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fawkesley/poweroffat80percent.sh

Last active May 23, 2022 01:27
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poweroffat80percent.sh - wait for laptop battery to drain to 80% then power off. save battery lifetime.
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poweroffat80percent.sh
#!/bin/sh -eu
while true
do
sudo whoami > /dev/null
BATT_PERCENT=$(cat /sys/class/power_supply/BAT0/capacity)
if [ "$BATT_PERCENT" -le "80" ]; then
echo "battery ${BATT_PERCENT}%. powering off now."
break
else
echo "battery ${BATT_PERCENT}%. waiting till < 80%"
fi
sleep 30s
done
/usr/bin/poweroff
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