First, click the "Settings" icon to turn on the iPhone.
Enter iPhone settings.
Second, then find "General" in the settings list and click Enter.
Enter iPhone general settings.
3. Next, find "Dose" in the general options, and then click Enter.
IPhone battery power display settings
4. Find "Battery Percentage" in the usage list.
Display and setting method of battery power percentage of iPhone
5. Press the switch on the right with your finger to turn it on. At this point, the open state is displayed in blue. At this time, you can see that the percentage display has appeared on the right side of the power chart in the status bar above the iPhone.