The battery meter on my iPhone 5 is not correct. Last night my phone died when the meter said it had over 50%. Today the meter got stuck at 100% until I rebooted it and is now stuck at 96%. Before I purchase a new battery, I just want to be sure that this issue is with the battery and not the phone itself. I would think that the meter was a function of the phone by measuring the voltage or maybe just counting down the usage time and estimating it, but I am not sure.