myPower for iPhone is an iPhone battery wrapped in an elegant leather sleeve. This lithium polymer battery/case doubles the run time of the iPhone battery by powering the connected iPhone on the go. When plugged into a USB power adapter or port, myPower for iPhone will charge its internal battery, and that of a connected iPhone. myPower for iPhone also serves as a dock for iPhone, enabling the device to automatically sync with a connected computer while docked. This lightweight device includes a capacity indicator. myPower for iPhone is "Works with iPhone" certified and works with iPhone and iPhone 3G. myPower for iPhone also works with iPod touch 2G, iPod classic 80GB and 120GB, and iPod video 30GB.