Enable Android Phome's “System UI Tuner” for Battery % Display and More Features

Need to adjust the battery icon on your Android phone to show the actual percetage display on it? Stock Android phones don't always have the System UI Tuner option displayed by default on the Settings option.

To display the battery percentage just follow these steps to turn on the System UI Tuner function:

1. Pull down the notification menu then press and hold the setting's gear icon for a few seconds.
2. Then a menu notification asking you that  tells you your indicator that the System UI Tuner has been enabled.

Or check out How To Geek's instructions here.