Stiiizy Biiig is the second version of the Stiiizy vaporizer featuring a larger battery capacity and performing much better than the original version. Stiiizy Biiig is a little larger than the first version though nicely fits in the palm, it also has improved magnetic connection and the airflow. Stiiizy Biiig has an upgraded 550mAh battery that produces 3.4V and can be charged via micro-USB port. The battery sold without the cartridge.
Everything is perfect. I would recommend!