Well too late........I did and it works just fine. When all else fails read the settings/instructions on the camera flash. We got a real bunch of Boozoos here. I actually read on the camera flash Sunpak GT9 Solid state unit that it can be powered by 110V or 220V set the switch, plug er in and away ya go. Another dead giveaway is read what it says on the cord ..........125 Volts 3 amps. All these self proclaimed intelligistas don't have a clue about this unit. You can use ac or battery....