E-cigarettes or cigarettes, which is more harmful?

Electronic cigarettes are very harmful. Most e-cigarettes use lithium-ion and secondary battery power components. The battery life depends on the type and size of the battery, the number of uses and the operating environment. And you can choose many different types of battery chargers, such as socket direct charging, car charging, USB interface charger and so on. Battery is the biggest component of e-cigarette. Some electronic cigarettes use electronic airflow sensors to start heating elements, which will make the battery circuit work once inhaled. Manual operation requires the user to press the button and then smoke. Pneumatic is easy to use, manual loop is relatively stable, and smoke is better than pneumatic.