ohms

[Pinggolfer]

Hi all new member here and I am new to the e cig life. I tried searching but I can't seem to find out information on ohms. I have a Kanger Evod with 1.8 ohms but I know they make a 2.5 ohm coil as well. I have no idea as to the difference it makes using one over the other.

Thanks

 

[MoparCharlie]

The 1.8 ohm coil will require less voltage to produce the same vapor as a 2.5 ohm coil.

If you are using a fixed voltage battery then a 1.8 ohm coil will give more vapor than a 2.5 ohm coil.

I like a 2.5 ohm coil over a 1.8 coil...less burnt taste whe chain vaping .

I go more for taste than for making the biggest cloud.

 

[Bob Lion54]

Ohms (sometimes denoted with the Ω symbol) is a measure of electrical resistance. The higher the ohms the more resistant to allowing electricity to flow. With less electricity passing through, you will get less friction resulting in less heating of the coil (a.k.a. the heating element, a.k.a. the thing that gets hot.)

Lower ohms means the coil will get hotter. Higher ohms means the coil will be cooler.

This is, of course, assuming the Voltage stays the same which it will unless you have a variable voltage battery. You'll know it's variable voltage (VV) if it has a twisting bottom or other buttons besides the fire button. (A VV device may also have a LED display.)

If it's not a VV device, choosing what ohm coils to use is just a matter of personal preference and how well the juices you are using work with them. Some juices can burn at higher temperatures, but some will taste much better warmer. It's up to you and your personal preference.

I won't really get into VV right now because it doesn't sound like you have one and I don't want to throw too much information at you.

Hopefully, that answers your question and no one else popped in with a better explanation while I was typing this.

 

[AttyPops]

If you're using a Variable Voltage e-cig....

Get the 2.5 ohm ones. VV allows you to adjust up or down as needed and the 1.8 doesn't give you enough room on the bottom end of the adjustment.

But either will work.

Lower ohms = hotter for any given voltage.
Lower ohms = less resistance = more current flow

If using a fixed voltage e-cig....you have to match the ohms to the volts. So you'd need to be specific.

 

[Baditude]

As others above me have alluded to, which ohm coils to choose depends upon the voltage you will be putting into it (fixed voltage or variable voltage), and also to your personal preference.

If using a fixed voltage battery (regular eGo or mechanical mod), it will put out an average between 3.4 - 3.7 volts. If you prefer a warmer vape, LR (low resistance 1.5 - 2.0 ohm) is your deal. If you prefer a cooler vape, SR (standard resistance 2.0 - 2.5 ohm) would be your choice.

If using a regulated mod (eGo Twist, eGo Spinner, or variable voltage/wattage mod), you would want a HR (high resistance 2.5 - 3.0 ohm) to take full advantage of the voltage range it can make.

Sorry vets, I'm bringing out the chart again because it seems to be what's easiest for the noobs to understand:

 

[BeatboxHero]

I used this example to explain to someone else. So I will just copy and paste my work here ........

I am sure someone went over this but hopefully my example helps. I got a 2.1 ohm dual coil iClear 30. I only have a eGo-V V2 mega VV battery to vape it with (Currently waiting to buy an SVD! So I am jealous!) So lets do some simple math....

P= Power/Watts
V= Volts
R= Resistance/Ohms

If I turn my eGo all the way up to 6 V then how many Watts am I pushing through the coils of my iClear 30? (just FYI with a dual coil you add the resistance of BOTH the coils. So I really have 4.2 Ohms all together. Also when you get your watts at the end of this equation you need to split the watts between the 2 coils.)

