osx battery low apple script

gistfile1.txt

set Cap to (do shell script "ioreg -w0 -l | grep ExternalChargeCapable")
tell Cap to set {wallPower} to {last word of paragraph 1}
set CurrentVolume to output volume of (get volume settings)

if wallPower = "Yes" then
	return 0
else
	set Cap to (do shell script "ioreg -wO -l | grep Capacity")
	tell Cap to set {Available, Max} to {last word of paragraph 2, last word of paragraph 1}
	set Pct to round (100 * (Max / Available))
	-- tell application "System Events" to display dialog "Battery is at " & Available & " - " & Max & " - " & Pct & "%"
	if Pct < 3 then
		set volume output volume 80
		do shell script "afplay /System/Library/Sounds/Purr.aiff"
		set volume output volume CurrentVolume
		-- tell application "System Events" to display dialog "Battery below 3%!"
	else if Pct < 5 then
		set volume output volume 40
		do shell script "afplay /System/Library/Sounds/Purr.aiff"
		set volume output volume CurrentVolume
		-- tell application "System Events" to display dialog "Battery below 5%!"
	end if
end if


#
-- tell application "System Events" to display dialog (get output volume of (get volume settings))