TL;TR
echo 80 > /sys/class/power_supply/BAT0/charge_control_start_threshold
echo 100 > /sys/class/power_supply/BAT0/charge_control_end_threshold
and note - linux tools slightly lying about battery state. it say charging why actually deosen’t
check
cat /sys/class/power_supply/BAT0/state
it it says unknown, mean not charning.
also note battery led status, on charge it goes green , if it is white , mean no charge.
note you can change those values
start == do not charge until battery is above mark
end == stop change when battery reach mark