Cartomizers are an alternate way to use your electronic cigarette. They essentially turn your e-cigarette into a two piece unit, by relpacing the cartridge an the atomizer with a single cartomizer. Instead of filling your cartridge, you fill the cartomizer, which has a heating coil (just like an atomizer) and poly filler (just like a cartridge) buit in. They work with all 510, EGO, and T-Rex batteries.
Cartomizers are disposable, and generally can be refilled several times before they wear out. They do not last nearly as long as atomizers.
HOW TO FILL CE2 CARTOMIZERS