so I just turned on my ipod and it was a complete charge yesterday of 100% and I go to turn it on and its at 8% wtf. I was wondering why it did this and if my battery might need replacing maybe its getting old? I've had my ipod for about 2 years now. I have the ipod touch 1st gen, 3.0 firmware. I don't mind charging it up but just curious as why it did this???