SSMOK V9 Max vape pen is a bigger and improved version of the massively popular V8 series which is one of vaping.com’s best selling starter kits. It features an integrated 4000mAh battery, 1000mAh more than its predecessor so that you don’t have to worry about your charge levels. The power levels are indicated clearly on the LED indicator contained with the Power Button. All you have to do is press the power button twice within a second and it will display one of three colors. Green light means that you have over 70% battery remaining, orange 30% to 70% and red means there is only 30% charge left. It also flashes 15 times when the voltage drops below 3.3v.!