Settings : Battery
Open quick settings
and touch
Have it turn on automatically
To turn on when your battery is below a specified level:
1.
Open quick settings, then touch & hold
2.
Touch Battery Saver > Turn on automatically.
3.
Move the slider to adjust the percentage when Battery Saver switches on.
Show battery percentage in status bar
To show the percentage of battery power remaining in the status bar:
1.
Go to
Settings
> Battery.
Or, open quick settings, then touch & hold
2.
Turn Battery percentage on
.
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