I wrote a big reply it was lost in Internet space. I hope I remember it all here it is:
First you have to make the 14650 battery extension. I think everyone would agree.
Second that was very impressive with the spring loaded application. It is a turning point in the mechanical world and engineering.
Third did you try the device with less than 0.4 ohms? What would happen? Would it not fire or it gives strange results?
Fourth does the device have any buck circuitry. As in firing at 2.5 volts for example? What happens if the calculated voltage is less than that of the battery.
Fifth what happens if I stack batteries? Will it fry the board or not function or maybe function better
Sixth do you have a spec sheet with input output voltage input output current etc...
Seventh Impressive work on the button it seems I can switch very fast between wattages.
Eighth regarding the mechanical button, you didn't mention it's conductivity. I would assume it has a certain drop in voltage because if the soft spring unless metal on metal contact is easy? What is the tolerance of the opening where the metal parts move?
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