Is Your Disposable Vape Empty? Here's How To Tell How Do You Know When Your Vape Is Empty? Disposable vape, just three components but what it bugs me how does it know when it's empty. Led flashes when no juice is left but how? What makes led flash? How To Tell If A Vape Is Empty Or Full How Do You Know When Your Disposable Vape Is Empty Australia How To Tell If Disposable Vape Is Empty