Compatibility: iPhone 1st Generation, iPhone 3G (8GB, 16GB), iPhone 3GS (16GB, 32 GB) Extended Battery: 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 & Sync: Charge and sync iPhone 3G 3GS with iTunes without removing it from the Power [...]