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#!/bin/bash
while true
do
battery_level=$(cat /sys/class/power_supply/BAT0/capacity)
if [ $battery_level -ge 95 ]; then
notify-send 'Pull the plug!' $battery_level%
elif [ $battery_level -le 30 -a $battery_level -ge 20 ]; then
notify-send 'Plug me!' $battery_level%
elif [ $battery_level -le 20 ]; then
notify-send -u critical 'Plug me NOW!' $battery_level%
fi
sleep 300 # 300 seconds or 5 minutes
done
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