Compact 12v/5v litium ion battery powers your BangBox, and anything else that's USB. Comes with charger and power cable.
(side note, these will also power Milwaukee sweaters and jackets)
Do not use the 12V lithium battery pack in places with high humidity or where it may be exposed to wet. Do not modify or disassemble the power bank. Do not throw the power bank into fire or water. Do not place the power bank during charging on flammbable materials such as in the bed or carpets