Amp to ohms question

[surf472]

So i'm running a micro 24 awg 5 wrap quad coil build, and I tested two batteries which led me to this question.
I have 20 amp batteries which are samsung 25r batteries
I also have Impren 38 amp batteries

I used steam engine calculator and it said that my amps with my ohms (which is 0.075) is about 46 amps of a draw.
Does this mean that unless I use a 46 amp setup I won't get the full potential out of my build? I do notice that the impren's heat up faster than the samsungs.

Let me add, since im using an unregulated mod they should theoretically heat up the coils the same time not mattering what battery I use, but the impren's heat up noticably faster.

 

[The Cromwell]

The imren 46 amp is not a true 46 amp battery. there are NO 18650's with over 30 amps CDR.
For that build you will need a dual paralell battery mod.
Using that build with a single battery will be somewhat dangerous.

Check here.
https://www.e-cigarette-forum.com/forum/blogs/mooch.256958/

 

[Mythical_OD]

Isnt it totally dangerous using a 20 amp battery at 40 some amps? Isnt that exactly what causes batteries to explode/vent?

 

[The Cromwell]

Isnt it totally dangerous using a 20 amp battery at 40 some amps? Isnt that exactly what causes batteries to explode/vent?

Yep. Now if you want to wind up in the news with blown out teeth and such be stupid and vape 46 amps on a 20 amp battery or less.
Here is a list of valid CDR ratings for 18650 batteries. From Mooch a trusted battery expert.

 

[Mythical_OD]

I thought so lol, what you posted had me second guessing myself for a second. In a dual battery set up running parallel, how are the amps affected?

 

[The Cromwell]

I thought so lol, what you posted had me second guessing myself for a second. In a dual battery set up running parallel, how are the amps affected?

You get twice the amps of one of the batteries. Always use a matched pair of batteries in a parallel battery setup. Same battery and always used together. Do not mix and match the batteries or you may also get bad results.
People call this marrying the batteries. Mark them as set a for instance and always use them together and charge together, etc.

for the build the OP was talking about you would need 2 true 25 or 30 amp batteries from Mooch's list.

Best way is to use a regulated 200 watt 3 battery mod like the RX200 with at least 20 amp batteries in there.

 

[DED420]

So i'm running a micro 24 awg 5 wrap quad coil build, and I tested two batteries which led me to this question.
I have 20 amp batteries which are samsung 25r batteries
I also have Impren 38 amp batteries
I used steam engine calculator and it said that my amps with my ohms (which is 0.075) is about 46 amps of a draw.
Does this mean that unless I use a 46 amp setup I won't get the full potential out of my build? I do notice that the impren's heat up faster than the samsungs.
Let me add, since im using an unregulated mod they should theoretically heat up the coils the same time not mattering what battery I use, but the impren's heat up noticably faster.

First off, STOP WHAT THE FUCK YOU'RE DOING!!!!!!!RIGHT FUCKING NOW!!!!! are you fucking kidding? 0.075ohm build? On a Mech? WTF!!!!! You wanna die or something?

First off, there are no 18650 batteries capable of more than 30A CDR. Those Imren batteries are 20A cells, if you're lucky (15A-20A tops). The fact that the batteries were heating up was a good sign that your build was too low, and the fact the Imren is heating up notably faster should have obviously told you that no, they are not 38A, not even close. Stick with the OEMs (LG, Samsung, Sony), everything else is a re-wrap, with inflated specs.

A build that low should never even be tried on a mech, and there's very few regulated mods that can fire that low as it is. A single cell mech mod should never be built below 0.15ohm.

And no, you're theoretical thought is incorrect. In a mech, a battery with a higher Amp discharge rate will ramp up faster than a lower Amp cell will. So a VTC4 (30A) will ramp up a coil faster than a LG HG2 (20A).

Please, PLEASE, for your own safety, and everyone elses, put down the mech, and don't pick it back up until you thoroughly study up on Ohms Law and Battery Safety.

