Galaxy TAB S4: Maximum Power Saving Mode
Navigate to Apps screen > Tap Settings > Tap Device maintenance > Tap Battery > Tap MAX > Tap APPLY > Tap More Options. > Tap Turn off Maximum power saving mode.
Pictorial representation of the above settings are as follows:
Note: When your battery is running low, or when it will be a long time until you can charge your tablet, get the most life out of your battery with Maximum power saving mode.