Rechargeable vapes use lithiumion batteries, which can react badly to sudden changes in temperature. To help prevent your vape from becoming a fire risk, keep these tips in mind: Keep your vape Vapes use lithium ion batteries, and leaving them plugged in once fully charged can be a fire hazard. You shouldn't leave vapes charging unattended, or while you're asleep or for that matter An engineer went viral after salvaging lithium ion batteries from roughly 500 discarded disposable vapes and using them to power his home. What looked like everyday trash turned into a functional energy storage Turning Disposable Vapes into a Fast Charge Power Bank Unsafe disposal of millions of vapes a week causing environmental damage and rise in lithium ion battery fires British Safety Council