Thanks for the link how big are they? I want something very small. I like simplicity. I will most likely be running one maybe two dogs a time (currently own only one).
Does anyone else have the car charger from the UD site? I feel that it does not give as much power as the wall wart does is this an issue with the car adapter or the car bc today I did notice a decrease in temp between the two.
I think there are some pretty small models available here: http://www.tattoomachineequipment.com/tattoo-power-supplies I think this is where Zapman Rick is getting ones for his vapes now.
You can also find a variety of power supplies that would get the job done on Amazon by searching for "Tattoo Power Supply" or "Variable DC Power Supply". A 1-15v 2A power supply should be plenty of power for 2-3 Pups so no need for anything bigger or more powerful.
EDIT: Oh, re: the car adapter - how much power the car adapter puts out is going to be dependent on your particular car, for many people it will run hotter than the wall-wart but in some cases (like yours maybe) it could potentially run cooler (ie lower voltage). If you've got a multimeter you can always measure and see what your car is putting out..