I am seeing a lot of talk about tanks and what can and can't be used on the V2 batteries and I thought I would do a quick explanation here. The numbers such as 808 - 510 - and so on do not describe the battery at all, they describe the connection on top of the battery that the cartridge/catomizer/tank/atomizer screws onto. You can make a mod the size of a beer keg and use an 808 connector or have a unit the size of a AAA battery with a 510 connector.
My mini 510 mod witha 5ml tank...

All V2 batteries are KR808 D-1. There is an 808 DM whose cartridges will work but they are larger diameter and look rather odd on the V2 battery. And while there are larger 808 (3 to 6 ml) tanks they do not work well with the V2 battey in most cases unless you are sure to use a low resistance single coil cartomizer in it.
There are 510 batteries the same size as the V2 but the cartridges will not interchange.
901 batteries are generally the same size as the V2 808 batteries and the 901 cartridges, tanks, and atomizers will work on the 808 V2 battery but the V2 cartridges will not work on a 901 battery, that is due to the location of the air flow holes.
306 is a bare atomizer system used strictly for dripping on a 510 connector.
You will want to avoid any dual coil cartomizer with the V2 batteries, they simply do not have the mAh capacity to run these high drain cartomizers for very long. (yes I found out the hard way...lol)
There some mini tanks in 808 and 901 that work very well with the V2 batteries, as a general rule these are going to be about the same size as the V2 cartridges. Tanks like the I Turbo and Stardust are made to be used with larger batteries like the eGo and vGo.
I own examples of everything I talked about and have tried many combination...some work, a lot don't. I learned by trial and error in many cases and hope to keep others from wasting vaping dollars.
I realize there will be questions and comments and I as well as others will be happy to answer them...
Comments
Atomizer...this is the actual heating unit, a drip tip fits over it and is a friction fit and that is all that seals it. This one is a 510 connector and doesn't come with a shell or body at all. A 901atomizer looks more like a regular cartridge but doesn't contain any batting. You can actually very carefully remove the batting from a V2 cartridge and turn it into an atomizer of sorts. I use to do this for taste testing.
here is anatomizer and you can see how the drip tip fits over rather than into it...
Cartomizer...this is an atomizer with a juice delivery system added to it. This can be a tank, a clearomizer, or a cartrdge with batting.
Got myself messed up. Love my V2 batteries. Someone suggested I buy a 901T kit. WHAT???? All I wanted was a longer battery life and a cart that would last awhile. Using V2 batterys and 808 carts, refilling now. I want longer life, sexy look and my juice. I want something that will last all day at the house.
I really like my V2s and use them daily...but I do have larger units as well.
I also have eGo-T with B tanks & eGo-C with A tanks. I tried CE2's and hate them as well as Clearomizers.
My point is why try to put a large tank on a small battery (like an 808) that will run out of power long before you run out of juice?
Abs, great thread and so informative, thanks for starting it!
Mileage may vary.
@rule62..thats about right..My 650ma last 6-7hrs..havent run the 1000 fully dead yet
:)Check out this wood vaneer covering for e-cig batteries
probably wouldn't work to well...at best you would have a sorta kinda atomizer that may or may not work. There isn't really any way to turn it into a tank without a bunch of engineering. Without knowing what kind of 510 unit you have it is hard to make recommendations but if it is a stick battery like the V2 I would just order some 510 Kangers for it. If it is a bigger battery like a eGo I would go with the Stardust/E-Turbo cartomizer.
1. they are almost double the diameter of a V2 battery
2. many sights that sell the advise against using them on low mAh batteries like the stick batteries
3. I have read varied results about them working on stick batteries
Will they work?...probably
Will they work well?...probably not
I learned a lot through trial and error...sadly knowledge gained that way isn't free.
The best analogy I can come up with is --
Trying to turn a Dum Dum pop into an All-Day sucker without changing the size of the stick.
I'm considering buying some
KR808D1 Ultimate CE2 Clearomizers and was wondering of you have tried them and what resistance I would need.
The biggest problem that has occurred is when people stack batteries that have an unequal charge, The mostly dead battery tries to pull juice from the good battery at the same time you are putting a load on it. This cause the good battery to discharge very rapidly causing it to overheat. This happens in flashlights like the Surefire using CR123 batteries as well as in mods when people are trying to hit 6 volts by stacking batteries.