BB Cartridge Concealing Battery

The BBtank is a device for people who want a sleek designed battery with stealth and concealment in mind. This 350mAh battery fits inconspicuously on your keychain and is ready at a flip of a switch. Some of our favorite features of the BBtank is the additional protection of the cartridge when the cartridge is concealed, built in usb charger, and rugged build quality.

via Gfycat

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