#!/bin/bash

STATE=`cat /sys/class/power_supply/BAT0/status`

BATCAPACITY=`cat /sys/class/power_supply/BAT0/energy_full`
BATLEVEL=`cat /sys/class/power_supply/BAT0/energy_now`
BATPERCENT=`expr 100 \* $BATLEVEL / $BATCAPACITY`

echo "$STATE $BATPERCENT%"