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Stacked tube mod questions

Im an experienced vape enthusiast and im trying my hand at a mechanical mod. Ive got a dual 18650 mechanical tube mod and i know the batteries together in parallel can handle up to a 0.22 ohm build.
But I'd like to know the volt drop and i dont have a multimeter. How would i check it?
 
Your post is a little unclear, you mention a stacked tube (which has one battery on top of another), but then say you know the batteries in parallel can handle up to a 0.22 ohm build.

Well, a stacked tube has the batteries in series, not in parallel. With two batteries in series you double the voltage, so you need to take that into account when calculating the safety of your build. A 0.22 ohm build is way too low, it would be pulling 38 amps from your batteries when fully charged and that is dangerous territory.

If you are using good batteries like Sony VTC5a's, with a Constant Discharge Rate of 25 amps, you don't want to go below 0.34 ohms and should preferably be at 0.4 ohms or above.

Stay safe! :)

Mech-Mod-Safety.jpg
 

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