Hello, all! I just bought a Mercenary Vaporizer, a pen-shaped portable one, and the instructions say to plug it into the charger and wait for the light to turn a bright red and that when it turns a dark red it will be ready to use. However, the LED isn't changing to another color other than green, although the little blue light at the front of the vape has turned off. Does that mean that it's charging? Thanks for your help!!