Disposable Vape Pens, The Next E Waste Nightmare The Handbuilt City 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 Do Vapes Have Lithium Batteries? Vapor Shop Direct 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