The Yocan B-Smart Battery is a small and compact 510-threaded vaporizer battery that accommodates a wide variety of 510-threaded attachments allowing you to enjoy a wide array of cartridges and atomizers that will suit your style and needs. It's a compact companion you can take almost wherever you may go. However, size isn't its actual strength. The real gem in this battery is its variable voltage settings. You can enjoy temperature profiles from 2.0 volts to 4.0 volts. While pens its size only sport pre-set variable voltage levels, the Yocan B-Smart Battery allows you to find your sweet spot with precision.