u003eDCB612\u003c\/strong\u003e battery pack that uses a \u003cstrong\u003e15-cell 21700 configuration\u003c\/strong\u003e.\nIt is ideal for DIY rebuilders who want a clean, accurate fit without cutting custom nickel strip.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThis is a compatible replacement kit.\u003c\/strong\u003e It is independently manufactured and is not an original DeWalt-branded product.\u003c\/p\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery Model:\u003c\/strong\u003e DeWalt FlexVolt \u003cstrong\u003eDCB612\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage Platform:\u003c\/strong\u003e FlexVolt 20V \/ 60V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCell Configuration:\u003c\/strong\u003e \u003cstrong\u003e15 × 21700\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eFits DeWalt FlexVolt tools and compatible chargers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eBattery housing \/ case\u003c\/li\u003e\n  \u003cli\u003eBMS \/ protection board\u003c\/li\u003e\n  \u003cli\u003ePre-cut nickel and busbar set for the \u003cstrong\u003eDCB612 15×21700 layout\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eContacts, springs, and assembly hardware as shown in the photos\u003c\/li\u003e\n  \u003cli\u003eCarefully packaged for safe shipping\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003ePlease review all product photos carefully to confirm the exact components included with this kit.\u003c\/p\u003e\n\n\u003ch3\u003eBattery Capacity\u003c\/h3\u003e\n\u003cp\u003e\nThe finished pack capacity depends on the 21700 cells you install. A 15-cell FlexVolt layout using matched 4,000mAh cells produces a pack of approximately 12Ah in 20V mode. Actual capacity, output current, and runtime depend on the cells selected and the quality of the assembly.\n\u003c\/p\u003e\n\n\u003ch3\u003eWhat Is Not Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e21700 lithium-ion cells\u003c\/strong\u003e — you supply your own\u003c\/li\u003e\n  \u003cli\u003eSpot welder\u003c\/li\u003e\n  \u003cli\u003eBattery charger\u003c\/li\u003e\n  \u003cli\u003ePower tool\u003c\/li\u003e\n  \u003cli\u003eBattery assembly service\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Notes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003eCells and tools are not included.\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003ePlease confirm your battery model is \u003cstrong\u003eDCB612\u003c\/strong\u003e before purchasing.\u003c\/li\u003e\n  \u003cli\u003eBattery assembly experience is required. Spot welding is strongly recommended.\u003c\/li\u003e\n  \u003cli\u003eUse only properly tested and closely matched cells. Do not mix cells of different brands, models, capacities, ages, or condition.\u003c\/li\u003e\n  \u003cli\u003eAlways verify cell orientation, polarity, insulation, and pack voltage before connecting to a tool or charger.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAdditional Parts and Resources\u003c\/h3\u003e\n\n\u003cp\u003e\nFor additional battery-building parts — 21700 cells, nickel strips, insulation rings, BMS boards, connectors, and other DIY battery supplies — visit \u003cstrong\u003eRenewSpark\u003c\/strong\u003e.\n\u003c\/p\u003e\n\n\u003cp\u003e\nFor helpful tools, calculators, layout planning, and technical information, download the \u003cstrong\u003eRenewSpark Tools app\u003c\/strong\u003e.\n\u003c\/p\u003e\n\n\u003cp\u003e\nIf you have any questions about compatibility or fitment, feel free to message me before ordering.\n\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDeWalt and FlexVolt are trademarks of their respective owner. This compatible product is independently manufactured and is not produced, sponsored, or endorsed by DeWalt.\u003c\/strong\u003e\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"Default Title","offer_id":47830309535971,"sku":"KT108","price":76.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/IMG_4921.jpg?v=1768433384"},{"product_id":"0-2mm-nickel-strip-roll-12mm","title":"0.2mm Pure Nickel Strip Roll – 25\/50 ft – 12mm Width – Battery Spot Welding","description":"\u003ch2\u003e0.2 mm Pure Nickel Strip Roll — 12 mm Width\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003ePure nickel strip on the roll. Cut it to whatever your pack needs.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eProduct Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Pure nickel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 0.2 mm (±0.01 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 12 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 25 ft or 50 ft — select above\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Brand new\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Uses\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSpot welding 18650, 21700, and 26650 lithium cells\u003c\/li\u003e\n  \u003cli\u003ePower tool battery rebuilds\u003c\/li\u003e\n  \u003cli\u003eE-bike and scooter pack builds\u003c\/li\u003e\n  \u003cli\u003eDIY battery packs and repairs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy a Roll Instead of Pre-Cuts\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCut only what you need — less waste\u003c\/li\u003e\n  \u003cli\u003eWorks with any pack layout, not just one model\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eAssembly Requirements\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSpot welding required — soldering is not recommended for high-current paths\u003c\/li\u003e\n  \u003cli\u003ePure nickel needs more weld energy than plated strip — set your welder accordingly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Safety Information\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLithium battery work carries fire risk. Keep cells insulated, never short a pack.