mobile

This phone has generally been rock solid and I love it. Today the weirdest thing happened. Phone was working great and battery was at 30%. I launched camera to take a picture. I took a picture. Right after the low battery noise came and the popup saying the phone was shutting down due to battery came up. Phone shut down. I powered it back up and it worked fine. Battery continued to go down over time to 14% before I charged it.

Any idea why this happened? Never happened before but its super annoying because I was trying to take some pictures but since it powered off by the time it booted back up and was ready the picture opportunity was gone. I'm wondering if its a problem with the camera app or not. Anybody seen anything similar?