Hi Suki, I am a believer in e-cigarettes. I have used them now for over two years.
Many, many years of nicotine addiction, and I have quit before, but only for a few months. It's the hand to mouth thing.

I went through the smaller units and they satisfied for awhile. I belong to ECF, which is Electronic Cigarette Forum. They have many listings there as to the e-cigs. and juices and parts. I do have some COPD and my lung Dr. is very content with my switching.

I use the puresmoker V 3 and it takes two batteries..heavy metal and much larger than the smaller e-cigs....which wear out waaaay fast. I have likely gone though a dozen or more brands and can be costly deciding what to use. Now, I feel I have reached a plateau with what I am using and very content with it and my halo ejuice. I'm all for it, beats those 3000 or so added ingredients to a regular cig.
bj