Since this isn't an unregulated mod the programming of the Tinymight should prevent any of us from ever getting into a situation where a cell is being drained beyond its rated output. I don't know the exact specifications the maker has programmed into the device but reports of some cells not even firing reinforce this even more for me. I tried a couple of my new Molicel 26A's recently and they worked like a charm. The 400mA loss of current probably affected draw count but I wasn't at all paying attention so I can't say how much of decrease it resulted in. I drained them to the point where the device wouldn't fire and there was no decrease in performance. They're a higher drain battery then the VTC6's though so I wouldn't have expected anything less.
If the cell is old or pulling more amps then it can handle the voltage will drop like crazy and a regulated mod will not fire.
Can't say if the TM is doing this, but it is how a regulated mod works. Mods will also not fire if it can't reach the required voltage demand, some will just drop the wattage, but some will also not fire completely.
Gotta watch out for those fake batteries too, just cause that's what you bought and what it looks like does not mean that's what it is. I remember their was an epidemic of popular batteries being faked a couple years back.
Edit: Also, I looked into it more. If the circuity is 90% efficient at 70w it would be pulling 26a according to this calculator. (oh shit looked into it further and appears the website is calculating the amp draw with battery at 3v to try and sell you higher amp batteries or something, at 3.7v nominal it would only draw 21w at 90% efficiency)
https://liionwholesale.com/pages/regulated-mod-calculator
Mooch the battery guru who does independent testing on cells rate VTC6 at 15a/20a
https://www.facebook.com/batterymoo...tastic-15a20a-batterybottom/2018639535092289/
"But this is not a high performance “power” cell, designed for high current. It is a high capacity “energy” cell designed for low to moderate power levels and long running time. At higher current levels the voltage sag and power loss in the cell are huge. Do not exceed 20A." - Mooch
Edit: Also I gotta mention, just cause it maybe safer does not mean it is safe. I don't risk it and only run batteries at higher amps than I plan on using.
Also, i'm sure TM did their homework and knows it's okay to use, but it's also nice to do your own homework sometimes.