Reboot due to incorrect battery meter...

I am having a problem with my 3rd Gen iPod.
I charge the battery fully. After 1 - 2 hours of playing the iPod, the battery meter will show about 1/4 of a charge left.
Once the battery meter shows 1/4 power left, at any point, playing a song, skipping to a new track etc, the iPod will shutdown with the battery warning indicator.
If I then let it sit for a minitue and turn the iPod back on, the battery meter will display empty, but then it will slowly return to about 1/4 full again after about a min. From this point on, I can get about another hour out of it.
It seems to be a calibration issue but I don't know how to fix it. Any suggestions are welcome!

If the battery was dead when you received it, a complete charge should take four hours or so. Even if the battery meter shows fully charged, you should make sure that your iPod stays plugged in for the duration.
Battery meters often display this behavior - try charging your cell phone for 15 minutes - you'll likely see the same thing.

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