Thanks guys!
TY Blue!! Good to "see" you!!
Yes to the first question.
I have mods using an 18650 batt with the TI boost module and also mods with 2, 14500 batts in series with the Murata converter. The two are comparable regarding batt life. I can go all day with either mod and pretty much get the same batt life.
I don't think you could get near the same vaping time with using 1, 14500 batt along with the boost module as you get using 2, 14500 batts with the Murata converter.
If you asked me to explain *why* 2, 14500 batts (with 600 mAh each) in series in conjunction with the Murata converter gives the same vaping time as the 18650 batt (with 2400 mAh) with the boost module I'd be at a loss since the mAh isn't doubled when batts are in series, only the volts. The only thing I can think of is that the boost module uses more power in its attempt to regulate the voltage higher and therefore puts a higher drain on the batt. But I may be way off base there. Maybe someone can pop in and explain that.
Now with 2, 18650 batts plus the Murata converter I can get 3-4 days vaping time before the batts need a charge whereas with 1, 18650 batt plus the boost module I get 1 day of vaping time. Like I said, I don't know how to explain that since the mAh stays the same in each setup.
I have noticed with this Murata module it's efficiency over a linear regulator is a huge plus. I can vape all day with the 14500 batts using the Murata module whereas with the linear regulator I was only able to get 5-7 hours vaping time.