[Powerdevil] [Bug 450551] Battery charge limit is not preserved after reboot on many laptops that support charge limits; need to write it on every boot

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=450551

--- Comment #39 from ioo+...@posteo.net ---
So #17 is a systemd service that run this command:
echo 75 > /sys/class/power_supply/CMB0/charge_control_end_threshold

but when I run it as root I get:
bash: echo: write error: Invalid argument

so it doesn't seem to be writable for me, somehow KDE knows how to write to it
because I can set it in the GUI but after a reboot its back to 100%. I would
like to know how KDE writes to this special file.

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