I just purchased a Sigeli Z-Max v3, and I think I have most of the functions figured out, but have a couple questions about it that I hope I can find the answers to. I have several other VV/VW mods so I am familular with that part of the operation, my first question is I have read where you can run 2 18350 betteries in it at once, is this true?, and if so what are the advantages & disadvantages of doing this versus running one 18650?. Second question, I assume that the Z-Max v3 will shut itself down when the batt voltage drops to a certain point, but how do you know when you reach that point, or does it just shut down without warning? Last question, what is the difference between the RMS and Mean modes, is one better than the other? Thanks in advance!!!!