Battery health
I am using iPhone xs. but recently in just 7 days, battery health decreased from 95% to 89%. why this is happening ?
iPhone XS, iOS 15
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have you read
About the battery and performance of iPhone 11 and later - Apple
and maybe
iPhone Battery and Performance - Apple Support
and Batteries - Maximizing Performance - Apple
people report apple does not change the batteries until they are lower than 80% in health