Mech Mode Problem With Ohms Law

An online vape shop here at Greece at the description for dotBox Dual Mech mod says"

"Switch to Parallel Mode for longer Vaping time and exceptional power from two 18650 batteries".

The dotbox dual mech has the option to select series or parallel connection via a switch.
I send them a email that this doesn't apply (for the same power output always),for example 0.1 ohm coil in parallel connection and 0.4 ohm coil in series connection.

Two batteries in series provide the same amount of watt hours a parallel connection does.

The vapeshop replied and told me that the description is copy and paste from Dotmod.com

Indeed.
QUOTE from dotBox Dual Mech - dotmodretail
"Last Longer. Switch to Parallel Mode for longer Vaping time and exceptional power from two 18650 batteries".

The vape shop also said that the voltage sag at parallel connection is spread out over the two batteries in Parallel.Thus more vaping time than using a series connection.

Okey I made the calculations for voltage sag using for example two Sony VTC5A 18650 batteries with a DC Internal Resistance = 18.6mOhms (0.018 ohm).

I got the same voltage sag 0.378 V in both configurations (0.1 build in parallel-0.4 build in series).

Am i correct or am I missing something?(i'll send to the vape shop the link for this thread so they can read your opinions because i think they believe i'm talking bulls..t!  

Hi. I have just purchased the heavy hitter mech mod.
The coils I bought are wotofo .28 dual core fused claptons.
It is a asgard mini RDA, it will be a dual coil build , so resistance should be .14
Will a Samsung 40t battery be ok with this build.
In regards to saftey and amp draw.
Thanks  

Ok I'm hoping I don't get heat for these questions/statements but educating ones self especially with something that is still very new is important to me.

1. Read some articles on how there is second hand vape similar to cigarettes (99% better mind you) what are your thoughts? Vaping may not be as safe as smokers think, research suggests | Society | The Guardian

2. Formaldehyde found in builds running at high watts/voltage? But 0% at low/normal builds, what i can't seem to find is whats considered to high for a Mechanical Mod or even for a V/W, V/V Setup? My normal build for a mech mod is twisted single coil 24 gauge 6-7 wraps, usually gets about 0.28 ohms and single coil 8 wraps of 24 gauge puts out 0.73 ohms on my flavor builds.
Before You Vape: High levels of Formaldehyde Hidden in E-Cigs - NBC News  

Hey all, I've been vaping for 3 months. I DIY and I have been using the same flavors, vg, pg and nicotine and I have never had a problem. But the last few days I have been getting a tight chest and it hurts and makes me cough when I inhale? At first I thought it was the custard, but it is happening with fruits too. So I am wondering if my current build in my RDA could be the problem? It's a simple single coil build 10 wraps for 1.5 ohms and I usually run it at 4.7volts. Couls someone give me some insight into this? is it possible my build has a short that I am not aware of? ohms are not jumping and it heats evenly. So I don't know.

Please help! Ive invest a lot of money into vaping and I dont want to stop.  

I've been using only twin-18650 mods for some time, and before the shipping ban came into effect, I bought a backup of my most-used mod (a Geekvape Aegis X), but since the 100W single 21700 / 18650 Voopoo Drag X Plus was only $35, I also picked up one of them as another backup.

I vape exclusively on RDA's, typically with a 3mm dual coil twisted build with 24 or 26 gauge Kanthal or nichrome-80. 5 or 6 wraps with 24 gauge, 6-8 wraps with 26 gauge. I typically vape these between 90 and 110 watts.

I did not expect to get a 'true' 90-100 watts out of the Drag X, so I set a target of around 60 watts. I mounted a 3mm dual coil twisted 28 gauge build with 6 wraps, which on my Aegis X vapes great at 60 watts, and very good at 50 watts. It measures at 0.45 ohms.

But on the Drag at 60 watts, it only vapes at what feels like 30 watts on my Aegis. Setting it higher makes no difference either, it seems to 'top out' at ~30 watts regardless of the setting. 60 watts @ 0.45 ohms is only around 11 amps, so I doubt I'm hitting an amperage limit.

I am using 18650 batteries (VTC5A), and it is about time to replace them, as I am only getting around 70% the battery life as I did when new. I will be picking up some 21700 batteries at the same time, which hopefully help with things on the Voopoo.

Does anybody have any good experiences with ~60 watt builds on a Drag X Plus?  

So I built a twisted build out of nichrome 60 wire and tried it on a triple series 18650 mechanical box and it melted the coils why won't nichrome work with any series boxes 8.4 volt melted 12.6 volt melted but I can build a .06 nichrome build and run it on my mech tube mod and it handles it I can build .15 and run it at 150 watts on my Sigelei and it handles it but bump up the voltage and it melts don't get it. I ran a .30 nichrome build at 260 watts on a SMY 260 and had no failure of the coil so I'm puzzled why a series mech box desemates the coils?  

