parallel board

I have a battery, then realized, hey, no way to charge this thing. Looked at some chargers on Amazon, and found something called a parallel charging board (Board Link) for $11. It fits my XT30 battery, but should I go with something else? Also, what the heck is a parallel charging board and how...

Hey guys. quick question: I recently picked up a 8s paraboard that of course has an 8s balance lead stemming from it. so how do I connect that to the 6s lead in my charger? I have an additional 6s balance cable, but can I simply plug it in aligning the negatives to the 8s port? like this: