Hi Paul. I'm Greg, an installation specialist, 10 year Windows MVP, and Volunteer Moderator here to help you.
The option is not available in all model PC's.
For Asus battery limiting see here:
https://www.asus.com/us/support/FAQ/1032726/
Lenovo has removed it. See here:
https://forums.lenovo.com/t5/ThinkPad-11e-Windo...
For Surface see here:
https://www.thewindowsclub.com/enable-disable-b...
If your PC doesn't have the battery limiting feature, there are still some options here:
https://windowsreport.com/software-stop-battery...
I hope this helps. Feel free to ask back any questions and keep me posted. I will keep working with you until it's resolved.
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