Kensington K39264US Travel Battery Pack and Charger for iPhone and iPod touch Built-in dock connector to charge your iPhone and flip-out USB tip to recharge without the mess of extra cables Extends play time up to 23 hours music, up to 7 hours of video and up to 5 hours of talk time LED battery gauge displays remaining battery pack power level Perfect for long flights and small travel bags 1A power for fast charging of your iPhone, including iPhone 4