Great pics
@IanDVaypes , thanks!
I can't imagine I'm going to use 2x18650 much even though I paid extra for the stupid tube
However I can imagine using 2x350 or 2x490 - double voltage, and more than double battery life compared to 1x of those batteries (because of the reduced voltage drop, as I learnt yesterday from the manual!)
What I'll be interested to see is the battery life of 2x1200mah 490s compared to 1x 2500mah Samsung 650. I assume the Samsung might still edge it, but maybe not by much. Of course that's not a very close size comparison. What would be nice is if 2x800mah 350 was comparable, but I don't see that happening.
I'm really liking both the Total mAH display, and the info on battery drop. That has already taught me that my EFest 3100mah batteries are crap. I knew people say they are, but I had thought that was more in total lifetime.
But now I can see that I was getting up to 0.8V voltage drop towards the end of the battery, and even with the minimum battery setting set to 2.5V I got only 2100mah out of the 3100mah batteries. Very illuminating! I've now got a Samsung 25R in there and it's showing voltage drop of 0.2 - 0.4V (albeit at higher voltages so far) so I'm hopeful I'll get at least the same capacity as the EFest, and maybe even a bit more.
I was at first a bit disappointed to find that the "min battery" setting was after voltage drop - at first I thought a setting of 2.7V meant that when the battery was taken out of the mod, it would read 2.7V. But of course that's not the case - that EFest when I removed it still had a huge 3.3V left, because of the huge voltage drop. Though given my basic Kangxin Mini VF also drained the same battery down to 3.3V, I'm still not sure if being able to set the min battery is going to make much difference in reality versus other mods - I was hoping it was going to let me drain the batteries much further - I never understood why batteries rated as drainable to 2.5-2.7V would never be lower than 3.1-3.2V when taken out of a mod, but I see now voltage drop plays a big part.
I might get a Sony VTC4 as everyone raves about them; up until now I assumed the 2100mah wasn't worth it versus the 2500mah Samsung, but theoretically if they drop voltage less they could give more usable capacity.
So all this has given me more things to geek obsess over, and that's always nice