A 18650 battery is a popular game player in many industries, and thus it’s easy to find and very affordable. Its measurements? You’ve guessed it! 18mm thick, with a 65mm height. These batteries can hold huge energy in a small space and have a long life expectancy of around 500 charges, being the most popular e-cig mod batteries today. This also explains the extensive number of fakes out there, but rest assured, the 18650 Batteries available at NextDayVapes are all sourced from trusted and reputable manufacturers.