I am planning to travel to remote areas in Africa where I won't have access to electricity. I got this mini solar panel that charges AA batteries, cell phones, and supposedly iPods, but when I plug my iPod nano to the USB outlet, it shows that it is charging for about a minute and then it turns off automatically and won't charge anymore. Does anyone have any idea if I can solve this, or otherwise what are other options to keep an iPod running without access to electricity? THANKS!!!