Well I just got the SX 350, so it is a bit early to tell exactly how the 2 mods behave when the battery goes down below 3.7 (I usually charge my batteries throughout the day so they rarely drop below that to be honest). Obviously the Vaporflask has amazing battery life as it is a dual 18650 mod, but my Hana DNA 40 (single 18650) is solid down to the last drop of battery life.I don't mean to hijack this thread, but do you find a difference in battery performance between the dna 40 and the SX350? More specifically, many mods have significantly worse performance when the battery reaches 3.7 volts (including the YiHi chip in y sigelei 20W), so by battery performance I mean do you notice a difference between the two when the batteries are below 3.7 volts. If you could tell me what kind of wattage you typically vape at, that would be helpful as well.
Let me get back with you in a few days after I have a chance to really compare the 2 chips. I usually vape between 20-40 watts BTW (depending on if I'm running a dripper or a tank)...