An electronic cigarette, including an atomizing assembly, a battery assembly, and a box assembly. The atomizing assembly is disposed on the battery assembly. The atomizing assembly includes an e-liquid storage unit and an atomization unit. The atomizing assembly and the battery assembly are disposed in the box assembly. The e-liquid storage unit includes a mouthpiece, a seal ring adapted to seal the mouthpiece, a decorative thread ring, a seal plug, an e-liquid tank, and a tank cover. The atomization unit includes an O-ring, a limit cover, an e-liquid conductive cotton, a heating wire, an insulation ring, and a joint. The battery assembly includes a seal, a support, a first battery cell, a base plate, a first magnet, a cartridge, and a battery cover. The box assembly includes an outer sliding cover, a first screw, an inner sliding cover, a second magnet, a fixed part, a flexible circuit board.
