However, if you don’t calibrate your battery regularly, you may eventually find your laptop suddenly dying on you when you’re using it — without any prior warnings.

The battery in an old laptop often won't show an accurate reading of the life remaining. Calibration is a relatively easy process and will get things back to how they were.

Increase Battery life of Windows 11/10 laptop. Learn how to manually calibrate your laptop battery to improve its life and performance.

Calibrating the battery helps keep the computer in sync with the battery's microprocessors, which are responsible for reporting the battery's charge.