Iphone XR charging
My iphone was at 8-10% last night when i put it on charge. It said it would be at 100 by 8 am. I mistakenly took it off before 8 am and it was at 98%. After taking it off for a couple minutes, i put it back on charge so it could get to 100. Then i saw that the battery kept going down instead of up. I left my phone and came back and it was at 93%. I hard reset it and it went down to 89%. I hard reset it again and it went back up to 92%. Any suggestions or idea as to what is going on? my battery performance is at 92.