i.Sound Back Up Battery 2-in-1 (up to 30-hours of additional battery life) made for iPhone, iPhone 3G, iTouch & iPod

The 2-in-1 Charger & Back Up Battery is compatible with all iPhone and iPod Models with a 30 pin connector. This high capacity 1000mAh polymerized lithiumion battery provides up to 30 hours of additional music, 6 hours of video or 3 hours of talk time in a small and sleek design. It also includes a USB charging cable and USB AC adapter for recharging convenience. The 2-in-1 Charger & Back Up Battery is perfect for iPhones and iPods on the go