battery_tray.sh

#!/bin/bash
function get_property() {
	cat /sys/devices/platform/smapi/BAT0/$1
}

PREFIX="/usr/share/icons/gnome/24x24/status/"

while true ; do

    PERCENT=$(get_property remaining_percent)
    TIME=
    STATE=
    POWER=

    if [ $(get_property state) == "discharging" ] ; then
        STATE=" (entladend)"
    elif [ $(get_property state) == "charging" ] ; then
        STATE=" (ladend)"
	fi

    if [ ${STATE} ] ; then
        if [ $(get_property state) == "charging" ] ; then
            TIME=$(get_property remaining_charging_time)
        else
            TIME=$(get_property remaining_running_time)
        fi
        HOUR=$(expr ${TIME} / 60)
        MIN=$(expr ${TIME} % 60)
        TIME=$(printf ", %02d:%02d" $HOUR $MIN)
    fi

    ON_AC=$(cat /sys/class/power_supply/AC/online)
    if [ ${ON_AC} = "1" ] || [ ${STATE} ] ; then 
        AC="Netzbetrieb"
    else
        AC="Akkubetrieb"
    fi

    if [ $(get_property power_now) -gt 0 ] ; then
        POWER=", "$(get_property power_now)" mW"
    fi

    if [ ${ON_AC} = "1" ] ; then
        ICON="battery-charging.png"
    elif [ $PERCENT -ge 75 ] ; then
        ICON="battery-full.png"
    elif [ $PERCENT -ge 50 ] ; then
        ICON="battery-good.png"
    elif [ $PERCENT -ge 25 ] ; then
        ICON="battery-low.png"
    else
        ICON="battery-caution.png"
    fi
    echo "tooltip: ${PERCENT}% ${AC}${TIME}${STATE}${POWER}"
    echo "icon:${PREFIX}${ICON}"
    sleep 5
done #| zenity --notification --listen