Review on 36V 30A Lithium Battery Protection Board, BMS Charger Module with Cable for Electric Car, Skateboard, Inverter, and More by Justin Webb

I would not trust this dangerous BMS. I plugged it in, everything worked fine on my electric skateboard. Then I turned everything off. Everything was fine, and the next day the skateboard doesn't turn on and the BMS only shows 20V instead of 40V. I removed and tested the BMS. I found that a component on the bottom of the board is blown, I assume it's a small MOSFET? This component should have burned out when I wasn't using the battery. That said, while I was sleeping and the battery wasn't being used, something in this BMS could still be fried. Very dangerous, spend your extra money on the best.