My father has an 80GB 5.5G iPod. He transfers music to it, unplugs it (after the indicator says the battery is full), and finds that it has no remaining battery charge. Somehow the iPod either does not charge while transferring music, or has a faulty battery, or it is just a figment of his imagination. Right now, he's playing music off the iPod, and it is timing its own battery life to see how long it lasts. Has anyone else encountered this same problem?