Here is how the BIONIC e-cigarette works:
The e-cig has 3 parts. #1) The Cartridge #2) The Atomizer #3) The Battery
#1) The Cartridge: Nicotine is only one of the liquids in the cartridge. The other is glycerine. Chemically, liquid nicotine will not burn at the level the e-cig battery operates at. It's simply just not enough heat. So, the way to overcome this obstacle is to cut the nicotine with glycerine. It's much like cutting Coca-Cola syrup with soda water. If you aren't afraid of the nicotine, don't be afraid of the glycerin. It is FDA approved and in many appetite suppressants. The nicotine combined with the glycerin allows the mixture to burn and produce vapor, which is what you see when you exhale.
#2) The atomizer: I think the best way to describe the atomizer is to compare it to a carburetor. When you push the cartridge on the e-cig, it is forced onto the atomizer. The bigger the atomizer, the more nicotine you receive. Size counts here. The flow and amount of nicotine you receive is directly related to the size of the atomizer you are drawing from. The smaller the atomizer, the less vapor you are able to draw out of the e-cig.
#3) Not much to say here. It's a standard lithium battery. I'm glad it's lithium versus some crap builder's grade battery.
Hope this helps