I had lost my controller charger and was looking everywhere for a new or used one. Nobody would list the voltage required, they just say output voltage DC. I checked one ad that had the option for enlarging the photos and could read "output 12 volt 1.0 amp" on the label. That's a pretty standard wall wart spec so I got one out of my spares box with the right plug and gave it a shot. Result is, it works fine. Most people who fool with electronics have one that will work.