#!/bin/sh

for battery in /proc/acpi/battery/BAT*
do
	BATT=`basename $battery`
	STATE=$battery/state
	INFO=$battery/info

	if [ ! -e $STATE -a ! -e $INFO ]
	then
		continue;
	fi

	(
		for y in $STATE $INFO
		do
			if [ -e $y ]
			then
				cat $y
			fi
		done 
	) | awk '
	/present rate:/			{ rate = $3; }
	/remaining capacity:/		{ cap = $3; }
	/design capacity:/		{ dcap = $3; }
	/design capacity warning:/	{ warning = $4; }
	/charging state:/		{ charging = $3; }
	/capacity state:/		{ state = $3; }
	END {
		action = "remaining"
		if ( charging == "charging" ) {
			action = "to charge";
			timeleft = ( dcap - cap ) / rate;
		} else {
			timeleft = ( cap - warning ) / rate;
		}
		percent = cap * 100 / dcap;
		mins = ((timeleft * 100) % 100) * 60 / 100;
		hours = ((timeleft * 100) - ((timeleft * 100) % 100)) / 100;

		printf("Battery '$BATT' %s, %d%% full, %s, %d:%02d %s.\n",
			state, percent, charging, hours, mins, action); 	
	}'

done