new to rda's and need some advice/help

[Newportlocal]

These might be interesting for you if you haven't seen them.
Rip Tripper
Cloud chasing 101
https://m.youtube.com/watch?v=NfqSh03FEys
Cloud chasing 101 part 2
https://m.youtube.com/watch?v=CePIUN2-JiA

 

[Susan~S]

Im new to the whole RDA's thing. I had a few questions about sub ohm vaping. To anyone active please read this... I need help! Im sub-ohm vaping on .20ga kanthal A1. I'm using a dual 4 wrap coil with cotton bedding and I will say it chucks vapor and thats an understatement. The problem I am having is the whole mod itself starts to heat up fairly quickly. I dont know why that is... Im using a 35amp 2500mah efest and I change it out fairly often i have re-drilled my holes and there pretty freakin big. I always adjust my airflow to go through the coils too. Yeah I also tried raising my coils higher it still gets warm. Any advice please respond ASAP.

The batteries you are using are UNSAFE for vaping at 0.09ohms. The purple 18650 2500mAh 35A* EFest batteries are really rebranded LG18650HE2 2500mAh 20 amp* batteries. You need to raise the ohms of your builds to stay well within the 20amp limitation of that battery.

Battery Basics for Mods: IMR or Protected ICR?

 

[Baditude]

Im new to the whole RDA's thing. I had a few questions about sub ohm vaping. To anyone active please read this... I need help! Im sub-ohm vaping on .20ga kanthal A1. I'm using a dual 4 wrap coil with cotton bedding and I will say it chucks vapor and thats an understatement. The problem I am having is the whole mod itself starts to heat up fairly quickly. I dont know why that is... Im using a 35amp 2500mah efest and I change it out fairly often i have re-drilled my holes and there pretty freakin big. I always adjust my airflow to go through the coils too. Yeah I also tried raising my coils higher it still gets warm. Any advice please respond ASAP.

Oh if it helps its also clocked in at .09 ohms

I'll jump back in here again.

• First off, I don't advise anyone new to sub-ohm to be making coils below 0.8 ohms until you know what you are doing. Since your mod is getting hot and you don't know why or how to investigate why, this says to me that you don't know what you are doing yet. Tear down that coil and rebuild to a much higher resistance.
  
  
• Second off, although advertised by Efest that your purple battery is a 35 amp battery, it's been found via independent reviewers/testers that this battery is a re-branded LG18650HE2 battery that is only a 20 amp continuous discharge rate. Purple Efest Batteries?
  
  
• Third, 0.09 ohms is pulling 46.6 amps from your battery and heating your coil to 196 watts!! That is way over the actual amp limit of your battery. Learn Ohm's Law or at the very least how to use an Ohm's Law Calculator. You're currently playing with fire, Sonny. Ohm's Law Calculator
  
  
• There is no 18650 battery available on the market which can safely fire a 0.09 ohm coil, not even a Sony VTC battery (legit 30 amp continuous discharge rate).
  
  
• Fourth, You are putting a lot of faith into an inexpensive meter to read your coil precisely and accurately. Even if accurate, you are only 0.09 ohms away from a dead-shorted battery. Do you know what that means?

1.0 ohm = 4.2 amp draw
0.9 ohm = 4.6 amp draw
0.8 ohm = 5.2 amp draw
0.7 ohms = 6 amp draw
0.6 ohms = 7 amp draw
0.5 ohms = 8.4 amp draw
0.4 ohms = 10.5 amp draw
0.3 ohms = 14.0 amp draw
0.2 ohms = 21.0 amp draw
0.1 ohms = 42.0 amp draw
0.0 ohms = dead short = battery in thermal runaway

 

[tayone415]

Quick question: What is the amp rating of your battery?

Pretty sure that you have no idea. You should never use a battery firing sub-ohm coils if you don't know the amp rating of that battery. Just as you should never fire a coil that you don't know the ohms measured by an ohm reader or digital multimeter.

This is a basic sub-ohm vaping rule that can not be broken.

I did a google search for a Kamray 2000mah battery. I believe it is an IMR battery but couldn't find an amp rating for it. A 0.4 - 0.5 ohm coil resistance is probably TOO LOW for that battery, and is most likely the reason your mod, switch, and battery are getting warm and you are not getting any vapor. Do not use this battery at that coil resistance... or what you see in the below pictures could happen to you.

View attachment 361065View attachment 361066

Get yourself an appropriate 30 amp battery like the Sony VTC.

