I have noticed that my iPhone has been losing time on its battery life for a while and I haven't done anything about it. I updated to iOS 10 yesterday and have loved it. I know that it is still buggy and may crash. Today it did crash, while it was at 100% charge, so I had to turn it off. When I tried to turn it back on, it displayed the screen that I needed to plug it in for low battery. I do not have access to a charger so I left it in my pocket. About an hour later, I took out my phone and tried to turn it on, and it did. Except it was at 25%. I started researching why it did this, but 5 minutes later it turned back off again and wouldn't turn back on. I kept trying, and then I started bending it around to see if the problem was that the battery was loose. Then it turned back on again, and then it died in 5 minutes. This happened about 5 times. Why is this happening?