Battery Saver mode helps the device efficiently manage battery usage to extend usage time.
To activate Battery Saver on Samsung Galaxy S8 Plus, follow these steps:
Step 1: Go to 'Settings' and select 'Device Maintenance'.

Step 2: Select 'Battery'.

Select 'Battery'.
Step 3: Turn on Battery Saver.

Activate power saving mode.
Step 4: Activate ultra power saving mode.

Activate ultra power saving mode.
Following the steps above, we have successfully activated power saving mode on the Samsung Galaxy S8 Plus. Wishing you all the best.