Travel all over the world and not have to worry about that iphone dying! The P-Flip Foldable Solar Power Dock has a built-in lithium battery (with life indicator) that can be charged via the solar panel or with the included USB cable.
It delivers an impressive 15 hours of video, 8 hours of talk time, and 60 hours of audio, yet weighs just 3 oz! Compatible with iPhone 3G and 3GS.
$79 @ Magellans