\u003c\/li\u003e\n  \u003cli\u003eSpot welding produces fume. Work in a ventilated area.\u003c\/li\u003e\n  \u003cli\u003e⚠️ \u003cstrong\u003eWARNING: Cancer — www.P65Warnings.ca.gov\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eShips from California — fast U.S. delivery.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAdditional Parts and Resources\u003c\/strong\u003e\u003cbr\u003e\nFor more battery rebuild supplies, cells, BMS boards, and pre-cut nickel sets, visit our shop \u003cstrong\u003eRenewSpark\u003c\/strong\u003e. We also offer the \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e app, built to help DIY builders and professionals with calculators and utilities for battery rebuilding projects.\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"25 ft","offer_id":47832459837667,"sku":"NR103","price":18.99,"currency_code":"USD","in_stock":true},{"title":"50 ft","offer_id":47832459870435,"sku":"NR104","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/0-2-mm-pure-nickel-strip-roll-10-ft-25-50-width-for-battery-pack-spot-welding-997.png?v=1760745384"},{"product_id":"0-2mm-nickel-strip-roll-15mm","title":"0.2mm Pure Nickel Strip Roll – 25\/50 ft – 15mm Width – Battery Spot Welding","description":"\u003ch2\u003e0.2 mm Pure Nickel Strip Roll — 15 mm Width\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003ePure nickel strip on the roll. Cut it to whatever your pack needs.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eProduct Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Pure nickel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 0.2 mm (±0.01 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 15 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 25 ft or 50 ft — select above\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Brand new\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Uses\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSpot welding 18650, 21700, and 26650 lithium cells\u003c\/li\u003e\n  \u003cli\u003ePower tool battery rebuilds\u003c\/li\u003e\n  \u003cli\u003eE-bike and scooter pack builds\u003c\/li\u003e\n  \u003cli\u003eDIY battery packs and repairs\u003c\/li\u003e\n  \u003cli\u003eWider strip suits parallel groups and higher-current runs\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy a Roll Instead of Pre-Cuts\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCut only what you need — less waste\u003c\/li\u003e\n  \u003cli\u003eWorks with any pack layout, not just one model\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eAssembly Requirements\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSpot welding required — soldering is not recommended for high-current paths\u003c\/li\u003e\n  \u003cli\u003ePure nickel needs more weld energy than plated strip — set your welder accordingly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Safety Information\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLithium battery work carries fire risk. Keep cells insulated, never short a pack.\u003c\/li\u003e\n  \u003cli\u003eSpot welding produces fume. Work in a ventilated area.\u003c\/li\u003e\n  \u003cli\u003e⚠️ \u003cstrong\u003eWARNING: Cancer — www.P65Warnings.ca.gov\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eShips from California — fast U.S. delivery.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAdditional Parts and Resources\u003c\/strong\u003e\u003cbr\u003e\nFor more battery rebuild supplies, cells, BMS boards, and pre-cut nickel sets, visit our shop \u003cstrong\u003eRenewSpark\u003c\/strong\u003e. We also offer the \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e app, built to help DIY builders and professionals with calculators and utilities for battery rebuilding projects.\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"25 ft","offer_id":47832514035939,"sku":"NR105","price":19.99,"currency_code":"USD","in_stock":false},{"title":"50 ft","offer_id":47832514068707,"sku":"NR106","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/0-2-mm-pure-nickel-strip-roll-10-ft-25-50-width-for-battery-pack-spot-welding-997.png?v=1760745384"},{"product_id":"0-15mm-nickel-strip-roll-8mm","title":"0.15mm Pure Nickel Strip Roll – 25\/50 ft – 8mm Width – Battery Spot Welding","description":"\u003ch2\u003e0.15 mm Pure Nickel Strip Roll — 8 mm Width\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003ePure nickel strip on the roll. Cut it to whatever your pack needs.