Harness the power. The power of the sun! The You've Got the Power Solar iPhone Charger
($38) is a nifty little device on a key chain that, you guessed it, charges your iPhone or iPad on the go. The built in solar panel uses green energy to charge its own battery, which can then be used to charge the battery on your device. We think it should have come prettier colors, but hey, if it keeps our music playing, we'll definitely settle.