Last year before the new iPhone 7 came out, all four of the iPhones in use by my family were suffering from the battery shutdown problem. Kyle was getting a new iPhone 7 from me for his birthday but I asked him to take his iPhone 6 into Apple while it was still under AppleCare to try to get it replaced. Apple told Kyle there was nothing wrong with the battery and refused to replace it. They said to do a DFU (Device Firmware Update) and to not restore from a backup and that would fix it. They were certain that there was something in Kyle’s apps or data causing the problem. We know from recent reports that Apple is now admitting that something was indeed wrong with the OS that was causing the problem and they’ve been able to measure a decrease in the problem from a recent iOS update.