https://wccftech.com/ios-14-5-beta-6-introduces-iphone-battery-recalibration-tool/

Shortly after releasing iOS 14.5 Beta 6 to developers, along with other updates, there was a small but noteworthy feature added to the latest beta. iPhone owners will now be able to recalibrate the device’s internal battery when it is not performing as well as you would expect.

First spotted by 9to5Mac, the iPhone battery recalibration tool details have been provided below. If you wish, you can read the entire support page to obtain more knowledge.