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eProduct Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Pure nickel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 0.15 mm (±0.01 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 8 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 25 ft or 50 ft — select above\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Brand new\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Uses\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSpot welding 18650, 21700, and 26650 lithium cells\u003c\/li\u003e\n  \u003cli\u003ePower tool battery rebuilds\u003c\/li\u003e\n  \u003cli\u003eE-bike and scooter pack builds\u003c\/li\u003e\n  \u003cli\u003eDIY battery packs and repairs\u003c\/li\u003e\n  \u003cli\u003eThinner gauge welds easily on lower-power spot welders\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy a Roll Instead of Pre-Cuts\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCut only what you need — less waste\u003c\/li\u003e\n  \u003cli\u003eWorks with any pack layout, not just one model\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eAssembly Requirements\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSpot welding required — soldering is not recommended for high-current paths\u003c\/li\u003e\n  \u003cli\u003ePure nickel needs more weld energy than plated strip — set your welder accordingly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Safety Information\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLithium battery work carries fire risk. Keep cells insulated, never short a pack.\u003c\/li\u003e\n  \u003cli\u003eSpot welding produces fume. Work in a ventilated area.\u003c\/li\u003e\n  \u003cli\u003e⚠️ \u003cstrong\u003eWARNING: Cancer — www.P65Warnings.ca.gov\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eShips from California — fast U.S. delivery.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eAdditional Parts and Resources\u003c\/strong\u003e\u003cbr\u003e\nFor more battery rebuild supplies, cells, BMS boards, and pre-cut nickel sets, visit our shop \u003cstrong\u003eRenewSpark\u003c\/strong\u003e. We also offer the \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e app, built to help DIY builders and professionals with calculators and utilities for battery rebuilding projects.\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"25 ft","offer_id":47832658575587,"sku":"NR107","price":12.99,"currency_code":"USD","in_stock":true},{"title":"50 ft","offer_id":47832658608355,"sku":"NR108","price":20.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/0-2-mm-pure-nickel-strip-roll-10-ft-25-50-width-for-battery-pack-spot-welding-997.png?v=1760745384"},{"product_id":"0-15mm-nickel-strip-roll-10mm","title":"0.15mm Pure Nickel Strip Roll – 25\/50 ft – 10mm Width – Battery Spot Welding","description":"\u003ch2\u003e0.15 mm Pure Nickel Strip Roll — 10 mm Width\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003ePure nickel strip on the roll. Cut it to whatever your pack needs.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eProduct Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Pure nickel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThickness:\u003c\/strong\u003e 0.15 mm (±0.01 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 10 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 25 ft or 50 ft — select above\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Brand new\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Uses\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSpot welding 18650, 21700, and 26650 lithium cells\u003c\/li\u003e\n  \u003cli\u003ePower tool battery rebuilds\u003c\/li\u003e\n  \u003cli\u003eE-bike and scooter pack builds\u003c\/li\u003e\n  \u003cli\u003eDIY battery packs and repairs\u003c\/li\u003e\n  \u003cli\u003eThinner gauge welds easily on lower-power spot welders\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy a Roll Instead of Pre-Cuts\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCut only what you need — less waste\u003c\/li\u003e\n  \u003cli\u003eWorks with any pack layout, not just one model\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eAssembly Requirements\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSpot welding required — soldering is not recommended for high-current paths\u003c\/li\u003e\n  \u003cli\u003ePure nickel needs more weld energy than plated strip — set your welder accordingly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eImportant Safety Information\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLithium battery work carries fire risk. 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We also offer the \u003cstrong\u003eRenewSpark Tools\u003c\/strong\u003e app, built to help DIY builders and professionals with calculators and utilities for battery rebuilding projects.\u003c\/p\u003e","brand":"RenewSpark","offers":[{"title":"25 ft","offer_id":47832764383459,"sku":"NR109","price":14.99,"currency_code":"USD","in_stock":false},{"title":"50 ft","offer_id":47832764416227,"sku":"NR110","price":22.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/0-2-mm-pure-nickel-strip-roll-10-ft-25-50-width-for-battery-pack-spot-welding-997.png?v=1760745384"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/collections\/IMG-0736.png?v=1756564722","url":"https:\/\/renewspark.com\/collections\/all-products.oembed?page=3","provider":"RenewSpark","version":"1.0","type":"link"}