3200mAh Extended Flip Battery Charger Case Backup Power Bank with Kick Stand for HTC ONE M7 Unique fashionable 3200mAh Backup External Battery Charger Power Pack Case for HTC One,with sliding design. Charging / sync, simply plug in the USB turn micro USB to the micro USB female dock, connect the USB to a powered USB equipment or computer. Totally cover and protect your phone from slipping. High capacity external Battery Charger-doubles stand-by time for your phone. Cut out for all the phone features-use your phone without removing it from the case. Protective IC circuit-efficiently avoid short-circuits, over-charging, over-discharging and malfunctioning even under extreme conditions.