select serial_number from battery;

<?xml version="1.0" encoding="UTF-8"?>
<extensionAttribute>
	<displayName>Battery Serial Number</displayName>
	<displayInCategory>System Information</displayInCategory>
	<dataType>string</dataType>
	<description>This attribute returns serial number of the battery, if installed.</description>
	<scriptContentsMac>#!/bin/sh

echo "<result>$(ioreg -r -c "AppleSmartBattery" | grep "BatterySerialNumber" | awk '{print $3}' | sed s/\"//g)</result>"
	</scriptContentsMac>
</extensionAttribute>