Electronic cigarettes with 21700 battery

21700

— powered by replaceable 21700 batteries. Most often, there is only one such battery, models with two batteries are extremely rare.

For general features of replaceable batteries, see Battery section. And the 21700 size provides a battery diameter of 21 mm and a length of 70 mm — that is, the batteries are slightly thicker and somewhat longer than the popular 18650 cells. At the same time, 21700 batteries do not have key advantages over the latter, and therefore they are used extremely rarely.