I've had my 5 since it was introduced back many years ago. Charging has been normal and so has the runtime of the device. Just the other day when it was charging in my car, using the same cable it started to get quite hot. This is quite unusual for my device. I then charged it at home and noticed the same thing with my OEM cable. Just this morning, my iPhone was dead in as much when I turned it on, the red and black battery icon was there. That could not be possible since I turned it off and it was in AIRPLANE mode the night before. This afternoon, I charged it up again and I restored it via iTunes. It's got quite hot again. I know my iPhone is now old, but I don't want to replace it especially since the iPhone 7 will be only a slight upgrade. I will get next year's iPhone. However, I am wondering if I should go to the Apple Store and get the battery changed, assuming that IS the problem and not a hardware issue. Any thoughts?