{"product_id":"milwaukee-m18-10-cell-21700-battery-rebuild-kit","title":"Milwaukee M18 18V Battery Rebuild Kit – 10-Cell 21700, 5S2P BMS \u0026 Nickel – No Cells","description":"\u003ch2\u003eMilwaukee M18 18V Battery Rebuild Kit – 10-Cell 21700, 5S2P\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eRebuild a compatible Milwaukee M18 18V battery pack using ten 21700 lithium-ion cells.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis DIY battery rebuild kit includes the battery housing, battery management circuit board, 0.25 mm conductive nickel components, battery contacts, battery-level indicator parts, springs, screws, and the other internal components shown in the product photos.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBattery cells are not included.\u003c\/strong\u003e This kit is intended for experienced battery builders who will supply, test, match, install, and spot-weld their own 21700 lithium-ion cells.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eThis is a battery rebuild kit.\u003c\/strong\u003e It is designed for rebuilding a compatible Milwaukee M18-style battery pack using a 10-cell 21700 configuration.\u003c\/p\u003e\n\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCompatible with Milwaukee M18 18V tools and compatible chargers\u003c\/li\u003e\n  \u003cli\u003eDesigned for ten 21700 lithium-ion cells\u003c\/li\u003e\n  \u003cli\u003e10-cell, 5S2P battery configuration\u003c\/li\u003e\n  \u003cli\u003eIncludes battery management circuit board\u003c\/li\u003e\n  \u003cli\u003eIncludes 0.25 mm conductive nickel components\u003c\/li\u003e\n  \u003cli\u003eIncludes battery housing and electrical contacts\u003c\/li\u003e\n  \u003cli\u003eIncludes battery-level indicator components\u003c\/li\u003e\n  \u003cli\u003eIncludes springs, screws, and assembly hardware\u003c\/li\u003e\n  \u003cli\u003eFinished capacity depends on the cells selected\u003c\/li\u003e\n  \u003cli\u003eBattery cells are not included\u003c\/li\u003e\n  \u003cli\u003eAssembly service is not included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eBattery Capacity\u003c\/h3\u003e\n\n\u003cp\u003eThis kit uses a 5S2P configuration. The completed battery capacity will be approximately twice the rated capacity of each individual 21700 cell used.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eUsing ten matched 4,000mAh cells may produce approximately 8.0Ah\u003c\/li\u003e\n  \u003cli\u003eUsing ten matched 4,500mAh cells may produce approximately 9.0Ah\u003c\/li\u003e\n  \u003cli\u003eUsing ten matched 5,000mAh cells may produce approximately 10.0Ah\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eActual capacity, current capability, runtime, and performance depend on the cells selected, cell condition, and quality of assembly.\u003c\/p\u003e\n\n\u003ch3\u003eWhat Is Included\u003c\/h3\u003e\n\n\u003cp\u003eThe kit includes the battery housing, BMS circuit board, 0.25 mm conductive nickel components, electrical contacts, battery-level indicator components, springs, screws, and the other parts shown in the product photos.\u003c\/p\u003e\n\n\u003cp\u003ePlease review all product photos carefully to confirm the exact components included.\u003c\/p\u003e\n\n\u003ch3\u003eWhat Is Not Included\u003c\/h3\u003e\n\n\u003cul\u003e\n  \u003cli\u003e21700 lithium-ion cells\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\u003eAssembly Requirements\u003c\/h3\u003e\n\n\u003cp\u003eThis product is intended for experienced users familiar with lithium-ion battery construction, cell testing, cell matching, insulation, polarity, series and parallel connections, BMS installation, and spot welding.\u003c\/p\u003e\n\n\u003cp\u003eThe buyer is responsible for selecting suitable high-drain 21700 cells with the correct voltage, capacity, chemistry, discharge rating, and specifications for the intended application.\u003c\/p\u003e\n\n\u003cp\u003eUse only properly tested and closely matched cells. Do not mix cells of different brands, models, capacities, ages, voltage levels, chemistry, or condition.\u003c\/p\u003e\n\n\u003ch3\u003eImportant Safety Information\u003c\/h3\u003e\n\n\u003cp\u003eImproper lithium-ion battery assembly can cause fire, personal injury, equipment damage, or property damage. Proper tools, insulation, testing equipment, safety procedures, and battery-building experience are required.\u003c\/p\u003e\n\n\u003cp\u003eAlways verify cell orientation, polarity, nickel placement, insulation, wiring, pack voltage, and output voltage before connecting the completed battery to a tool or charger.\u003c\/p\u003e\n\n\u003ch3\u003eAdditional Parts and Resources\u003c\/h3\u003e\n\n\u003cp\u003eFor additional battery-building parts, 21700 cells, conductive materials, connectors, cell holders, and BMS boards, 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\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":49415789969635,"sku":"MIL-M18-21700-10C-RBK","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/7594\/8771\/files\/IMG_7608.jpg?v=1784210469","url":"https:\/\/renewspark.com\/products\/milwaukee-m18-10-cell-21700-battery-rebuild-kit","provider":"RenewSpark","version":"1.0","type":"link"}