Eton Mobius Case : Rechargeable Battery Case with Solar Panel for your iPhone 4
Eton a company based in Palo Alto has a large number of solar powered devices, and one of their products are Mobius, a case that can be used to recharge your Iphone 4 battery with solar power, and once in the sun, Mobius will immediately start charging. But If you don’t want to leave your iPhone sitting out in the sun, you can also remove the pack and charge it up separately.
Eton Mobius equipped with a large enhanced Monocrystal solar panel on the back which is nearly the same size as the iPhone itself which means it does not make your iPhone look like a brick. there is also LED indicator that will show you how much power is left and in addition to using solar power you can also recharge using micro USB cable.
For one hour in the sun, you will get 25 minutes of talk time, 20 minutes for 3G internet, 35 minutes for video playback and 145 minutes for audio playback. is more than enough I guess if used during an emergency. Well, Are you interested? You can get the Eton Mobius iPhone Case for $80 through amazon.