I have 3 Prometey v1s all running 28g and ekowhool hollow 2mm running AW IMRs. One is attached to a Super T 18650 and is at 1.77 ohms. Another is attached to a Titanide 18650 and is at 1.84 ohms. The third one is a Super T 18500 and is at 1.17 ohms and its by far the best vape. It's the smoothest, most velvety vape and coolest vape of them all. Can anyone think of why the lowest ohm unit gives the coolest and smoothest vape? I know about ohms law only what I want to know about ohms law and that is "the lower the hotter" which is an assumption based on what I've read on this forum.
The first thing I would do is to move the attys around on the mods and see if the vape follows the atty or stays with the mod. If it follows the atty you have a different setup on that atty than the rest. It does not sound like this is the issue, but one atty could be manufactured differently even though they are all the same model.
If it stays with the mod, it could be a difference in the mods or the batteries, or a combination of the two. If you can move the batteries between the mods do that and see if you see a pattern emerge. If you can't swap batts, I would check voltage drop under load in each and see what I got. I don't have a Prometey but I just looked at a picture of one. Take the tank off a Prometey (I suggest the lower ohm atty) and you can see the positive and negative posts the coil is attached to. You have silica in there so you can fire it wet or dry without hurting the wick and it doesn't matter which for this exercise. Measure battery voltage outside the mod then put the batts back in all the mods. Put that atty on each mod in turn and fire with your DMM probes on the posts measuring volts. The voltage across the posts is what you use coupled with resistance to
figure the watts developed (the amount of heat developed by that coil).
If you charge all the batts and test with them at 4.2V, you can simply calculate watts and compare. If battery volts are different, subtract voltage under load from battery voltage and you get V-drop under load. With your batteries all over say 3.8V you can recalculate all under load voltages so they start with the same battery voltage by taking say 4 volts and subtracting the V-drop under load numbers from that and plug those into the calculator.
If you find your Super T 18500 is making a lot less watts than it should it's either the battery is weak or you have high resistance somewhere in that mod (it needs to be cleaned). A 18500 will have more V-drop under the same load compared to a 18650, but IMO if the batts are all in good shape, it should not be all that noticeable at the ohms you're vaping these at.
