no cell coverage draining my battery
I use my old iPhone X just to get news alerts. There is no cell service to this phone. It's strictly on wifi.
It's been fine sitting on my desk for a year. Just recently the battery starting quickly draining and no cell coverage has been using 94% of my battery. I have turned off all cell service and location service and nothing has helped. If I put it in airplane mode, I don't get the news alerts. My battery health is at 84%.
I don't understand why its draining the battery so quickly. The phone is updated to iOS 15.6
iPhone X