In mid June when my father upgraded from his iPhone 5 to something else, I received the iPhone. It has been known to deplete charge quicker than usual, but in the last 3 weeks it has become tremendously worse. It would die at 65% and would turn back on after it was plugged in for 5 sec. But in the last 5 days it would sit charging for up to 40 minutes then turn on and say “battery at 58%”. Yesterday morning after dying at 100% it say charging for 2 hours (it eventually turned on), and then last night it sat for 3 hours. This morning I went to turn it off after it hit 100% (I haven’t powered it off for a couple weeks) and when I went to turn it on it died. It has been charging for about six and a half hours now and still shows the drained battery icon. What is the issue and is it correctable?
Thanks!