IMAGE Portable White 2200mAh Backup Battery Power Charger Protective Case Cover For Samsung Galaxy S2 II i9100(Not fit for SPRINT Epic Touch 4G/T-Mobile Version/Virgin Mobile D710) Designed to provide external power for samsung i9100. It can also work as a protective case, form-fitting, ultra-thin, light-weight. Rubberized coating ensure the good quality and gives you a good touch feelin. Built-in 2200mAh high capacity rechargeable Li-Ion battery. Charging/ sync, simple plug in the USB, turn micro USB female dock, connect the USB to a powered USB equipment or computer. Track battery power status at a glance with an integrated 4-light LED status indicator. Indicates charging mode and current battery life. Package Include: 1 x Black Backup Battery Case for Samsung Galaxy S2 SII i9100