i just bought my 4gen iPod a week ago and used it twice. the last time i used it was 2 days ago when i went to the gym and before that i had the battery fully charged. i love it, the iPod works like a charm on the treadmill. anyways, i used it for 1 hour to 1.5 hours at full blast. now, 5 mintues ago i was about to leave for the gym again but what.... dead battery! Apple states the battery life is for 12 hours, and i assume thats under optimal conditions but 1 hour in my case? is this right?