The present application provides a battery assembly of an electronic cigarette which is adapted to form an electronic cigarette in combination with an atomizing assembly. An image identification device includes an image sensor and a microprocessor. The microprocessor matches an identifier to be identified collected by the image sensor with a preset identifier, and if the identifier to be identified matches with the preset identifier, the microprocessor controls a circuit between the battery assembly and the atomizing assembly to turn on, thus the electronic cigarette can work normally. That is, the electronic cigarette has an identification function that it can be normally used only when the battery assembly and the atomizing assembly of the electronic cigarette are matched, thereby avoiding damage to the connectors of the electronic cigarette caused by mismatching. In addition, the present application may further avoid the user having a poor experience due to use of the conventional battery assembly and atomizing assembly in any combination, mixed use of tobacco tars having different flavors, and mixed use of the battery assembly and the atomizing assembly from different manufacturers. Thus, the present application may facilitate the recognition of the user of the manufactures and brands, and is more beneficial for the user to quit smoking.