When it comes to charging your iPhone, iPod or iPad, you really should accept no substitutes. As most case manufacturers use the Apple cable as a reference, the cutouts for the dock connector port are designed for this cable. And unlike with some other, non-genuine alternatives, you'll never be told this charger is incompatible with your device.
Apple iPad, iPad 2, iPad 3
Apple iPhone 2G, iPhone 3G, iPhone 3GS, iPhone 4, iPhone 4S
Apple iPod Touch, iPod Classic, iPod Mini, iPod Nano