Hi guys, I'm in Australia & am organising money for a Chargemaster combo & got to thinking (bad idea) what was the differance between a 110v. model & a 220v. model which we have to use over here, obviously the power supply units recieve different voltages due to country power supplies but both put out 9 vdc, are the Chargemaster units also different for some reason???? Here a Chargemaster 1500 will set you back around $600.00 making importing one a lot cheaper. Thanks! Geoff