The battery status is initially red & nearly colorless. When I plug in the USB cable for charging, the battery status is showing that it is charging. But after a few minutes, it said that it is fully charged. Then I plug it off, the battery status still show me red & nearly colorless, but I can still use it for 3/2 Hours. I've tried for a few days and the situation never improve!! Could anyone tell me what is the problem?

I haven't use the iPod Video for a year as it gets wet a year before. I can't turn on at that time, but I can turn it on a few days ago.

I would appreciate if anyone can help me. Thanks!!!!