Equation for finding your watts is >> P = V² ÷ R
6²(V²) = 36
36 ÷ 4.2(R) = 8.5
P = 8.5
Now since its a dual coil you have to split that wattage over 2 coils!!! So...
8.5 ÷ 2 = *ROUGHLY 4.3 WATTS PER COIL*

Now the tricky part here is learning what YOU like to vape at. 4.3 watts per coil is pretty dang low according to the majority of people. 7-10 watts is the low to average for most I would say. But of course it depends on what juice I am smoking and probably a million other factors so don't be held down by that rough estimate. It is very rough. Different juices or types of clearos/carts can change what wattage you like to vape at.

Now I know what you are thinking, I only had 4.3 watts going over each coil of my iClear 30?! That is really really low! And that is exactly the point I am trying to make. My VV wouldn't even go high enough to get where I wanted it to burn! Of course I didn't realize this until after I had bought and used the iClear 30. If I had a VW like the SVD I could have cranked it up to 15 Watts and that would have devided over the 2 coils at 7.5 watts a piece and it would have been MUCH nicer. But sadly I do not have a VW device yet. So hopefully from that demonstration you understand that it is important to know what Ohms your coil is at so that you can find that 'sweet spot' that you like to vape in.

Now here is a warning! I know a LOT of people say to go with 'low resistance' or 'LR' clearos/cartos. I would be careful though because you can fry some things if you aren't careful. The way to find out if you are within a safe limit is by calculating your Amps. The equation is a lot simpler. (A = AMPS)

V (Volts) ÷ R (Resistance/Ohms) = A

So using the same equation above...

6 ÷ 4.2 = *1.4 AMPS*

Now this is considered "safe". I have been told many things on what is the safe amount of amps to push. But the general rule of thumb is that anything over 2 AMPS is technically 'not good'. I know for a fact that many people go past that limit. As long as you realize that you could burn out your coil and that it is 'potentially dangerous' if you go over that then you should be fine for the most part. The last thing you need to take into account is the "Max current output" of your mod. On the SVD it is 5.0 Amps. So if you have a set up that is pushing more then 5 amps over the coil, then it will limit you down to that 'safe' level. honestly 5 Amps is one of the higher amp limits so you have plenty of room to play with. On the other hand my little eGo-V (most eGos in fact) has a 2.5 amp limit! So if I have a 1.8 Ohm coil I can't even turn my voltage higher then 4.5 without getting limited back down by my device. (4.5(Volts) ÷ 1.8(Ohms/R) = 2.5 Amps)

So I hope this all helped. There are limitations to mods and since the SVD has a relatively wide range you do need to be careful. I personally would never want to push anywhere near 5 amps through a tiny coil. So keep that in mind. Also you will notice as time goes on that your preferences will start to make a pattern. You will learn the 'sweet spot' that you like to vape certain juices at. It makes things a lot simpler when you can calculate in your head what Ohm coil gives you the best range of options for your preferences.

 

[AttyPops]

You don't have to apologize Baditude! lol. If the squared symbol didn't bug me in that chart so much....It looks like V2 not V² Buuuuuuut....

Standard "real" eGo batteries are 3.4 volts, but some models differ. Riva and such are 3.7. And super-mini's are 3.2 So there! We're even.

 

[The Ocelot]

Hi

I'm going to be the one to start simply. What kind of battery do you have?

 

[The Ocelot]

You don't have to apologize Baditude! lol. If the squared symbol didn't bug me in that chart so much....It looks like V2 not V² Buuuuuuut....

Standard "real" eGo batteries are 3.4 volts, but some models differ. Riva and such are 3.7. And super-mini's are 3.2 So there! We're even.

Actually, a standard Joyetech eGo fires at 3.3v. Joyetech eGo 650mAh Battery

 

[Baditude]

Standard "real" eGo batteries are 3.4 volts, but some models differ. Riva and such are 3.7. And super-mini's are 3.2 So there! We're even.

At least one vet absolutely goes nuts every time I post the Safe Vaping Power Chart. Thanks for the heads up on the eGo battery voltage. I skipped that step when I went from cigalikes to a mechanical mod.

 

[Steam Turbine]

BAM!!!!

You just got schooled on vaping!

