Replacement battery shows 100% but phone turns off if not plugged in.
I replaced my iPhone 4S battery but it won't turn on unless it is plugged in to the wall. Once it's plugged in the battery shows 100% but immediately turns off when I unplug it. The original battery, however, doesn't have that problem once I put it back in the phone.
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Brandon M, id this only happens with the new battery, I would definitely exchange it. Sounds like the battery circuit board has some problems.
by oldturkey03