If you’re always seeking more battery power like me, there’s a case out that gives you an extended battery as well as providing a hard case for your iPhone called the Mophie Juice Pack. Mophie claim they have the “The world’s thinnest rechargeable battery case for iPhone 3G & iPhone 3GS.”
The juice pack air™ is available exclusively through mophie.com and Apple stores world-wide. This is the first Apple certified “Works With iPhone 3G(S)” attached battery in the world!
Charging
You can use the included USB cable to charge the juice pack air™ and iPhone simultaneously or charge the juice pack air™ on its own.
For me this looks like an attractive solution, the real downside is almost doubling the depth of the iPhone which makes it less appealing. For now I’ll probably stick with my Philips SCE4403 chargers that I can easily place in my Pocket and whip out at a moments notice and still have the streamlined case of the iPhone.
More information can be found at http://www.mophie.com/product-p/1059_jpa-ip3g-blk.htm
