The Performance Drop at 20%
Windows 11 features a built-in Battery Saver mode designed to keep your laptop alive as long as possible when you are away from a charger. By default, the moment your battery level hits 20%, Windows automatically engages this mode. The screen instantly dims, background syncing stops, and most importantly, your CPU performance is severely throttled. If you are in the middle of exporting a video, compiling code, or playing a game when you hit that 20% mark, the sudden performance drop can cause extreme lag or even software crashes.
How to Disable Automatic Battery Saver
You can prevent Windows from taking control of your power management, ensuring your laptop runs at maximum performance right down to 0%.
1. Click the Start button, type Settings, and press Enter.
2. In the left-hand sidebar, click on System.
3. In the main pane, click on Power & battery.
4. Scroll down to the “Battery” section and click the Battery saver banner to expand its options.
5. Look for the dropdown menu labelled Turn battery saver on automatically at.
6. Click the dropdown menu and select Never.
How to Adjust the Threshold
If you don’t want to disable the feature entirely, but simply feel that 20% is too aggressive, you can use the same dropdown menu to change the threshold. For example, setting it to 10% ensures you get maximum performance for longer, but still gives you a dim-screen warning right before the laptop completely dies. Regardless of the automatic setting, you can always manually engage Battery Saver at any time by clicking the battery icon in your taskbar and clicking the leaf icon in the Quick Settings panel.