4300mAh Extension Battery with White Back Cover or with Blue Back Cover

This extension battery is for you to keep as an extra power source for you cell phone.Chargering and 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.

Feature:
# Expect to Approx. Double your talk and standby time
# Extended battery as a case for you to keep as an extra power source handy
# Case with battery charger that nearly doubles the life of your battery for your cell phone device.
# This battery case is guaranteed to be compatible and work with your cell phone.