The Best Vape Batteries for Long Lasting Power Rokin Pillar Digital 510 Cart Battery VPM.com Phones, vapes, laptops, e scooters and other devices containing Li ion ( lithium ion) batteries can cause fires if not properly used, charged or maintained. Don't leave Li ion devices charging overnight. Don't let Li ion devices get 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.