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 Up in smoke: Considerations for lithium ion batteries in disposable e cigarettes ScienceDirect Vape Batteries: Care and Recycling Explained Don't let your vape go out with a bang! Vapes contain lithium batteries. If they're thrown in the bin, they can cause fires, leak hazardous chemicals, or create toxic waste. Even disposable Do Disposable Vapes Have Lithium Batteries BOOST!