HI Edgar Did you find a solution to this problem? I've experienced this problem with:
Debian Jessie -- KDE4 -- Lenovo X230 Debian Strech -- KDE4 & KDE5 -- Sony FM111 I also find that on Debian Stretch KDE4 & KDE5 the applet reports incorrect battery state, says "charging" while /sys/bus/acpi/drivers/battery/PNP0C0A:00/power_supply/BAT1 reports that the battery is discharging.

