How to prevent Sparking when connecting batteries with an MGM controllers

[BrianG]

@Finnster: Don't know why you had heat on the resistor while running. Once you connect the main wires, they effectively short out the resistor so there is no voltage drop across it (which means no current flow and therefore no power dissipated). I would suspect the heat came from some other heat producing thing in close proximity, or maybe the main wires heated up and the small wire/resistor heated as well.

@austinmaxx: Should be easy to do, but there would have to be kits for the different connector types and different resistor values for different voltages and capacitance for that specific ESC. Once you calculate what resistance and power value you need, you should be able to get a resistor close to what you need at RadioShack, PartsExpress.com, etc. And this type of thing could be used in ANY ESC, especially when using 5s+ voltages or ESCs that handle really high currents (because those usually have higher capacity caps).