Rapid Battery Health Decline on iPhone 15 Pro Max
I have an iPhone 15 pro Max and my battery health go down from 100% to 91% in less than two months and the last three days I lost 3% is it normal?
[Re-Titled by Moderator]
iPhone 15 Pro Max
What iOS version is your iPhone on? You may want to update to iOS 18.2 that was released just 3 days ago.
Batteries, like people are individuals. No two people age exactly the same and batteries don’t age the same either. The exact usage, chemical makeup, storage conditions, exposure to heat and cold and about a dozen other factors mean that every battery ages differently. Battery aging is not a linear (straight line) and degrades at different rates as the chemicals in the battery age and other factors mentioned above. Apple expects your battery health to be at 80% after 24 months. If your battery health misses that expectation, contact Apple Support.
Please review the Apple Support articles on battery optimization. It contains the current best practices for battery charging.
iPhone Battery and Performance - Apple Support
Batteries - Maximizing Performance - Apple
About the battery and performance of iPhone 11 and later - Apple Support