Hey forum folks. I got lucky enough to win beyond vape's monthly prize and chose the neptune V1 hybrid mech mod. It will be making its way to me soon but in the mean time I need to get all the various goodies to make use of it. I need some recommendations for battery, battery charger, and dual coil build for the 3post rda that is built into it as this is my first rda and mech mod.

Thanks in advance  

Hey Guys,

I have been wanting to use a mech mod for quite some time now. But I didn’t want to rush into things, given that they can be dangerous if not used properly.

To prepare I have studied ohm’s law and have a pretty decent grasp on it. And have a calculator app on my phone.

I have checked out Mooch’s battery recommendations and have a good idea of what batteries to use and which to avoid.

I still do have a few questions I was hoping an experienced Mech user could help me answer:

- What would be the “sweet spot” as far as resistance and safety go for a dual coil set up? Obviously I want to go as low as possible and have a hard hitting vape. But I also want to be safe. I plan to use a dual 18650 Parallel mod (The Clutch X18). I would be most likely be using Sony Murata batteries as I cant find any Samsungs where i live. I’m thinking somewhere around 0.17-0.2? Or would it be safe to go lower than that? I will of course test my build on an ohm reader and regulated mod before throwing it on the mech to be safe.

- Are there any other general safety tips? Ive heard that you want to screw the Atty down all the way first, before inserting the batteries. And then insert the batteries. And when removing the batteries i heard you want to slightly unscrew the atty first, and then carefully remove the batteries? Can anyone please confirm if this is correct.

- Is its safe to chain vape on a dual 18650 parallel mod? When I say chain vape I mean like maybe taking 5-6 big hits back to back. Then waiting 3-5 minutes, dripping some juice and then doing another 5-6 hits.

- Is there anything I should be monitoring while I’m vaping? Like the heat of the batteries? From what I’ve read, the batteries drain quite fast on a mech. And after some experience you will just kind of know when they need charging because the vape experience changes. Is there anything I’m missing? Or something i should be looking out for?

- I can only vape in my kitchen. And sometimes there might be a little bit of water on the counter from someone’s drink sweating, or drops after someone washed their hands etc. Is this a risk? I will of course do my best to keep all surfaces dry. I’m not talking about large amounts of water or submerging or getting the mod really wet. But just what one might find on a kitchen counter.

- Any other tips you could throw my way would be great!

Thanks in advance!  

I have a dna75 single 18650 that I take out with me.
I just ordered a bunch of small'ish MTL clones to use with it (Spica, Prime, V5, Millie, Gate).

I also have a DNA250C triple 18650 that I use at home.

I never used TC and don't really want to learn it nor power curves but might have to learn that later if I feel the need to. I already prefer and am grateful for escribe customization so maybe TC and curves won't be a PITA to add.

I couldn't get DNA250C's idiot-proof Replay Mode to work the one time I tried it with a dual SS fused clapton (others have had this problem, maybe it was the tank I was using).

For DNA250C bigger builds, I just ordered an Aromamizer V2 Plus RTA. And a Fatality 25mm. Fatality I might also use on the DNA75 with a smaller coil so battery easily lasts a day.


I'm guessing for the smaller MTL tanks to get round 316L if I do TC, and for wattage mode some Kanthal. I'm OK with even buying a DNA75C for Replay mode if the MOD is small sized though.

I really don't like ramp up time even with smaller coils, so maybe I should just learn TC and get 316L wire? For the DNA250C builds, ramp up would be long but I'm hoping Replay Mode will easily solve that.

Not sure which gauges.

And/or maybe for the MTL smaller builds get some thin clapton or something besides round? I don't want to kill the battery fast though but am OK with smaller puffs.


I already have some all-SS 316L Geek Vape Fused Clapton 26ga * 2 + 30ga, so that should be good for the bigger builds and Replay.



Thank you  

Hi guys,

Is it really normal for an atomizer to get hot especially when using dual coils?
I just created a dual coil a couple of minutes ago using 24 gauge kanthal wire, 10 wraps each on a 2.4mm precision screw driver. My meter shows that the resistance is at 0.4 ohms, being curious and all since this is the first time that I made a dual coil, i decided to test it out.
Got some good flavor and vapor, though the vapor is warmer than I would want it to be ( I prefer cold vapor)

After taking a couple of 5 secs drag, I notice that my atomizer became hot, not warm, but hot. Is this something that I should be concerned about? I am doing something wrong or have I done something wrong when creating my coils?
Please help.

Here are some pictures of my device and atomizer. ( Philbox wood mod running on 2 pcs of AWT 18650 2600mah battery, my atty is Haze by vapehead origins)