Specifications:
3-in-1 design, protective cover, backup battery and USB data transmission functions.
 ◆Changeable Q-Power rechargeable battery.
 ◆High capacity battery increases working time between charges.
 ◆ Built-in USB cable for data transmission to PC.
 ◆ Fashionable design that integrates well with the iPhone3G.
 ◆ Smart chip technology that prevents over charging, over discharge and short circuits.