list four dangerous chemicals in cigarette smoke Compound Interest: The & Their Effects Chemicals in Cigarettes and Tobacco:

If youve purchased batteries from one source and chargers from another there may be a compatibility problem, ie a slight difference in the size of the battery thread and the tank device or, and this is much more serious, the charger may not be intended to charge your particular e-cig battery and there may be voltage issues and therefore a serious safety risk

[DOI] [PMC free article] [PubMed] [Google Scholar] 34.Wang H, Chen L, Zhou T, Zhang Z, Zeng C

The existence of toxic heavy metals in cigarette tobacco may thus introduce noticeable non-carcinogenic and carcinogenic health impacts accompanying inhalation exposure

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