... , practical, safe and convenient several major features.For iPhone 3G, iPhone 3GS, iPhone 4G, iPod,iPad1,iPad2.Battery head design with a ... lithium-ion battery (1200mAh), battery power sustainable for the iPhone, and have perfect protection circuit, which can effectively prevent ... 2) The battery pack through the USB cable contact the original iPhone AC adapter or USB interface on PC equipment.2. ...