- The ipod display registers an empty battery when there is really about 3 hours of play time left.
- The battery meter registers "full" when the battery isn't. This leads to playback times that are a lot less than the device is capable of.
Anyway, a few websites suggested that ipods have to be re-calibrated every few months to maintain a decent amount of playback off your battery. It'd be nice if they included some of this stuff in the manual.