the nicotine in cigarettes is a known How much vapes & (mg vs %) Cigarette - Wikipedia

At first I thought it must date from 1937 and that Great Grandmother had kept it

In contrast, 70 other types of bacteria, some of which are important for the decomposition of toxins, were significantly less common

In addition, while long-term health effects of vapes need to be studied further, the double exposure to large amounts of nicotine and toxicants from both conventional cigarettes and vapes are a great concern for public health. Future Research Directions The researchers say that because they were combining several studies, each with a slightly different approach, it was not possible to categorize different types of dual use, such as people who mostly smoke but occasionally vape

Its also best practice to charge on a hard surface so it cant overheat as well and, if you notice any warping on your batteries, dont use them