THERE ARE TWO TYPES OF ATOMIZERS AND CARTRIDGES FOR THE EGO.
THIS IS THE CONE (TYPE A). THE CONE ATOMIZER AND THE CARTRIDGE (TYPE A) HOLDS 1.5 ML OF E-LIQUID.

THE CYLINDER ATOMIZER (TYPE B) ALSO WORKS WITH THE EGO.THE CYLINDER ATOMIZER AND THE CARTRIDGE (TYPE B) HOLDS 2.5 ML OF E-LIQUID.

This means you can go almost a whole day without having to put liquid into the electronic cigarette.