Fenzer White Micro USB Data Sync Charger Cable Portable Battery Extender for Casio Hitachi C751 C871 C811 GzOne Ravine 2 Commando 4G LTE Windows Phone Fenzer White Micro USB Data Sync Charger Cable Portable Battery Extender for Casio Hitachi C751 C871 C811 GzOne Ravine 2 Commando 4G LTE Windows Phone Built in IC chip to protect against overcharging Charges battery and provides backup power USB Port and built in LED flashlight Uses two AA batteries (batteries not included)