![When should I replace my iPhone's battery? How to use Apple's battery health features - AppleToolBox When should I replace my iPhone's battery? How to use Apple's battery health features - AppleToolBox](https://appletoolbox.com/wp-content/uploads/2017/12/iPhone-battery-health-maximum-capacity.jpg)
When should I replace my iPhone's battery? How to use Apple's battery health features - AppleToolBox
Benjamin Mayo on Twitter: "My phone has finished its battery calibration (part of iOS 14.5 for 11 series phones). I went from 86% reported maximum capacity to 90%. So there's that. https://t.co/g5mttxbkiZ" /
![IPhone 6s, max capacity 81% and battery still dies in 1 hour, bad battery? Grandma owned phone since it was bought new. : r/mobilerepair IPhone 6s, max capacity 81% and battery still dies in 1 hour, bad battery? Grandma owned phone since it was bought new. : r/mobilerepair](https://i.redd.it/hlx9vltvdpv51.jpg)