Will I get a 'contact high' just walking down the street? Macleans.ca Unplug your vape when it's fully charged to reduce the risk of fire. Rechargeable vapes contain batteries which can overheat when left charging for too long and that means fire risk. While vaping is not risk free, it is less harmful than tobacco Our World in Data E cigarettes and Vaping Commercial Tobacco Use MN Dept. of Health