Added setting for battery conservation mode (Lenovo)
[Edit - PSA (jpetso): If your dev session Plasma struggles to open the Power Management KCM (or even log in? not sure), it's because the new KAuth action isn't correctly set up on your system yet. Check the Plasma 6 wiki page for links to MRs that can help with this.]
The setting is not consistently persistent, it resets occasionally after power loss and/or reboot. It might be a good idea to implement a toggle for restoring the setting on reboot. How does this behave on laptops with thresholds?
The device is correctly shown as "Not charging", but it keeps being shown in the tray. Just like it was actually charging. This might be intended / a good thing though. Some hint for this mode or the charge threshold setting would certainly help.
The path is fixed for now, as there is no evidence of a device that differs from it. At least I wasn't able to find one after a quick search.
BUG: 441057 FIXED-IN: 6.1
CC @broulik