mophie Juice Pack Air for iPhone

The mophie Juice Pack Air is a rechargeable external battery concealed inside of a protective form-fitting case for the iPhone 3G. It offers you the full protection of a hard-shell case while providing almost twice the battery life of the iPhone alone. Its ultra-thin, lightweight, low-profile design houses a rechargeable 1200mAh lithium polymer battery for up to 270 hours standby time. The case allows USB charging and sync with iTunes as well as full protection for your iPhone 3G. Features Twice the battery power Easy-grip soft-touch case Simultaneous charging of iPhone and Juice Pack Rechargeable 1200mAh lithium polymer battery Pass-through USB charging and sync with iTunes Extended smart battery and full case protection On/Off switch offers choice of battery or case Integrated 4 LED charge status indicator