Hi Steve, I'm afraid that's a bit beyond me right now. This part of the hobby is the newest and most unfamiliar to me so you'll have to explain how that is best accomplished. I'm sure others might benefit, too.
Currently, I don't use any smaller batteries and my 3S batteries are in storage until I rebuild my farmer friend's Blade 450, which I told him yesterday I'll schedule to do within about the next two weeks. He doesn't have enough time for the hobby really and I can at least make a bit of space in my workshop.