Battery health
My device battery health is droping so fast . I often charge my phone on fast Charger.My device drop battery 3% so increasingly fast . Please suggest .
iPhone 12 Pro Max, iOS 15
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