Most popular starter ecigs - research these
Joye 510 (3-piece, can be 2-piece w/ blank cartos, 180mah batteries but the mega xl batteries are 280mah)
KR808D-1 aka Vapor4Life for colors, prefilled cartos (2-piece, standard battery is 280mah, 180mah and 380mah batteries available but the 380mah don't fit in the PCC)
I recommend MANUAL batteries - more sealed against death-by-
juice-leak, can't turn on accidentally from wind or vibration, and I think less work. A light to moderate vapor may get 2-3 hours out of a 180mah battery, a heavy vaper will get 1/2 that. A light to moderate vaper may get 3-4 hours out of a 280mah battery, a heavy vaper will get 1/2 that.
If you want super-long battery life and ability to use hotter harder-hitting low resistance parts, skip right to Ego and Riva 510 which have sturdier 650mah+ batteries.
Note - these two lines have the most adapters, the most blank cartomizer styles, the most fat battery models. They are the two most supported lines by normal-price multi-brand vendors and for new equipment threading. Re prefilled cartos (cartomizers of a 2-piece) - prefilled is just a small convenience. You will be adding
eliquid to carts or cartomizers regardless. With adapters 510 and KR8 can use each other's stuff as well as atomizers of other models.
2-piece is battery + cartomizer
3-piece is battery + atomizer + cartridge aka cart
cartomizer is a combined disposable atomizer and cart - fill one well and keep it damp and you can get 4-7 days use out of one of more. Some are successful cleaning them for reuse, some are not. They cost about $2 apiece. A cartomizer holds more juice than a cart (typically 2x or more) and you can vape a cartomizer longer without needing to add juice.
cartridge is just stuffing and plastic - can be reused a long time until it gets loose from heat or use. You can replace the stuffing (blue foam is a popular replacement). You can wash the cart, rinse the stuffing, dry it all and keep using. The part that needs care is the atomizer - they can burn out or may get gunked up and need cleaning. Always good to have several atomizers if you are using a 3-piece. Main downside - carts need to be topped of with juice a LOT more often than a cartomizer and they are also more likely to dump their juice and give you a mouthful.
Whatever you get, I think it's good to have both cartos and atomizer+cart. (the KR8 model can use a DSE901 atty with no adapter needed or a 510 atty w/ an adapter). You can use a cart on the atty or drip using a drip tip (not recommended for auto batteries).
