You’ll have to downscale the resolution unless you have super human vision. I suspect that the laptop is configured to ~150% ootb which would mean those battery estimates are based on that as well.

Send me a laptop and I’ll spend a few hours a week helping on your forums or even tickets. But no one should work for free

Look at frame.work they have good documentation about various Linux distros on their machines

Control, precedent, bean counter analysis etc. Pick your poison.

Try booting to a live ISO. See if it still happens there,

Also you can install a second DE and see if it still happens.

Basically if I add it to my fstab it goes to /mnt. I let the system handle /media for usb etc