Lightweight battery monitor.Using lightweight desktop environment such as awesome, i3 or xmonad may be really comfortable for certain aspect, but there are also few thing that you may miss from a regular desktop environment.This is the case of some kind of warning pop-up which indicates you that your battery is going dead. How many times do you …

battery-mon.sh

#!/bin/bash
#
# Print battery warning
#

VERBOSE=0
SUSPEND_CMD=/home/stk/.i3/suspend.sh
TIMEOUT=120
DEVNAME='/org/freedesktop/UPower/devices/battery_BAT0'
ALERT_THR=15
CRITICAL_THR=10
SUSPEND_THR=5

function checkBattery (){
  batteryLevel=`upower -i $DEVNAME |grep 'percentage' |grep -o '[0-9]*[\.0-9]*' | cut -d '.' -f1`
  state=`upower -i $DEVNAME | grep "state" | cut -d ':' -f2 | grep -o "[a-z]*"`
  if [ $VERBOSE -eq 1 ]
	then	
    	echo "Battery level: $batteryLevel" 
    	echo "Battery state: $state"
	fi
  if [ "$state" == "discharging" ]
	then
    if [ "$SUSPEND_THR" -gt "$batteryLevel" ]
    then
		  	notify-send -u normal  "Battery Almost Dead" "Level=$batteryLevel%!\nSuspending in $TIMEOUT sec."
        sleep $TIMEOUT
        exec $SUSPEND_CMD
    elif [ "$CRITICAL_THR" -gt "$batteryLevel" ]
    then
		  	notify-send -u critical  "Very Low Battery" "Level=$batteryLevel%!\nHurry up or I will suspend your session!"
    elif [ "$ALERT_THR" -gt "$batteryLevel" ]
    then
		  	notify-send -u normal  "Low Battery" "Lever=$batteryLevel%"
    fi                     
  fi                      
}

if [ "$1" == "--daemon" ];
then 
  while true 
  do
	  checkBattery
	  sleep $TIMEOUT
  done
else 
  checkBattery
fi