This is the mod we have all been looking for. As always use at your own risk....if your ZZ blows up....dont blame me.
there are two 68 ohm resistors that will be jumpered. Locate these resistors as follows:
1) Remove the clear cover over the PCB.
2) hold the ZZ so the motor is on the right.
3) on the PCB there is a very small resistor on the very bottom right corner just below a 3 pin MOSFET (labeled Q6). Solder a jumper across this resistor.
4) locate the same resistor just below Q5 and jumper it.
5) In summary you are jumpering the two resistors just below Q5 and Q6. Note: between Q5 and Q6 there are two resistors the one you are jumpering is the top one (the one next to Q5).
Based on test myself and others have done we know that the speed controller has a very high on resistance. I originally thought this was due to poor components etc. I now think that the speed controller is designed to not allow full current to reach the motor. Not sure why, but it seems that way.
This mod allows forward and reverse to work and boosts the current supplied to the motor by 25% from a somewhat charged battery of 1.22volts before the mod I saw 97ma after I was getting 125ma. A fully charged battery no doubt would bump the current more.
I would caution against running multiple batteries with this mod.
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