I have found so much excellent information on this board so thank you for that, before I say anything else. 
I have been vaping for a week now, and was using a standard 'ego' style battery which I bought on the internet (I have two of them so I'd have one on charge while using the other). They were fine to begin with but when I started vaping more frequently, I found the batteries were losing charge very quickly.
So I went to my local vape shop today to ask for a better battery and came away with an evod twist II, which I'm happy with. The shop owner talked about the variable voltage and explained that, if I want to be able to use the higher voltages, I'd need a dual coil....thingy...atomizer? Tank? Whatever the feck it's called!
So I need help finding the right sort of thing that will fit the evod and work well with it.
If anyone knows what I'm talking about (I don't), please give me your words of wisdom!