The Datapal External Battery can extend your phone or iPod touch or nano, 3rd generation, for additional play of up to 30 hours of music, 6 hrs. of video, or 3 hrs. of talk time. The device has an LED working status indicator and a built-in 1900mAH rechargeable Li-On battery that connects through Apple’s fast port. Recharge with included USB cord in about 3 hours. At a size of 70 x 62 x 12.5mm and a weight of 54.5g, the battery is available for $30.99.