I thought so lol, what you posted had me second guessing myself for a second. In a dual battery set up running parallel, how are the amps affected?

A dual battery setup will give you double the Mah, but not double the Amps unfortunately. In real world applications, it'll only give you about a 50% increase in Amps (1.5x the Amps). So two 30A cells in parallel, will give you about 45A, not 60A.

 

[The Cromwell]

First off, STOP WHAT THE FUCK YOU'RE DOING!!!!!!!RIGHT FUCKING NOW!!!!! are you fucking kidding? 0.075ohm build? On a Mech? WTF!!!!! You wanna die or something?

First off, there are no 18650 batteries capable of more than 30A CDR. Those Imren batteries are 20A cells, if you're lucky (15A-20A tops). The fact that the batteries were heating up was a good sign that your build was too low, and the fact the Imren is heating up notably faster should have obviously told you that no, they are not 38A, not even close. Stick with the OEMs (LG, Samsung, Sony), everything else is a re-wrap, with inflated specs.

A build that low should never even be tried on a mech, and there's very few regulated mods that can fire that low as it is. A single cell mech mod should never be built below 0.15ohm.

And no, you're theoretical thought is incorrect. A battery with a higher Amp discharge rate will ramp up faster than a lower Amp cell will. So a VTC4 (30A) will ramp up a coil faster than a LG HG2 (20A).

Please, PLEASE, for your own safety, and everyone elses, put down the mech, and don't pick it back up until you thoroughly study up on Ohms Law and Battery Safety.



A dual battery setup will give you double the Mah, but not double the Amps unfortunately. In real world applications, it'll only give you about a 50% increase in Amps (1.5x the Amps). So two 30A cells in parallel, will give you about 45A, not 60A.

Technically 2 batteries in parallel will double the amps but it is not advisable to go over 50% above the rating of one of the cells due to possible connection issues with one of the cells.

 

[Mythical_OD]

You get twice the amps of one of the batteries. Always use a matched pair of batteries in a parallel battery setup. Same battery and always used together. Do not mix and match the batteries or you may also get bad results.
People call this marrying the batteries. Mark them as set a for instance and always use them together and charge together, etc.

for the build the OP was talking about you would need 2 true 25 or 30 amp batteries from Mooch's list.

Best way is to use a regulated 200 watt 3 battery mod like the RX200 with at least 20 amp batteries in there.

So my RX200 with the Sony VTC4s has a higher CDR than the 30A the batteries are individually? Just when I thought I had the whole thing figured out lol

And to the OP, hopefully you havent blown your face apart or burned down your house yet and stopped to take the advice given. You were for sure on the fast track to a hospital stay and a really embarrassing news article about you.

 

[DED420]

So my RX200 with the Sony VTC4s has a higher CDR than the 30A the batteries are individually? Just when I thought I had the whole thing figured out lol

The RX200 is a Para-Series mod, so you're getting the best of both worlds, Higher Mah, Higher Amps, Higher Volts, The Whole Package

 

[Mythical_OD]

Reallly? Ive been going on thinking Ive got 30 amps max, and I like keeping a large buffer just to be safe. So what am I working with if Ive got 3 30A CDR batteries in it?

 

[The Cromwell]

So my RX200 with the Sony VTC4s has a higher CDR than the 30A the batteries are individually? Just when I thought I had the whole thing figured out lol

And to the OP, hopefully you havent blown your face apart or burned down your house yet and stopped to take the advice given. You were for sure on the fast track to a hospital stay and a really embarrassing news article about you.

Same current limit just 3X the voltage which using ohms law equates to more watts.
the RX200 has 3 batteries in series not paralell.
In series the current does not increase just the voltage.

 

[vuJim]

So my RX200 with the Sony VTC4s has a higher CDR than the 30A the batteries are individually?

The individual batteries may have a CDR of 30A, but, when you're talking about a regulated mod, the CDR of the system may be higher. It all depends upon circuit design.

