The info that sawdust posted is interesting.... I checked the ones I have and they all use the "yellow" wire to the plug but like I posted earlier, I use the 3000mAh 1.2 volt single cell nicad and it seems to work very well. I had it set to turn off just above 1/8 throttle. Sawdust said the smaller volt battery didn't work for him. I'm a little confused.....

Good luck with yours....

Rick