commit 4d61a485a38f954948edde6b70b4e6888bb38747
Author: Emil Miler <emil.miler@pedf.cuni.cz>
Date:   Tue Dec 8 10:01:20 2020 +0100

    Initial commit

diff --git a/batterycheck b/batterycheck
new file mode 100755
index 0000000..ae34ee5
--- /dev/null
+++ b/batterycheck
@@ -0,0 +1,12 @@
+#!/bin/sh -e
+
+limit=${1:-18}
+acpi=$(acpi -b)
+acpi_status=$(echo "$acpi" | awk -F ': |,' {'print $2'})
+
+[ "$acpi_status" == "Discharging" ] &&
+	acpi_value=$(echo "$acpi" | awk -F ", " {'print $2'} | sed 's/%//') &&
+	[ "$acpi_value" -lt "$limit" ] &&
+		export DISPLAY=:0.0 &&
+		notify-send -u critical "Battery charge at $acpi_value%"
+