Hello. I’m standing in a situation were I have 4 2S batteries. I have these batteries because they are the only ones that fit in my design. I just don’t know how I am going to charge them. I can do it individually, but it would be annoying. That’s why I need a solution on how to charge them in series. If I connected them by 2 4S, I wouldn’t mind charging those 2 individually. I could imagine that I could use a parallel board charger, but I don’t think that would be possible because the all of the main wires are welted in series.
I hope somebody can help me with explaining how I can do it, or with a diagram of some sort.