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 Off Stamp SW Battery Buy Disposable Vape With Detachable Battery & Replaceable Pods Vapesourcing LOST VAPE KATA Lost Vape Vape With Detachable Battery: What It Is and How It Works Bought a vape with replaceable tank and separate battery thinking I was reducing battery waste Tank ALSO has a battery in it. (I can only get disposables where I live) : r mildlyinfuriating