Voltage drop is not the problem -- it is battery capacity. The voltage drop is irrelevant when it comes to battery capacity. That is measured in Ampere-Hours. A battery only has so many of those, and when they're gone the battery voltage will drop like a brick in the rain.Thank you... yes, it helps answer. The motor is connected to a controller board, and apparently, the controller board is somewhat sensitive to voltage drop and it's run off a 12V battery, so as the motor is running, the 12.62 volts continues to drop over hours, so it's important. The improvement over today (with only 1 run of wire) would be reducing the voltage drop to 37.7 millivolts vs today at 75.36 (basically, a 50% improvement). I would assume it would run cooler as well, and less resistance, if the amperage were to run at 18A on occassion.