Colorful 18650 Lithium Ion Battery cell on a wooden table known for use with vape or e cigarette. Also used to make laptop battery and power bank. Wit Stock Photo Alamy Stop Smoking E Cigarettes CardioSmart American College of Cardiology About E Cigarettes (Vapes) Smoking and Tobacco Use CDC Have you been thinking about trying vapes or e cigarettes? Think again! Most e cigarettes contain nicotine and other harmful substances. Some products claiming to be nicotine free have been found to contain nicotine. Nicotine FDA hazy on e cigarettes' safety CNN.com E Cigarettes and Lung Health American Lung Association