I have updated to the latest bios now and set limit for battery charge to 80% in bios. But still the battery is charged up to 100%. This problem has appeared some updates ago, probably of KDE Plasma.
After bios update also I reinstalled tlpui but once again setting standby mode and waking up the PC ends into a blackscreen. Only hard shut down helps for restart.
There is definitely something wrong with the power management of KDE Plasma.
I had this on my asus zenbook, the advanced power setting would reset to 100% after reboot.
i went to the arch wiki and followed this. Not sure if it would apply to you or not though.
https://wiki.archlinux.org/title/Laptop/ASUS#systemd_service
ETA: i used 86 not 60.
told you to change it from 80% to something else …
are you dual booting windows? if so, try to limit it in windows, and see if that helped…
I do not use dual booting. I use pure Manjaro Linux KDE Plasma.
… In bios there is not setting of percentage, only battery long life setting or somehting like this.
I will try it out and let you know.
I have tried it out but your solution does not work with HP Probook 450 G5.
It seems I have to wait until KDE Plasma will have an update to fix this problem. 