Mophie Juice Pack Powerstation
Mophie's made a name for their Juice Pack cases, but if the use of your iPhone demands lots of reserve power, the Powerstation is well worth a look. It packs enough electricity to fill up a dead iPhone several times over, and then some. It's also designed to charge quickly and to deliver its charge just as quickly. In fact, it's on par with the speed that the stock iPad charger we just mentioned. It's also extremely flexible as well rather than using Apple's proprietary 30 pin connector, it uses a standard USB connection. This means anything that charges from a USB port, from Bluetooth headsets to iPhones to iPads to, yes, Android phones (shudder), can use the Powerstation in a pinch. At less than five ounces, it's a negligible addition to a laptop bag.