Incipio 2 Port Universal Backup Battery Charger (Micro & Mini USB) (PW-109) The offGRID 1-Port rechargeable backup battery is so small that is fits in the palm of your hand. Charge it up, take it on the road, and power your products on the go via the provided mini or micro USB cables. Easy to use. 2 USB ports allows 2 devices to be chared at the same time Compact with foldable prongs-convenient for storage and travel Includes on/off button to store battery power Hi-capacity rechargeable lithium polyer ion battery Charges your device and battery at the same time