Noob Question on Battery Volts vs Mod Usage Volts

[TimeLordSavant]

I just got a Cloupor Mini 30W (1 hour ago in the mail to be exact) - I am using a Sony VTC4 3.7V 18650 2100mAh with an Aspire N tank on 1.38ohms (reading on Cloupor).

Noob Question here - I know the VTC4 charges to around 4.2V but when I turn my Cloupor up to 30W and the volts are pulling out at 7V... is that safe? I may be totally confusing the two things, but I don't want to over-drain the battery pulling 7V if it is a 3.7V and end up damaging the battery or mod.

I seem to be getting the best flavor at around 6V or 26.0W... but I don't want to burn the coil out or kill the battery too soon.

Can someone help me understand the different between the V on the battery vs the V on the Mod, please? Inquisitive minds want to know.

Also, it is advertised as safe for going as low as .45ohms - so if I put a Hobo rda or Dark Horse rda on it, for example, with a dual coil at .45ohms, what Wattage should I leave the Cloupor at? Lowest at 7W or is it perfectly safe to turn up to high 30W? With a 30amp high drain battery, of course.

I went from a iJust (that I dropped way to much) to owning a Stingray and Silver Bullet Mech, I have also a Spinner2 and now have the Cloupor and just want to understand the Cloupor's limitations.

Thanks!

 

[bwh79]

Since you have a regulated mod, the amp drain on the battery is highest when the battery voltage is at its lowest. Even at 3.2v, cranking it all the way up to 30w will only pull 30 / 3.2 = 9.375 amps, well within the 30A limit on your VTC4, even if you allow yourself a full 50% margin for error and call it a 15A limit instead.

 

[TimeLordSavant]

Perfectly safe then - thanks!!

 

[bwh79]

Perfectly safe then - thanks!!

Yes you ought to be perfectly fine (aside from any manufacturing defect in the Cloupor, but that's a topic for another discussion -- if I recall it only affected the very earliest units to be released so if you've purchased this new, recently, then you ought to be in the clear.)

Now if you were talking a mechanical or unregulated mod instead, then it would be a different story. The amp draw would be highest on a fully charged battery, instead of the fully drained one. You'd still be well within safe limits, even at .45, but the math to get there would be different. Key is that in a mechanical, the amp draw is determined by volts over ohms (and the wattage can't be adjusted, it is fixed at volts squared over ohms, or amps times volts) whereas with a regulated mod, "power in equals power out" and the amp draw is simply watts over volts, so it is determined only by the selected wattage setting and the discharge state of the battery, the ohms of your resistor are not even a factor in this latter case.