Adjusting battery saver to automatically turn on at a higher battery level, lowering the screen brightness, and allowing your computer to sleep sooner after inactivity occurs are all techniques for improving your battery life.
Lowering your computer screen brightness will also help you save battery power.
Click the Start button.
Click the Settings button.
Settings categories appear.
Choose System.
Adjust the Change brightness slider to the desired brightness level.
If you're using a desktop PC or external monitor, you may not have a brightness slider in your Settings menu. Instead, use the buttons on your monitor to adjust brightness.