21700 Li ion Battery Plastic Case with Charging PCB Protective Board for DIY Power Bank Safe Storage Holder Organizer

This is not an original part; 100% brand new. Note: No battery cells included!!!!! The battery case fits 21700 cells, not for 18650 type—please ensure compatibility. The item is purely a shell without any inner battery core. Ideal for repairing or assembling battery packs, only recommended for individuals with experience in battery pack assembly and understanding of battery properties. Again, this is only a plastic housing—no battery is supplied inside. Assembly preparation: (1) For use with new cells: a. Ensure to pick 21700 power lithium cells, b. Set 10 cells together, using resistance and capacitance to balance all voltages. (2) For refurbished use, examine the voltage at both ends of each battery; if varied, charge each individually until voltage is equal across all. Crucial: Match the voltage for every cell before attaching the PCB. Product Details: Construction: Plastic + Metal Size: 4.33*2.95*2.75 inches / 11*7.5*7cm Color: Black Package: 1 complete set Reminders: 1. Photo sizing is illustrative—refer to listing for exact size. 2. Manual measurement may bring slight differences. 3. Colors in images could vary from the real item due to different display settings. The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom's policies and EU Product Safety and Compliance laws.