1* Vision Spinner I Variable Voltage Battery 1300mah
1. Short Circuit Protection
2. Safety Cutoff/Atomizer Protection
3. Low Voltage Protection
4. 5 click on/off button
The Vision Spinner I uses smart buck-boost converter technology, which allows you to adjust voltage output from 3.3v ~ 4.8v by spinning the knurled dial at the bottom.This And it has a 1300mah capacity and a meduim size that would cause little problem in carring it.