How to set the battery color
Turn it On: It''s very simple to change the voltage settings on a O.pen vape battery. The stylus design makes the O.pen discreet and the soft bottom acts as a power button that turns the vape pen battery on by clicking it 5 times.Once the vape pen is on, which will be indicated with dots lighting up around the bottom of the pen, click the button 2 times to change …