Boomer, you just add a capacitor in parallel with your main connecting wire. All you do is connect the resistor, before you connect the main cables together.
The resistor slows the rush of current, letting the caps charge slower.
After a sec or 2 you can connect the main cables together and then disconect the resistor.
say the resistance of the main connecting wires are 0.1ohm, and you are using 20 volt batteries,
I=V/R so therefore the current rush will be 20/0.1=200 amps.
Say you connect a 10ohm resistor 1st, the rush would only be 20/10=2 amps.
Im using 1/2 watt 47 ohm resistors then connect the main cables a few seconds after. only draws 0.42 amps then and the sparks are gone.
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