i was out with my iPhone 6s with low battery and the battery died. When I got home, I plugged it in and it lit up and turned back on so I left it sit. Came back about 10 minutes later to check for messages but it was off which was strange. I turned it on and went to use it, but it froze, flashed low battery and turned off again (it was still plugged in and at 10% battery). So I turned it back on. It showed 6% now. After 10 seconds, it froze again, showed low battery and turned off yet again. I tried numerous hard resets but the issue kept repeating. It finally turned back on and began charging as normal. I'm concerned that my battery might be faulty. Has anyone else had a similar issue before?