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Q: "If it's not there, it's too easy to short-circuit that cell group. Insulating washers were needed on all the positive ends. Do you have a BMS for the battery?" I acknowledge that this is unsafe, it's melted because I dropped it on a metal table and some of the batteries exploded and I...

I think I might have fried one of my motor controllers when I plugged my battery into it. There was a big spark when I touched the positive leads and it never made my motor turn to begin with. I have a new controller and I was looking for advice to make sure I don’t fry a second one (VEVOR). I...