Hey everyone,

I’ll start off with my plan. I’m going to be making an electric mountain board, and I will have two 6S 5200mAh in series for a total voltage of 44.4v. My goal is to be able to fill a backpack with more batteries, and to have a system to switch between on board batteries and the external ones in my backpack. How would I go about this? Is there a premade circuit board out there? Or do I have to make my own? If so, where would I find some good diagrams?

Any help is appreciated,

Thanks!