This lists the battery status for MacBooks, and the current % if not attached to an AC adapter.
The shell script is:
my_ac_adapt=`ioreg -w0 -l | grep ExternalConnected | awk '{print $5}'`
if [ "$my_ac_adapt" == "Yes" ]
then
echo "Power : External"
else
cur_power=`ioreg -w0 -l | grep CurrentCapacity | awk '{print $5}'`
max_power=`ioreg -w0 -l | grep MaxCapacity | awk '{print $5}'`
bat_percent=`echo "scale=2;$cur_power / $max_power" | bc`
bat_percent=`echo "$bat_percent * 100" | bc | sed 's/.00//'`
cyc_count=`ioreg -w0 -l | grep "Cycle Count" | awk 'BEGIN { FS = "=" } ; {print $8}' | awk 'BEGIN { FS = "}" } ; {print $1}'`
echo "Power : Battery ($bat_percent%)"
echo "Cycles : $cyc_count"
fi
Just paste that into a file, set it executable, and run it as a shell command under GeekTool. Alternatively, just download the geeklet file linked below.
Screenshot 1:
Screenshot 2:
