Compatible with: iPhone 1st Generation, iPhone 3G (8GB, 16GB), iPhone 3GS (16GB, 32 GB)
Doubles battery life of iPhone 3G 3GS-provides up to 8 additional hours of talk time and 30 additional hours of music playback time
Charge and sync iPhone 3G 3GS with iTunes without removing it from the Power Pack
Smart battery technology drains battery of the Power Pack first before switching to the iPhone's battery
Convenient rechargeable battery allowing you to always have a battery charging backup when you are away from a AC outlet
