IPhone 11 battery health indicator inconsistent.
I have an iphone 11. the battery health before the recalibration of the battery health measuring system was 88%. After the recalibration it increased to 91%. Since then the battery health is varying between 89-91%. Some days it shows 89%, some days 90% and some days 91%. However the battery life that i am getting is not even getting me through half a day with average usage . How can this be resolved?
iPhone 11, iOS 14