TFV4 .15ohm mech mod safety

[jmgreetis]

So I just recently purchased the smok TFV4 and wanted to use the .15ohm coil head that it came with in my penny mech mod. I'm using brand new LG HE2 batteries. Basically I was a little worried that it might not be safe. I tried using one of those Ohm's law calculators and was even more confused afterward. Am I safe to use this setup or should I go a bit higher on the ohms. I used the .2ohm coil head it came with for the past several days with no issues.

 

[Rabbit Slayer]

I think you want the LG HB4 or HB6, if I'm not mistaken, they are 30A

the 1500mAh ones in any case

 

[IMFire3605]

So I just recently purchased the Smok TFV4 and wanted to use the .15ohm coil head that it came with in my penny mech mod. I'm using brand new LG HE2 batteries. Basically I was a little worried that it might not be safe. I tried using one of those Ohm's law calculators and was even more confused afterward. Am I safe to use this setup or should I go a bit higher on the ohms. I used the .2ohm coil head it came with for the past several days with no issues.

"NO NO NO NO, JUST NO..."

0.14ohms on a mech at fresh charge is full 30amps CDR, that leaves no room for error and you will tear up your batteries quickly, lowest on a mech single battery mod is 0.25ohms with a Sony VTC3, LG HB6, or Sony VTC4, maybe 0.2ohms on a dual battery box with 20amp batteries, the LG HE2 is 20amp CDR so that 0.15ohm coil is way out of spec for max CDR the battery can handle safely being it is 20amp CDR.

Be smart and safe out there. Wanting to run that 0.15ohm TFV4 get a Sigelei 150 or Fuchai 200watt, even a Snow Wolf 200watt or Smok Xcube 2 will safely run that coil as that is what the TFV4 was designed to run on, not a mech.

 

[crxess]

So I just recently purchased the Smok TFV4 and wanted to use the .15ohm coil head that it came with in my penny mech mod. I'm using brand new LG HE2 batteries. Basically I was a little worried that it might not be safe. I tried using one of those Ohm's law calculators and was even more confused afterward. Am I safe to use this setup or should I go a bit higher on the ohms. I used the .2ohm coil head it came with for the past several days with no issues.

Mechanical Mod is not powerful enough to get full potential from Either of those coils and is putting you near the Limit of todays batteries for Bottom performance levels.
The Tank and coil were designed to handle 80w+

Recommendation - Dual Battery Regulated Mod for that Tank.

LG - HE2, HE4, HG2 are all 20A Batteries
No Listing found for a HE6

Sony VTC4 is a 30A Battery Low mAh rated, carry spares.

 

[sig-cmt]

How far does the positive pin protrude on a TFV4? I had one, but gave it away a few months ago. Wasn't the guy in Arkansas who blew his face up using a TFV4 on a tube mech?

 

[crxess]

How far does the positive pin protrude on a TFV4? I had one, but gave it away a few months ago. Wasn't the guy in Arkansas who blew his face up using a TFV4 on a tube mech?

Last one I read up on, I believe, was the Subtank.

 

[Rabbit Slayer]

Opps, HB2 and HB6, not HE

LG HB2 30A 1500mAh 18650 Bench Test Results...a true 30A battery, along with the HB6

 

[WattWick]

First things first,

If you are confused by Ohms law calculators, using a mech mod is not safe. The only safety any mech has is your understanding of how they work and your ability to determine whether you are doing things safely or not.

It's not about 'yes or no' answers. It's about the sum of it all. Using the right batteries. Not pushing batteries to the point of immediate failure or "just" to the point of rapid deterioration. Checking for potential short circuits in the mod, atty, and any connection between the two. Proper venting. ...and possibly more that I may forget off the top of my head. In short, you need to know what's going on, what to look for, what to do - and more importantly, what not to do.

Not trying to put anyone down. Just trying to emphasize how important it is to understand - not just know - when dealing with mechs.

 

[EverPresentNoob]

Just a little math for ya...

Fully charged 18650 4.3 volts. To find watts you multiply volts X volts / coil resistance...

4.3 x 4.3 / .15 = 123.26666

For amp load it is watts / voltage

123.266666 / 4.3 = 28.66666

you are right at the limit. I wouldnt use that at all. not on a mech. Yea you can look at it and say well my batts are 30 amp and thats only pulling 29 amps so i have a one amp cushion. Have your cells degraded? there is just NO room for error.

 

[Hans Wermhat]

Wasn't the guy in Arkansas who blew his face up using a TFV4 on a tube mech?

Yep. .25 ohms is the absolute bare bottom limit on a mech for me. Even with a true 30A battery. There's just no sense in going lower than that anyway. All you do is make the vape too hot to inhale it.

 

[tj99959]

A real problem with going that low with the resistance is what happens as your battery ages, and at the amperage required for that build a battery will age real fast.
The problem is that as a battery ages the mAh of the battery declines, as the mAh of the battery declines so does it's CDR. The end result is that by abusing a battery with such a high amperage requirement, in just a matter of weeks your 30a battery may only be a 15a battery.

add:

 

[crxess]

A real problem with going that low with the resistance is what happens as your battery ages, and at the amperage required for that build a battery will age real fast.
The problem is that as a battery ages the mAh of the battery declines, as the mAh of the battery declines so does it's CDR. The end result is that by abusing a battery with such a high amperage requirement, in just a matter of weeks your 30a battery may only be a 15a battery.

add:

Had to Grab that Meme

It is So Fitting............So Often

 

[jmgreetis]

So you're saying I shouldn't use the .15ohm coil then? I will just go back to

First things first,

If you are confused by Ohms law calculators, using a mech mod is not safe. The only safety any mech has is your understanding of how they work and your ability to determine whether you are doing things safely or not.

It's not about 'yes or no' answers. It's about the sum of it all. Using the right batteries. Not pushing batteries to the point of immediate failure or "just" to the point of rapid deterioration. Checking for potential short circuits in the mod, atty, and any connection between the two. Proper venting. ...and possibly more that I may forget off the top of my head. In short, you need to know what's going on, what to look for, what to do - and more importantly, what not to do.

Not trying to put anyone down. Just trying to emphasize how important it is to understand - not just know - when dealing with mechs.

I was just unsure at the time when using the ohms law calculator. Since my original post, I've removed the .15ohm coil. Replaced it with the dual coil rba with a .7ohm coil(my usual). And have began studying up on ohms law and more on batteries. I'm not your average ......, although I am a bit slow at times. So I knew that I was probably taking a risk with the .15ohm coil, which is why I only took a few pulls from it before I thought better of it and decided to come here and ask.

Normally I wouldn't even consider using a build as low as .15 or even lower than the .5ish range. And I know that I'd be better off using a regulated mod with the pre-built sub-ohm coils that can be purchased for the TFV4. But, I'm broke and want to get a nice regulated device. Which is why I purchased the dual coil RBA along with the tank. So I can keep my builds on the safe side until I can afford said regulated device.

Thank you for the help, I do appreciate it. From everyone.

 

[Zakillah]

Everything below 0,2 is stupid for a single 18650 mech IMO, even with the right batteries.
Just do the math.