I hope you knew that you needed your masters in electrical engineering to enjoy vapin

Joke aside.... Yeah... What they said.

Basically all you need to know is that the higher the ohms... the higher the voltage you ll need to get a satisfying vape. Normal un-adjustable batteries have quite a low"ish" voltage. So 1.8 to 2.2 ohms should do the trick.

 

[Bob Lion54]

You don't have to apologize Baditude! lol. If the squared symbol didn't bug me in that chart so much....It looks like V2 not V² Buuuuuuut....

Standard "real" eGo batteries are 3.4 volts, but some models differ. Riva and such are 3.7. And super-mini's are 3.2 So there! We're even.

What bugs me about the chart is the "power level may be to low to produce a strong vapor" box. It should be "too." lol It's a good chart, otherwise, and a valuable resource.

Also, I just noticed that forum logo sitting in the tab at the top of my browser with the thread title looks like "Fohms." heh

Fohms.

 

[Coastal Cowboy]

BAM!!!!

You just got schooled on vaping!

I hope you knew that you needed your masters in electrical engineering to enjoy vapin

Joke aside.... Yeah... What they said.

Basically all you need to know is that the higher the ohms... the higher the voltage you ll need to get a satisfying vape. Normal un-adjustable batteries have quite a low"ish" voltage. So 1.8 to 2.2 ohms should do the trick.

It's not Electrical Engineering, you crazed Canadian knucklehead. It's Ohm's Law, something everyone should have learned in high school physics.

Gahh... Why do y'all have to make it so complicated?

Baditude's chart is great. However, I made one that corresponds to the voltages and resistance levels most likely encountered in the newb to intermediate range vapers' devices. My color coding is completely subjective, as I don't think a wattage approaching nine-ish is all that bad, as long as you're Ok with replacing coils more often in your Evods, Protanks, CE*'s and what not.

 

[The Ocelot]

It's not Electrical Engineering, you crazed Canadian knucklehead. It's Ohm's Law, something everyone should have learned in high school physics.

Gahh... Why do y'all have to make it so complicated?

Baditude's chart is great. However, I made one that corresponds to the voltages and resistance levels most likely encountered in the newb to intermediate range vapers' devices. My color coding is completely subjective, as I don't think a wattage approaching nine-ish is all that bad, as long as you're Ok with replacing coils more often in your Evods, Protanks, CE*'s and what not.

Except it's weird for 3.75v to have a column. All of my box mods and many (if not most) regulated generic eGos fire at 3.7v.

ETA: Oops! Sorry I missed the part where you said you made it.

 

[Pinggolfer]

Hi

I'm going to be the one to start simply. What kind of battery do you have?

I have been told by the dealer that I have a e go 1300 mAh battery which puts out 4.2 volts.

 

[Pinggolfer]

Maybe this is helpful.

Tread Size 510
MyStart eGo Battery 1300mah
Made by : Mystart eGo
Voltage 4.2 Volts..MEGA BATTERY LIFE
Choose any of the four colors below.
Black ~ Steel ~ Red ~ Steel ~ Pink
5 Clicks ON ~ 5 CLicks OFF..Fast
Charge With eGo Charger Only Mystart eGo Charger Set

 

[The Ocelot]

It's not a variable voltage? I suspect, but don't hold me to this, that you may have an unregulated battery. That means it comes off of the charger at 4.2v, and then the voltage decreases as the battery discharges. It a very common type of device. I've never heard of a regulated battery firing at 4.2v. 1.8Ω at 4.2v is 9.8w - that's pretty warm. That resistance is more appropriate for a lower voltage battery or one with VV or VW.

ETA: I looked up the MyStart eGo and it does say 4.2v (although I'm still not convinced, but I'm like that). In that case, you would want to go with the 2.5Ω head. When you start getting into high watts some juices can taste burnt.

