{"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","url":"https:\/\/renewspark.com\/products\/18650-mini-tube-power-bank-kit","provider":"RenewSpark","version":"1.0","type":"link"}