(Note that the iPhone XR, iPhone 11, iPhone 12 mini, and the iPhone 13 mini will need iOS 16.1 for the option to show the battery percentage.) 2. Activate Low Power Mode ...
The simplest and most effective remedy to fix this is to force restart your iPhone. For iPhone 7 & 7 Plus: Press and hold the volume down and power button until the Apple logo appears. On iPhone 6, 6s ...