Vape ASIC 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? Inside almost every disposable vape is a fully functional 3.7V lithium ion cell the same chemistry powering your phone. This dev is harvesting them for power banks instead of landfills, and wants Crafted for Taste: Inside the Myle Pod Box 35K Flavor Collection Apvs