Battery/Cartomizer Compatibility for 21st Century

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westwingr

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Apr 4, 2011
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I am trying to figure out exactly what model battery I have so I can purchase cartomizers for it. It is a 21st Century brand ecig. The only marking anywhere on the battery is a "K". I have a 510, in which the threads are slightly smaller in diameter than the 21st Century and a 4081, in which the threads are slightly larger. Does anyone know if there is an ecig that matches up to this? One that falls in between the 510 and 4081?
 

dormouse

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Oct 31, 2010
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Just by looking at a photo there is no way for people to tell the difference between the popular KR808D-1 and the incompatible rebrander model KR808D-2. LeCig carries adapters D1 battery to D2 carto and vice versa

And if what you have is a FEMALE battery, then it is neither KR808D-1 nor KR808D-2 because they are male batteries. In that case, if it has a diameter of at least 9mm then it may be RN4081 but could also be an incompatible clone of RN4081. And there are some other possible things, some compatible with 510 attachments (but not necessary charger could fry it) and some not compatible w/ 510 nor RN4081.

1. Is it a male or female battery?

2. Is it a 2-piece or 3-piece ecig? (KR808 models have no atomizer, RN4081 is 3 or 2 piece)

3. Is it definitely skinnier than 9mm - if so then it is none of the above
 
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westwingr

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Apr 4, 2011
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The battery is female. The ecig is two piece. It is approximately 9-10mm.


4081largerthan21st.jpg


The diameter on the 4081 cartomizer threads (on the left) is larger than my unknown battery.


510smallerthan21st.jpg


The diameter on the 501 cartomizer threads (on the left) is slightly smaller than my unknown battery.


And as you can see the threads on the carts themselves are wider, not as tight as the 4081 or the 510.

21stthreads.jpg
 
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westwingr

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Apr 4, 2011
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Wow. That's weird. The one I have is the only one they sell around here from that particular distributor. I wrote to the distributor and asked about the specs on the battery but didn't get an answer.
Thing is, I have five of these batteries now. When I bought my first one my daughter and my son were so happy about me quitting smoking they both (unknowingly) went out and bought me a starter kit of the same brand.
I know there has to be something comparable out there. Most of this type of ecig is a knock off of a well known kind. And I hate to just get rid of the batteries or keep paying $15 for 3 carts. I can buy carts for my other ecigs for $8 for 5.
I did try using atomizers and cartridges but it's like sucking on a straw. I like the drag I get from the cartomizer.
 
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