Step 6: Set turn on automatically battery saver at Never/at 5% battery/at 15% battery. Step 5: To turn on battery saver automatically, tap turn on automatically.
When turn on the toggle button, your android device top and bottom screen view as orange color. Step 4: To turn battery saver on or off, switch on/off toggle button. By default turn off battery saver on Android 8.0 Oreo.