Long term, it almost tien day battery. Convenient for me that always have to mouth I smoked two to three days per pack of cigarettes, I do not smoke more than a maximum of 5, hoping to reach 0. The tip of the flat nose is more practical than conventional cigarettes. The tank is also more convenient. Only downside, like other cigarettes of heavy use, the liquid escapes at the switch button, one has full fingers. This is not pleasant