 

[Pinggolfer]

It's not a variable voltage? I suspect, but don't hold me to this, that you may have an unregulated battery. That means it comes off of the charger at 4.2v, and then the voltage decreases as the battery discharges. It a very common type of device. I've never heard of a regulated battery firing at 4.2v. 1.8Ω at 4.2v is 9.8w - that's pretty warm. That resistance is more appropriate for a lower voltage battery or one with VV or VW.

ETA: I looked up the MyStart eGo and it does say 4.2v (although I'm still not convinced, but I'm like that). In that case, you would want to go with the 2.5Ω head. When you start getting into high watts some juices can taste burnt.

Thanks as I have had some juices taste on the burnt side. It's a standard battery and no way to adjust the voltage. I guess I may get into that more as I continue on without smoking a cigarette. Now to find a juice I really enjoy so far the best has been dark roast coffee.

 

[The Ocelot]

Thanks as I have had some juices taste on the burnt side. It's a standard battery and no way to adjust the voltage. I guess I may get into that more as I continue on without smoking a cigarette. Now to find a juice I really enjoy so far the best has been dark roast coffee.

That actually makes sense. Coffee is one of the flavors people seem to like at a higher wattage, whereas fruits are more flavorful at a lower setting. Just because your battery has a fixed voltage doesn't mean you can't change the power level. You can do that by changing the resistance of the delivery systems you put on it. I'm not going to repeat what the others have posted, but all the information is there. If 2.5Ω is too cool, get something 2.0Ω (although it may have to be another type of system); if 2.5Ω is too hot, try 3.0Ω. There's not as much wiggle room as with a VV/VW device, but the power can still be adjusted.

 

[Bob Lion54]

Except it's weird for 3.75v to have a column. All of my box mods and many (if not most) regulated generic eGos fire at 3.7v.

ETA: Oops! Sorry I missed the part where you said you made it.

Translation: "That's a terrible chart. Oh, you made it? I mean... terribly AWESOME! Yea! That's what I meant to say! " lol, sorry.

Maybe this is helpful.

Tread Size 510
MyStart eGo Battery 1300mah
Made by : Mystart eGo
Voltage 4.2 Volts..MEGA BATTERY LIFE
Choose any of the four colors below.
Black ~ Steel ~ Red ~ Steel ~ Pink
5 Clicks ON ~ 5 CLicks OFF..Fast
Charge With eGo Charger Only Mystart eGo Charger Set

I'm not familiar with MyStart, but I looked around a bit and it seems they make copies of other devices. I would guess that the battery is unregulated. A regulated battery is more expensive to make and most knockoffs don't bother. Some do, but not all. It's a guess, but without knowing the quality of MyStart... well, I tend to not give clone makers the benefit of the doubt. There's really no reason to believe it's not a decent battery, though, but if I'm going to guess if it's regulated or unregulated, I'm going to guess unregulated.

I guess I should explain regulated and unregulated batteries. Basically, a regulated battery will give off the same voltage when it's fresh off the charger to the time it runs out of power. Once it can't put out the volts it's supposed to, it "dies." An unregulated battery will give off more volts when fully charged, but will slowly drop off the volts it's giving out as the power drains until it can no longer function and will have to be recharged.

I have seen 4.2 volts as the "actual" upper end voltage for other batteries rated for 3.7 volts. This also leads me to believe your battery is unregulated and probably a 3.7 volt battery.

This isn't really a problem. You just need to be a bit careful to not burn up your coils when it's fresh off the charger. You're getting close to that happening with the 1.8Ω coils but are probably fine if you haven't had issues yet. Still, it's something to keep in mind. Make sure not to hold the button too long for a while once it's off the charger. How long is tough to say as it will depend on how much you use it, but at least a couple hours if your a heavy vaper and longer if you're not.

If you get the 2.5Ω coils you won't have to worry about that... so I guess to make it simpler, just get the 2.5Ω coils and vape away!

Hope that answers all your questions.