sub ohming with 18490s

[Steven Pettit]

Is it dangerous? I'm pushing around .5 ohms on a dual coil octopus rda and was told recently that I was pushing the envelope as far as safety goes. I don't like the 650 stance I prefer a more compact mod but I'm far more concerned for my health than I am about my vape Aesthetics. Sooo is it dangerous? Yes/No and why.

 

[bacc.vap]

Which 18490 are you refering to? What's the amp limit?

4.2volts through a .5 ohm atty is drawing 8.4 amps. (35.28 watts)

 

[Papajohns]

If you go over the amp limit of your battery, it could melt or explode.

 

[30+Years]

Can't help you but why didn't you just post this in the first place instead of all those other threads?

 

[Steven Pettit]

Not sure of the brand.
Says 3.7v 1100 mAh (4.1WH)

 

[Steven Pettit]

I'm an idiot and don't understand forums yet lol

 

[K-Omo]

Can you take them out and look at brand?

 

[Steven Pettit]

I'm looking at them now. The only thing written on them is the info above and a sticker that says AW

 

[Steven Pettit]

They are red too btw

 

[bacc.vap]

I'm an idiot and don't understand forums yet lol

No problem, were all idiots. Does the battery have the C rating on it? The only way to tell for sure is to have the specs for the specific battery you are using, many manufactureres make 18490 batteries and they're not all the same.

 

[Steven Pettit]

Looked it up online. Says they are rated 16.4 amp. I'm doubling that..
But even with a 650 I'm still

 

[TheReign]

judging by the way you described the battery i would doubt that it's safe to use for subohming.. You Really want to have some good batteries when your into the subohming district

 

[Steven Pettit]

Rated at 16.4 amps. I'm good

 

[Steven Pettit]

I'm planning on getting Sony 650. 24 amp rating. Then I'll feel completely comfortable.

 

[TheReign]

Your already halfway there Lol. Exactly my point, I wouldn't be subohming at all without my sony 30AMP vtc4's.

 

[bacc.vap]

Seems like there are 2 different C ratings being listed for AW IMR 18490's, 15 and 8. You'd be good if it was 15, but right on the line if it was 8. Multiply the battery's mah by the C rating to get the max amp rating.

 

[Steven Pettit]

Where do I find my c rating?

 

[K-Omo]

Why don't you use a 2cent fuse until you get higher amp battery's? Don't cost much and could save your face. At least it will shut off firing if you have a short. I will say at least your using IMR safer chemistry battery.

I am not sure of where to find c rating...the place you bought the AW battery from should have those specs.

 

[bacc.vap]

Where do I find my c rating?

That's what I've been looking for around the web, and I find different vendors listing different C ratings. Look on this link, two different vendors selling the same batteries and using a different rating. http://www.e-cigarette-forum.com/fo...different-max-cont-discharge-rates-print.html My guess is the real rating is the lower one, but I don't know, never used the 18490.

If I were you, I would'nt use it for the setup you described.

 

[K-Omo]

By Trlrtrash13
The reason why a short is dangerous is it creates an amp overload in the battery, causing it to discharge whatever power it has in it trying to fire the device. What the fuse does is measure the amps coming out of the battery and shut it off if it recognizes a short. Unfortunately, the vape safe has a 7 amp limit so it will recognize pretty much all sub ohm dual coils and most low sub ohm single coils as a short. It is going to really restrict your sub ohm vaping if you try to use it.

Are you doing sub ohm dual coils? If so I posted a piece of info the other day on how to tell how many amps you are using. I called a friend of mine today who works with circuits and had him look at it and he said it was a layman way of wording it but it was "not incorrect." Lol. You can read the whole thing here, but the long and short of it as it affects you is figure the ohms of your dual coil build and double it. This is because a .5 ohm dual coil is 2 1 ohm coils. Then in the Ohm's Law Calculator enter your voltage at 4.2 and your ohms at 1 (for a .5 dual). This will tell you how many amps each coil is getting, so double that number and it will tell you how many amps the atomizer is using. A .5 ohm dual coil atomizer will use 8.4 amps.

I do a lot of sub ohm vaping, and what I do is ALWAYS (need it or not) use the highest amp rating battery I can find and ONLY use safer chemistry batteries bought from a trusted vendor. I only use my 30 amp batteries when using sub ohm coils. If a battery, mod, or switch gets hot then stop vaping. Get your ohm meter and check the atomizer. Don't use the resistance checker on your mod for the ohms, get an ohm meter for e-cigs with 510 threading. This will allow you to screw it in, turn it on, and then tap on the posts with it on. If your reading jumps around when you tap the posts, you have a problem. Either a loose connection or a coil hitting the post.

The important thing to remember is that sub ohm vaping isn't safe. That having been said, you can be safe while sub ohm vaping. Know your battery, test your atomizer regularly, and always be aware and sensitive to what is happening with your mod. That is the best thing I can tell you if you wish to proceed. The problem with fuses and protected batteries is they are designed to prevent the battery from firing in a short. In sub ohm vaping you are getting close enough to a short for the protection to step in and prevent you from doing what you are trying to do.

I got this from another forum on subohming