4 Slots 21700 Battery Power Shell Charger Box LCD Display Power Bank DIY Case v

Can be installed 4x flat 21700 lithium battery(battery not included). 1x 21700 Power Bank Case(Batteries not included). DIY Flat Belt Screw Leather Craft Chicago Nail Brass Solid Rivets Stud Head I. The power bank case needs to be welded with batteries in parallel.

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