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Thread: Need help understanding ohm ratings

  1. #1
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    Default Need help understanding ohm ratings

    Hey all,

    I'm currently running an eGo battery and recently picked up several new attachments from GotVapes:
    - eGo CE4 Bottom Coil Clearo 1.3ml - 2.1-2.4ohm
    - GotVapes FLuXomizer™ 510 XL 1.8ml 2.4-2.6ohm
    - GotVapes VISION eGo Stardust 1.4ml Top Coil Carto 2.5-2.7 ohm
    - Micromizer x7 XL 1.3ml Dual LED Bottom Coil - 2.4-2.6ohm

    And I'm a bit at a loss about the the whole ohm thing. First off, what is the eGo battery rated as? Will all of the above work with my battery without any issues?

    Taking this further, the Stardust thread has people talking about a lower ohm version. Why would you want a lower ohm? Does that mean it hits harder? I ask because now I'm starting to wonder If I shouldn't be using a variable voltage battery ... but, those seem to be primarily 3.5, 3.7 and 4.2 ohm correct? So if the ohm's are higher on the battery, why are the ohm's lower on the attachments?

    I'm lost, can someone educate me on this topic?

    Thanks!

  2. #2
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    Heres a handy chart that shows how much wattage you get at certain ohms and volts.
    With a standard 3.7 volt device its recommended to get a lower ohm (ex. 1.8-2.0) attie or carto to mimic higher voltage vaping. I don't know if thats the best explanation, maybe someone else can explain it better.

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    Last edited by bseven; 02-14-2012 at 08:28 PM.

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    The battery is voltage, not ohms. The cartos are measured in ohms.

    So you have a VV eGo battery or just a regular eGo. The regular eGo is 3.3-3.4V, while the VV eGo says its 3.4, 3.7, and 4.2V, but in reality its really more like 3.2, 3.4-3.5, and 3.7-3.9.

    The higher ohm cartos give a cooler vape, while the lower ohm cartos provide a warmer vape and more TH. Most people prefer LR cartos. Standard resistance is considered about 3.0ohm, while low resistance is considered 2.0ohm and below.
    For the regular eGo I dont recommend using below 2.0ohm. People do use below 2.0ohm and dont have a problem, but many others have fried an eGo using a real low resistance carto. The real low ohm cartos put alot of stress on the eGo mosfet and can fry it, so if you do use them be careful

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    Ok that makes a little more sense ... batteries are voltage and the attachments are ohm.

    So the standard eGo is a 3.7 then? If your statement is correct about going with ~2.0ohm attachments, why are most of the attachments in the mid 2's, like the Stardust for example? With using these higher ohm attachments, am I going to destroy the battery?

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    Thanks Rob, so I should be ok with the attachments I listed in the original post using a standard eGo?

    Taking this further, what's the real benefit of using a VV ego? Is it so that the juice burns hotter; thus providing more vape?

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    No the regular eGo is 3.3-3.4V. Smoktech does make an "eGo" that is 3.7V, but the genuine eGos are only 3.3-3.4V.

    Yeah, the stuff you got should be fine. The higher ohm attys and cartos just give a cooler vape.
    I have heard of a carto that seems to kill eGos very easily, but I dont use them. I think its the Smokeymizers that can kill an eGo pretty easily, but Im not 100% sure. Hopefully someone else can confirm that or give the correct answer if Im wrong.
    The stuff you ordered should be fine. Personally I hate the fluxomizers, and any of the CE2/CE3/CE4s bc they can be very finciky and leak and can be a real PITA, but thats just me, and you might like them. I havent used a Micromizer so i cant say anything about them, and I havent used a vision stardust either, but I heard people like the stardusts.

    Personally I think the VV eGo is pointless. Its really not a real VV device, and the different voltages are very close to eachother so theres not a huge difference between them. I just dont think their worth it, but thats me. Id much rather get a PV like a Maxi RS or Silver Bullet if I wanted something like that. While its not considered a VV device, you can use different battery combinations for different voltages like 3.7V, 5V, 6V, and 7.4V. With those there will be a very noticable difference between them since their not so close together.

    Using a low resistance carto on an eGo or 3.7V device is supposed to simulate high voltage vaping. It would be kinda similar to using a 3.0ohm carto on a 5-6V device. The lower the resistance, the warmer the vape will be and the more TH there will be

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    Just to flesh out the science ... the ohm rating on the attachments is resistance, and of course the lower the resistance, the more current will flow at a given voltage ... its the high current draw using LR attachments that can cause batteries to fry, or at least run down faster, things to get hot, etc. Higher resistance attachments won't have any negative affect on the batteries or electronics, they may just not give you the performance you are after because they don't get as hot. The basic equation is V=IR (Ohms Law) where V is voltage(volts), I is current (amps), and R is resistance (ohms). Stated another way ... I=V/R, so if your batt is putting out 3.4 volts and your attachment is rated at 2 ohms lets say, your current draw will be 3.4/2 = 1.7 amps. (or 1700 milliamps).

    Soooo ... if you put more current thru a device than it was designed to handle, bad things can happen ... very bad things.
    Last edited by Slim Batz; 02-14-2012 at 10:37 PM.

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    The more power a battery sends to the coil the more juice that can be vaporized.
    power = watts
    More volts = more watts = more hit and vapor.
    Lower ohms = more watts = more hit and vapor.

    Using more watts will also drain your battery faster.

    With the same voltage you will get a lot more hit and smoke with a 2.0 ohm cartomizer than with a 3.0 ohm cartomizer. To say a battery gives good smoke and hit doesn't really mean anything. It is the combination of battery votlage and cartomizer ohms that matters.

    If you are going to use 2.0 ohm or lower you need a large battery for safety, battery life and just the ability to deliver enough current to a low ohm cartomizer.

    www.ohmslawcalculator.com/ohms_law_calculator.php.webloc

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