I have an iBook G4 and an iAudio F1 mp3 player. The mp3 player is charged by hooking it up to the computer's usb port. Then the mp3 player charges from the computer. Before I had my iBook, i charged it using the desktop. Now I charge it with my iBook. I was just wondering if this was bad for the iBook's battery? I usually have the power cord plugged into the iBook and wall when I'm charging my mp3 player.