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#!/bin/sh
state="$HOME/.battery_warned"
if [ -f "$state" ]; then
rm "$state"
fi
while true; do
perc="$(acpi | awk 'BEGIN { IFS="," } /Battery 0: Discharging/ { print(substr($4,0,length($4)-2)) }')"
if [ -n "$perc" ]; then
if [[ "$perc" < "20" ]] && [[ ! -f "$state" ]]; then
notify-send -u critical "Battery low! $perc%"
touch "$state"
fi
fi
sleep 60s
done
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