The Monoprice Backup Battery Pack is an iPhone/iPod power accessory with a capacity of 2200 mAh, about twice that of the iPhone. Simply plug the dongle in to charge up a drained iPhone up to two times. The accessory, which is rated for a charge time of 3.5 hours, is compatible with the iPod touch, iPod Classic, iPod nano, iPhone, iPhone 3G, etc. It measures 62 x 68 x 16 millimeters and weighs 68 grams. At $14.50, the Backup Battery Pack's price is (perhaps) its best attribute of all, as the peripheral is considerably cheaper than other similar solutions. Check out a review of the Monoprice here at tuaw.