Over the last 24 hours, I've noticed a rather strange issue with my phone's battery.Yesterday, I took the phone off of charge before going to school. It was idle for most of the day, accept for a few minutes in the morning when I checked in using swarm.When I got home, I noticed that my battery had gone from 100% to 88%, and that was with it being in standby for most of the day. I made two phone calls, which dropped the phone from 88% to 68% within the space of maybe 45 minutes.I put my phone on charge at around eight pm, US eastern time. Nearly 12 hours later, voiceover is saying that my phone is at 100%, but it is still charging. I have an IPhone SE that is just over a year old. It is running the latest version of IOS. I have things like background app refresh turned off. Any ideas?