Case-Mate has announced the iPhone 3G Fuel Rechargeable Battery Pack, a protective case, carrying solution, and extended battery all in one.
Extended Battery Life Features - Talk time: up to 9 additional hours beyond standard iPhone 3G battery life - Internet use: up to 7 additional hours beyond standard iPhone 3G battery life - Video playback: up to 8 additional hours beyond standard iPhone 3G battery life - Audio playback: up to 24 additional hours beyond standard iPhone 3G battery life - Stand by time: up to 250 additional hours beyond standard iPhone 3G battery life
Additional Features - Power on/off button makes more efficient usage of the fuel by only engaging when you decide to - Rechargeable through a standard 5-pin usb cable (included) - Fully supports syncing while iPhone 3G is docked in the fuel - Fully ratcheting 180-degree belt clip - Easy slide in/out access to your iPhone 3G
The case is available now from Case-Mate for $79.99.