Well, for all the people who think 6 volts is safe, it is not. Well, I hit the foward button on my controller for a second, and it stayed on and started smoking! I thought about it, and I coulda' used it for a ZZ. Anyway, what fries.
BTW: I had the first gen DKS 3.4, (mind you, the car ran for about 30 seconds before I turned off the hyper charger

) on it. I thought I had finally fried it (it's been 4 years), popped it into a stock ZZ, and it runs fine, though it's a little faster in reverse than forwards, but hey, all the others on 6 volts have died!