Оригинальный сообщение: saulgarza73 ,
When it happened to me I was sure it was the battery or the fact that I changed it. But I did the exact same thing to my wife's iphone and hers worked perfect. So I kept digging and I found out that the soldering broke loose on the battery connection. Exactly where the battery plug connects that connection onto the board was bad for me. They charge $30 more or less on e-bay. Some sellers offer services on iphones and I found one that does specifically the battery connection. I got mine fixed good luck.