Auxiliary Battery Power Station for iPod, iPhone 4, 3G, 3Gs: Connect your Iphone to this power station,and use your data cable to connect this station and the computer. This product can be used as an emergency battery when you are in vehicle,any situation that you can't charge your Phone.

Specification:
Battery type: Lithium-ion batterty                     
Dimension:62x52x12(mm)
Weight:40g
Capacity:1000mAh
Input:5v 500mA
Output:5v 500mA
Charge time: around 2.5 hours