I have a 1st gen ipod touch which i haven't been using much recently. I have just started using it again and the battery has been acting a bit strange. It will drain, and then when i plug it in to charge it will show 3 quarters full almost immediately. Why is it doing this? Is the battery on it's way out? Yesterday it was on 3 quarters charge, and then all of a sudden went down to 20%. Today after a few hours charge it lasted for 8 hours playing music. Thanks for the help.