add script check_battery

bin/check_battery

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+../check_battery/check_battery.sh

check_battery/README.md

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+# check_battery
+
+## About
+Check the battery percentage and notify user if it is about to end.
+
+## Requirements
+ - notify-send
+ - mpv
+ - UPower

check_battery/check_battery.sh

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+#!/bin/sh
+
+DEVICE="/org/freedesktop/UPower/devices/battery_BAT0"
+
+time="$(upower -i $DEVICE | grep time | cut -d':' -f2 | tr -s ' ' | cut -c2-)"
+perc="$(upower -i $DEVICE | grep percentage | awk '{print $2}' | tr -d '%')"
+stat="$(upower -i $DEVICE | grep state | awk '{print $2}')"
+
+if [ "$perc" -le "20" ]; then
+    urgency="normal"
+    if [ "$perc" -le "10" ]; then
+        urgency="critical"
+    fi
+    notify-send -u "$urgency" --icon="battery" "Battery is low ($perc%)" "Time remaining is $time."
+    mpv /usr/share/sounds/freedesktop/stereo/dialog-information.oga
+fi
+