For those of you needing a very reliable, easy to get, reasonably priced, lightweight and idiot proof power supply, here's the answer.
This billet aluminum bracket is designed to hold 18 volt Milwaukee Lithium-Ion power tool battery (M18 series) and is mounted on rubber bushings. This results in the battery being securely held even during the most extreme conditions.
PLEASE NOTE** Battery and Charger not included, those items are best purchased from a store that stocks Milwaukee Power Tools (Sydney tools, Repco).