My iPod Touch (4th gen) 32gb has awful battery life...but it may be due to my own user error. I will charge the iPod, but I won't turn it completely off...nor will I turn it off via the top button. I'll just let the screen black out. Anyhoo, by day's end it is drained completely. Do I need to turn it completely off? Or at least turn it off by just touching the top button briefly (not holding it down)? Or could it be the wifi that is causing bad battery life?