LG HG2 Battery 3000 mah 35A is 18650 flat top battery. These batteries are 18mm in length and designed to easily fit in 18650 box mods and 22-23mm tube mods. The nominal voltage of these batteries is 3.6v and full charged voltage is 4.2v. These batteries have a capacity of 3000mah and can handle maximum 35A load.