Battery Health issue
my iphone has battery health at 96 percent but it dropped to 91 percent in 10 days. Why this happened to my phone?
iPhone XR, iOS 14
It’s getting older.
Without knowing the age since new there is nothing else to say except if it is 9 months old or more it is normal.
If it drops to 79% inside the warranty period then have the battery looked at under warranty.