Does anyone know of a relatively cheap wind up iphone charger? Recetnly the car charger I own, when I plug it in, says "This accessory is not recognized by your iphone". I can charge it, but I can't listen to any music while it's charging. This is mostly the reason to have it charging while driving in the first place, because I want to listen to music! Anyway I'm thinking either a wind up one or - perhaps - a solar one would be fine. I don't mind doing a lot of winding, I just want it to charge while listening to music, and I like the idea of not being "tethered" to an outlet, be it AC or cig lighter. Thanks for your help!