The moment of truth - firing the mod with positive to positive, negative to negative post. We get an output reading of 3.35 V under load with some nice glowing coils. This is significantly less voltage drop than the 2.77 V we got with the Voltage Checker. How to account for the difference here?

Positive clip stays attached to positive contact in-mod; negative clip is attached to the negative post of the build deck. You want to be really careful here. Getting the + and - posts mixed up can lead to a battery short.

Here I've attached the positive clip to the positive contact in the mod, and the negative clip to its respective contact. Sorry for my fat fingers blocking the view! As you can see, we get the same voltage output reading without a load: 3.87 V.

You can also use the alligator clips and attach them to the positive and negative terminals of a battery to arrive at the current output voltage. Battery used: LGHB6 18650.

This time with the hood taken off for you coilporn afficiendos lol. A reading of 2.77 V under load. Averaging out the three readings we get an output voltage under load of 2.76 V. That's a voltage drop of 1.21 V! Not as extreme as I mentioned in my original post, but still worryingly high, no?

Second pulse fire of the mod gives us a reading of 2.7 V under load.

Pressing the mod's fire button gives us a reading of 2.83 V under load. Accounting for the slow responsiveness of the device I've taken two more pictures to arrive at an average value...

here we see the resistance of the dual coil setup in the Athena RDA.

Just to demonstrate that the voltage output reading doesn't register until you actually fire the mod, duh!

The Athena Squonk mech mod has been screwed onto the 510 positive connection of the Voltage Checker. It gives us a reading of 3.97 V without additional load. Battery used: LGHB6 18650.