#!/bin/sh
#based on http://bbs.archlinux.org/viewtopic.php?id=1809

rate=`grep 'present rate' /proc/acpi/battery/BAT0/state | tr -d -c 0-9`
current=`grep 'remaining capacity' /proc/acpi/battery/BAT0/state | tr -d -c 0-9`
total=`grep 'last full capacity' /proc/acpi/battery/BAT0/info | tr -d -c 0-9`
percent=`echo "100 * $current / $total" | bc`

speed=`grep -m1 -o 'cpu MHz.*\.' /proc/cpuinfo | tr -d -c '\n0-9'`

if grep -q discharging /proc/acpi/battery/BAT0/state
then
	minutes=`echo "60 * $current / $rate" | bc`
	echo $speed $minutes $percent'%'
else
	echo $speed $percent'%'
fi