veqq parent
I get 30 hours on a 2017 Dell, using Linux mint. auto-cpufreq or even just making an alias to disable some cores let you push it very far
Nothing screams "Linux desktop" quite like a custom terminal command to manually manage your CPU cores being presented as a solution for longer battery life.
As a two and a half decade user of Linux desktops, this comment is spot on.
That said, at work I'm using a Windows desktop for the first time in over 15 years. There are so many places I'd like to run scripts to improve this thing. i have come to the conclusion that running scripts to fix small annoyances is a feature of those who are drawn to Linux, not a shortcoming of KDE or Gnome. I'd do the same if it were even possible on this (locked down corporate) Windows box.