Smart Backup Battery extends iPhone 3G's capacity

Though the iPhone 3G offers faster connections over 3G networks, it sacrifices battery life to do so. The Smart Backup Battery can double battery capacity for owners of the new iPhone. The external aluminum-cased lithium-ion battery attaches to the data-port at the base of the iPhone to charge the iPhone's battery. It can be used to charge while th... » Full Story on MacNN.com