After updating to the first iOS7 offering my iPad 3 kept losing too much power overnight (10-12%). After several updates from Apple it stabilized and seemed to be back to normal. Now I have developed a different battery problem and would like opinions on whether it is a bad battery or software issue.
My iPad is less than 2 years old and has not had extensive use or recharging. It will charge to 100% and hold that charge for several days if not used. Then usage and battery drain seem reasonable. The issue is that the last two times the battery got into the 70% range it drained itself overnight. I mean totally dead.
I would think a bad battery would either not charge to 100% or would discharge rapidly after charging. Not hold a charge and then fall off a cliff. I think it really is charging to 100% because the recharge time involved is what I have experienced in the past.
Thoughts and experiences please.