My battery doesnt seem to be holding a charge anymore. I can charge it fine with my pc and the wall adapter and it shows it's fully charged because the little battery stops moving. But when I disconnect it I see the battery go down in a matter of seconds when theres something on the screen. I know im charging it right and I use the pause button for on and off, it also just started today. Should I try and see if I could buy a new battery or would FW do the trick because the battery isnt old. Please help.