External Battery Pack for 3GS iPhone,you can charge anytime, anywhere;it is with higher 1900mah capacity.

Compatible: 3G/3Gs iPhone Free USB charging and data transmission 4 LED shows charging status High-quality Li-polymer cell Capacity: 1,900mA /3.7V Colors: black MaterialABS+PC Compatible with iPhone 3G DATA transmission CE

battery for iphone 3g