Batteries and Performance

iOS 11.3 adds new features to show battery health and recommend if a battery needs to be serviced. These can be found in Settings -> Battery and are available for iPhone 6 and later.

Additionally, users can now see if the power management feature that dynamically manages maximum performance to prevent unexpected shutdowns, first introduced in iOS 10.2.1, is on and can choose to turn it off. This feature can be found in Settings -> Battery and is available for iPhone 6, iPhone 6 Plus, iPhone SE, iPhone 6s, iPhone 6s Plus, iPhone 7 and iPhone 7 Plus.

These features will be coming in a later iOS 11.3 beta release.