The Case-Mate iPhone 3G FUEL. It's a protective case, carrying solution, and extended battery life all in one. So from here on out you're good to charge on the go. So the next time you're rushing to get to the airport at 6am and you forget your charger...relax, your iPhone 3G is taken care of.
If you've ever drained your cell phone's battery in a single day (something that's easy to do if you have an iPhone ), you'll appreciate the new Fuel cases from Case-Mate. They provide extra significant charge, and they have one BIG advantage: they have belt clips.
The Fuel for iPhone 3G delivers up to 9 additional hours of talk time or 7 hours of Internet use. They have racheting 180-degree belt clips.