Not 18650 but related. Recently I've been salvaging li ions from disposable vapes. Usually they are between 2.6 and 3.3v depending on how long it's been sitting. This one was at 1v. The dark side of disposable e cigarettes Tobacco and Public Health Disposable Device Reclamation Radical Bakers Gathering You can make a difference this Earth Day! Did you know that there is no proper way to recycle or dispose of vapes? Their lithium batteries and toxic chemicals often end How to Reuse Disposable Vape Lithium Batteries : 6 Steps Instructables