I think it depends by the manufacturer and how they programmed the charger, I got two HP ProBook that almost exclusively got used when plugged in and after a decade they can still last over two hours, instead my Thinkpad t42 with the same usage pattern now just barely holds enough for shutting down the system
I knew someone who threw away a laptop because the screen broke.
They see junk
I see a new home server with built in ups, just rip off the screen.
The “built-in UPS” is gonna degrade real quick, based on my experience
I think it depends by the manufacturer and how they programmed the charger, I got two HP ProBook that almost exclusively got used when plugged in and after a decade they can still last over two hours, instead my Thinkpad t42 with the same usage pattern now just barely holds enough for shutting down the system
Literally my first server lol