What do you all use? I’m in the process of building a new one and was wondering what everyone else uses. Since I have an abundance of dewalt batteries I’ve been using them to power my old box. I figured I could eliminate having to carry a speaker by mounting them in the box. Anything others have found helpful or wish they had done? I usually use mine to charge my phone or run lights. Thinking about dual dewalt batteries but like I said I don’t know.