Present disclosure relates to a volume adjustable E-liquid storage tank, electronic cigarettes having the volume adjustable E-liquid storage tank, and methods of using the electronic cigarettes having the volume adjustable E-liquid storage tank. In certain embodiments, the E-liquid storage tank includes: an E-liquid refill base, an E-liquid storage tank internal wall, an E-liquid storage tank external wall, a vaporizer assembly mounting base, and a volume adjustment ring. The E-liquid storage tank is sealed by a first mouthpiece sealing ring on the top, and a vaporizer sealing ring at the bottom. The volume adjustment ring is installed inside the E-liquid storage tank between the E-liquid storage tank internal wall and the E-liquid storage tank external wall to reduce the amount of E-liquid filled in the E-liquid storage tank. The thickness and the height of the volume adjustment ring may vary to adjust the amount of E-liquid in the E-liquid storage tank.