i would not recommend the Smok XPro M50 (65Watt upgrade), after 2 weeks of owning one, Im not sure if the circuitry fried or what went down but after multiple fresh batteries the thing would continuously do power reductions, with anything, Atlantis, RDA, RBA, I mean everything. So I took it back to my local vape shop (now out of business) and the other one they had sitting on the shelf was doing the same thing, so clearly not anything I did. IMO, don't buy this hunk of junk. Now the XPro M65, (which a buddy owns) seems to be functioning as advertised. All being said, might as well buck up and get the IPV3, haven't had a problem. Cheers.