 

[The Cromwell]

Watts iz watts. A fully charged 30 amp CDR 18650 is capable of 126 watts per ohms law. the same battery at 3.2 volts is capable of 96 watts.
Note that the atty resistance for the fully charged battery is .14 ohms, and the resistance for the 3.2 volt battery is .1 ohms for the max wattages.
In regulated mods always subtract around 10% for converter inefficiency.

 

[surf472]

Alright, Maybe I should have been more clear. My bad. The mod is a tugboat box mod. Not a mech.
This is where I got my batteries, its a local store: http://www.1stwavevapor.com/shop/batteries/imren-18650/
I do run it with 2 of those batteries

 

[JERUS]

So my RX200 with the Sony VTC4s has a higher CDR than the 30A the batteries are individually? Just when I thought I had the whole thing figured out lol

And to the OP, hopefully you havent blown your face apart or burned down your house yet and stopped to take the advice given. You were for sure on the fast track to a hospital stay and a really embarrassing news article about you.

Parallel you add amps (and mAH), series you add voltage. In regulated mods they have a chip that will convert the voltage into amps, which is why regulated mods work in series. With 3 batteries you have 4.2vX3 to work with, the chip can convert that for you, but basically you get 12.6v*20amps = 252w of potential to work with and the mod will make it work. Different mods use different chips and have different restrictions. For instance the Cuboid will only give you a max of 25amps, it will give you that whether you use 20amp cells or 30amp cells, it'll limit you to 25amps. Other mods will convert better, for instance the Hohm Wrecker g2 will fire well below .1Ω because it doesn't have a problem converting the voltage into higher amps. You have incoming and outgoing currents, it'll take the 20amps and 8.4v and turn it into say 5v and 30amps you need for a .165Ω coil at 150w.

So that's why it's best to use regulated mods on lower ohm builds, it's not asking that the battery puts out the 30amps, it's asking the batteries to give it their voltage and a safe amount of current so it can tweak them into the correct settings. Still ill advised to get crazy there, you can actually feel your mod heating up if you push it, and that's a bad sign (I've only heard of one issue with a regulated mod, and that was using shitty efest/imren batteries that were likely 15amp or less).

 

[The Cromwell]

Alright, Maybe I should have been more clear. My bad. The mod is a tugboat box mod. Not a mech.
This is where I got my batteries, its a local store: http://www.1stwavevapor.com/shop/batteries/imren-18650/
I do run it with 2 of those batteries

I thought Tugboat box mods were mechs? Not regulated. Or at best Mosfet fired mods. You can adjust the wattage on them?

 

[JERUS]

Alright, Maybe I should have been more clear. My bad. The mod is a tugboat box mod. Not a mech.
This is where I got my batteries, its a local store: http://www.1stwavevapor.com/shop/batteries/imren-18650/
I do run it with 2 of those batteries

You'll still want different batteries. I'd suggest LG HB2's, they're the highest power batteries out there, but they don't last long at 1500mAH. At best those imren's are 20amps, so that means your limit is less than 40amps (less than because we KNOW there is loss in the system, but not how much so general rule is 50% on the additional battery so 30amps is where you should limit yourself).

With the HB2's you should be able to push 50amps without an issue. But stress on the "should" safety rules say 45amp limit, but realistically when factoring in pulsing vs continuous and the whole 50% rule being just a general rule of thumb leaning on the side of safety, you should be safe. I'd still recommend upping the resistance. You could probably get a better vape doing something different with the coils without having to hit that resistance.

 

[JERUS]

I thought Tugboat box mods were mechs? Not regulated. Or at best Mosfet fired mods. You can adjust the wattage on them?

It is a mech, OP needs to learn some stuff. Not trying to offend but really surf472 for your own safety and those around you do some research, it's worthwhile.

 

[The Cromwell]

Illum supply has VTC 4's.