The Gadget: The Mophie Juice Pack battery extender for the iPhone 3G snugly wraps around your phone and claims to more than double the available power.
Mophie's wraparound battery extenders for the first iPhone provided some relief to incessant browsers and movie-watchers, and they're looking to adapt their "Juice Pack" to the even more anemic iPhone 3G. What does this pack offer that the others don't? A mini USB port for syncing and charging and Apple's coveted…
If that 3.5-hour playback time of the 30GB iPod or 6.5 hour playback of the 80GB model isn't going to be enough for you, here's the Sonnettech Volta Rechargeable Battery Pack, claiming "up to" (we're always wary of those two weasel words) 16 hours of video playback on a single 5.5 hour charge.