About two days ago I started using my iPod mini after not using it for a couple days (I was moving into school) and it worked fine at first. But after using it for about 20 minutes it said the battery was low and to connect it to a power source, even thought there was about 3/4 of a charge in the battery. So I restarted it by holding down the select and menu button, and low and behold it did it again a few minutes later. So I connected it to my iMac and restored the firmware, version 1.4, hoping that maybe it was just a software error. But even after a fresh install and a full charge through the AC adapter, it still would say it had no charge and shut down after just a few minutes of use. Not amount of software restores or charging seems to be working two days after the problem initially showed up. What should I do? Should I have it repaired ( I bought it last July (2004) so its out of the standard warrantee), or should I just buy a new one?