I purchased my iPhone 4S on November 8th, 2013, now the iPhone first started having problems in summer, maybe in July.
The phone first died at 15%, eventually the problem got even worse. The phone then frequently died at 50%. Now don't stop reading yet. The phone then died at 60, then 70, then 80, then 90. When I plug the phone in the outlet the phone will zip all the way back up to 100% in 5 mins, then the phone will go down to 92% and die. Then i charge again, take the phone out and it goes down too 82% and dies. Can someone please give me some healthy, useful, advice so I can get my phone up and running perfectly again?