Until everlasting batteries hit the market, we'll constantly be looking for ways to enhance battery longevity. Now you can wear your power jones on your sleeve (or just under it) with the $25 Wrist Band Battery, carrying enough juice to power just about any handheld for a good long while, as long as one of the seven included connector tips fits.
After charging for five hours in a USB port, the Wrist Band Battery is ready for action, but we're not sure if we'd want to wear it around all the time just in case of battery depletion. If it were a bit thinner, and used magic wireless electronic resonance to send power rather than that curly cord, now that would be something. But then that would probably cost a thousand dollars and be available five years from now.