5ml Disposable Vapes: Empty How to Easily Tell if Your Disposable Vape Is Almost Empty Vaping360 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 Know When Your Disposable Vape Is Almost Empty How to Tell When a Disposable Vape Is Empty The Vapor Shoppe How to Quickly Check If Your Puff Vape Is Empty and When to Replace It Smart.DHgate Trusted Buying Guides for Global Shoppers