Some laptops intentionally slow down when they are running on battery.
Projekt GNOME dokumentacije
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Michael Hill
mdhillca@gmail.com

# Why is my laptop slow when it is on battery?

Some laptops intentionally slow down when they are running on battery in order to conserve power. The processor (CPU) in the laptop switches to a slower speed, and processors use less power when running slower, so the battery should last longer.

This feature is called CPU frequency scaling.