Portable external lithium battery use for charging iPhone and iPod MP3. volume: 1000 mAh, 2 hours charging 90% battery  100% Brand New and High Quality .  Easy to take: smart volum and it is very light.  Easy to charge: Connect your Iphone to this power station,and use your data cable to connect this station and the computer.  Color: Black.  This item can be used as an emergency battery when you are in vehicle,any situation that you can't charge your Phone.  When you need to charge this backup battery just using Cable connect it to computer or AC charger.  Note:You can not charge the phone and the battery at the same time. Specification: Battery type: Lithium-ion battery  Dimension:61x53x12.5(mm)  Weight:48g  Capacity:1000mAh  Input: 5V 500mA  Output: 5V 400mA max  Charge time: 2 hours.Compatible with:Phone 3G 8GB 16GBiPhone 4GB 8GB (2G Version)

Portable Charger use for iPhone 3G and iPod MP3