As promised, Apple has included a new screen in the iOS 11.3 beta 2 settings called Battery Health (Beta) available on all iPhones since iPhone 6. This view includes information about the maximum capacity of the battery in the device, and describes whether the battery has degraded to the point where it can no longer offer peak performance.
All devices upgrading to iOS 11.3 start with performance management disabled. It will be enabled by the system when the device first experiences an unexpected shutdown. However, users can go into Settings -> Battery -> Battery Health and disable it. See how (as well as all the different states) after the break …
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