[caver01]

Using the external power is a neat idea, but don't you still have to install bypass wires to the charge pads to charge DIRECTLY? I have not read the power supply thread yet, so I am not familiar with that mod. I wouldhope that it includes wiring power directly to the charge pad.

As for the previous post regarding "can't I just charge like 6 times" the answer is: Probably not. You will not be pushing the correct voltage. Charging too low of a voltage 6 times will not help. You need to increase charge volts to fully charge a higher voltage battery.

As for the multiple batteries and resistance, I too have read a lot about this. For a while, my re-worked dual setup was only drawing power from one battery. I cannot explain why, but eventually, after careful insulation from other PCB components, I have the dual battery mod working just fine and charging goes to both batteries. It doesn't seem to make a difference on my setup if I had taped wires to the batts, or if I soldered on copper tabs. In order for a charge to work, it obviously must connect to both the positive AND the negative terminals of the ganged batteries. So, one pole is on one end of battery 1 and the other pole is on the other end of battery 2. It seems to me that you cannot avoid sending electricity through both batteries. I found that I had to be extremely careful about insulation to keep the PCB from shorting on the wires or tabs, to keep the connections in the proper order etc. When everything is setup and properly isolated, I have not found that one battery charges more than the other.

Finally, with respect to the right voltages or timing, I'm no electrical engineer. It would help to have input from someone who really knows about this whether 4.5 volts or 6 volts are best for 2-150mah NiMHs and what the timing should be to extend the battery life. Can someone chime in here on that subject? Everyone should know the correct answer for this both on the ZZ forum and others.