Depends. It’s more fiddly than windows to get set up but there’s a lot more options for power management.

I’ve got a tiny 7 inch laptop and I genuinely can’t figure out how to stop the fan from constantly running under windows. On Linux, switchable underclocking and powertop make it last much longer.

This is assuming you’ve not got an Nvidia GPU in your laptop, I haven’t tried in years but toggling the GPU was always difficult.