View attachment 361067

Notice how in the below table how the lower you go in ohms the higher the amp draw is from the battery. Drawing more amps than the battery has can cause the battery to go into thermal runaway and vent hot gas and swell inside of your mod ... possibly to the point of explosion.

1.0 ohm = 4.2 amp draw
0.9 ohm = 4.6 amp draw
0.8 ohm = 5.2 amp draw
0.7 ohms = 6 amp draw
0.6 ohms = 7 amp draw
0.5 ohms = 8.4 amp draw
0.4 ohms = 10.5 amp draw
0.3 ohms = 14.0 amp draw
0.2 ohms = 21.0 amp draw
0.1 ohms = 42.0 amp draw

I went through the page thinking seriously no one mentioned not sub-ohming on a Kamry battery.

A hot button could be caused by a hotspot(s) on the coils, or stressing the battery beyond what it can handle. Like Baditude said get a 30 amp battery the VTC series is great and I haven't had a hot battery yet just warm with VTC5s with low sub-ohm builds.

 

[tayone415]

I'll jump back in here again.

• First off, I don't advise anyone new to sub-ohm to be making coils below 0.8 ohms until you know what you are doing. Since your mod is getting hot and you don't know why or how to investigate why, this says to me that you don't know what you are doing yet. Tear down that coil and rebuild to a much higher resistance.
  
  
• Second off, although advertised by Efest that your purple battery is a 35 amp battery, it's been found via independent reviewers/testers that this battery is a re-branded LG18650HE2 battery that is only a 20 amp continuous discharge rate. Purple Efest Batteries?
  
  
• Third, 0.09 ohms is pulling 46.6 amps from your battery and heating your coil to 196 watts!! That is way over the actual amp limit of your battery. Learn Ohm's Law or at the very least how to use an Ohm's Law Calculator. You're currently playing with fire, Sonny. Ohm's Law Calculator
  
  
• There is no 18650 battery available on the market which can safely fire a 0.09 ohm coil, not even a Sony VTC battery (legit 30 amp continuous discharge rate).
  
  
• Fourth, You are putting a lot of faith into an inexpensive meter to read your coil precisely and accurately. Even if accurate, you are only 0.09 ohms away from a dead-shorted battery. Do you know what that means?

1.0 ohm = 4.2 amp draw
0.9 ohm = 4.6 amp draw
0.8 ohm = 5.2 amp draw
0.7 ohms = 6 amp draw
0.6 ohms = 7 amp draw
0.5 ohms = 8.4 amp draw
0.4 ohms = 10.5 amp draw
0.3 ohms = 14.0 amp draw
0.2 ohms = 21.0 amp draw
0.1 ohms = 42.0 amp draw
0.0 ohms = dead short = battery in thermal runaway

Baditude would you mind if I sent you a PM about this? I don't want to post something to encourage the OP or other new members or new sub-ohmers to do riskier builds.

 

[tayone415]

The batteries you are using are UNSAFE for vaping at 0.09ohms. The purple 18650 2500mAh 35A* EFest batteries are really rebranded LG18650HE2 2500mAh 20 amp* batteries. You need to raise the ohms of your builds to stay well within the 20amp limitation of that battery.

Battery Basics for Mods: IMR or Protected ICR?

I don't trust Efest's ratings, just curious where did you get that info, I remember getting into a debate with another member he claimed it was a 35 amp battery with a ridiculous burst rate.

 

[Baditude]

I don't trust Efest's ratings, just curious where did you get that info, I remember getting into a debate with another member he claimed it was a 35 amp battery with a ridiculous burst rate.

This info was already given in post #25 here: Purple Efest Batteries Read the entire thread.

 

[tayone415]

This info was already given in post #25 here: Purple Efest Batteries Read the entire thread.

Thanks, I actually stumbled on that thread a couple weeks ago, just didn't notice where the info came from outside of ECF. But, no worries was just curious but I'm staying clear from Efest batteries.

 

[Susan~S]

I don't trust Efest's ratings, just curious where did you get that info, I remember getting into a debate with another member he claimed it was a 35 amp battery with a ridiculous burst rate.

From Baditude's blog post (look at his battery list at the top of the blog post): Battery Basics for Mods: IMR or Protected ICR?

And from another thread Baditude commented on. He makes reference to that thread in his post above (I've attached his quote below): "Purple Efest Batteries?"

[*]Second off, although advertised by Efest that your purple battery is a 35 amp battery, it's been found via independent reviewers/testers that this battery is a re-branded LG18650HE2 battery that is only a 20 amp continuous discharge rate. Purple Efest Batteries?

EDIT: Sorry for the duplication. I'm a one handed typer and it takes me a long time to pull stuff together.