Did you know Lithium ion batteries, commonly used in vapes, can catch fire if they're damaged, improperly disposed of, or left charging long enough to overheat. Vaping is often seen as Up in smoke: Considerations for lithium ion batteries in disposable e cigarettes ScienceDirect I've been salvaging these disposable vapes for the 3.7v 500mAh lithium batteries inside. They can be used to power small electronic projects with the appropriate charging circuit and voltage converter. : r diyelectronics Vape Waste 2 Do Disposable Vapes Have Lithium Batteries? The Inside Story Crystal Vape & Crystal Bar & SKE Vape Official Station How to Safely Dispose of E Cigarettes: Information for Schools and Small Businesses US EPA