We have built a tank using 2 Power Wheels motors and the TRex dual motor controller. The tank weighs 34 pounds. We are using a 6 channel Futaba 6EXP transmitter and receiver. We are using the BEC jumper on the controller to power the receiver. With a fully charged 12v 1.8ah Pb battery, things work great for about 10 minutes. Then very quickly the tank starts to stall. According to the LED status lights it appears that the controller is resetting. Our guess is that the Power Wheels motors are drawing quite a bit more than we thought. Does this sound like the problem? Should we use a better power source such as a 6v 4ah battery? Would a NiMH or NiCD battery be better than a Pb battery? We need the tank to run for at least 20 minutes. Or is the problem with the Futaba transmitter and receiver?