Rechargeable 2200mAh External Battery Back Case for Samsung Galaxy S II i9100 - Black
Color: Black - Material: ABS plastic - Built-in rechargeable 3.7V 2200mAh battery - Input: DC 5V 500mA - Output: DC 5V 750mA - 4 blue LED indicators - Extends cell phone working time - Also provides best protection for your device from scratches dust and shock - Comes with USB cable (73cm) and Chinese / English user manual