There are 3 different types of electronic cigarettes kits; 1 Piece Electronic Cigarette Kit, 2 Piece Electronic Cigarette Kit and 3 Piece Electronic Cigarette Kit.
The 1 piece electronic cigarette kit type is the most widely used by most smokers because of the convenience and economic efficiency. It is the best option for starters who do not what type of electronic cigarettes kit to begin with.
They come with non-refillable nicotine cartridges and pre-charged battery. They are meant for one-time use and are disposable as soon as the e-liquid runs out. Disposable electronic cigarettes are intended to maximize portability and mimic real electronic cigarettes. As such, they come as mini style electronic cigarettes.
The 2 piece electronic cigarettes consist of a replaceable cartridge and a rechargeable battery. The cartridge has a built-in nicotine optimizer. 2 piece electronic cigarettes are also very potable and convenient curry. One good aspect of the 2 piece electronic cigarettes is that they are flexible and users can easily switch between different flavors. Also, each time a cartridge if replaced, the optimizer gets replaced as well. The atomizers and the batteries are partially-consumable and need to be replaced every five to ten weeks.2 piece electronic cigarettes frequently have bad cartridge that refuses to work and refilling the cartridge is very hard.
3 piece electronic cigarette kits comprise separate nicotine cartridge, battery and atomizer. These can be easily screwed and unscrewed. The cartridges are easy to refill and use and never get bad unless used up. The drawbacks of 3 piece electronic are that it is difficult to switch between flavors unless with a spare atomizers. 3 piece electronic cigarette atomizers wear out faster resulting in to increased costs.
Generally the cost factor increases with the number of pieces.3 piece are the most expensive to purchase and maintain while 1 piece is the least expensive.