updated 01:25 pm EDT, Thu July 17, 2008
Battery charges iPhone 3g
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 the phone is in operation and will charge first the iPhone, then itself, in sequence when attached to AC power. The Smart Backup Battery also works with the original iPhone, iPod touch and all other data-port iPods. It costs $50, with discounts on volume purchases.
The charger comes with both a USB-adapter and an AC wall-adapter. It has LED charging status indicators and overcharging protection technology. The lithium-ion battery is rated at 1200mAh and weighs less than two ounces.