Dual cell mod and discharge problem (cell reversal).
How long have you dual cell modifiers had you car moded this way and how long have your batteries lasted. There is a real problem with doing the dual cell mod and it is called cell reversal. The car never shuts off and will drain the battery to 0 volts. When you build a battery pack and discharge it to 0 volts it is a very good chance that you will reverse the polarity on one of the cells because it will discharge lower than it should. I would think that the only way to successfully perform this mod would be to put a switch so you can shut the power off to the PCB.
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