The Exxus Slim VV Vape Pen Battery is a single device that delivers smooth performance and balanced power.  The 510 thread attachment port of this vape pen battery makes it a simple fitting solution for a wide range of tanks.  Because the Exxus Slim VV is a variable voltage device, the output voltage may be adjusted between 2.6V and 4V.  This item is ideal for making quick, pleasant sessions due to its 10 second heat up time.