If the voltage of the battery is inconsistent, the heating element fires at a cold temp and then increases to a hot temperature and the vapor will also be inconsistent. Not usually a problem, unless your e-liquid only tastes good at one temperature.

Unfortunately, the Surgeon General's report conflated these two types of changes and as a result, its conclusion that the introduction of the filter actually increased cancer risk is inaccurate and in conflict with the scientific evidence.

In other words, this is a special exemption put in place for what are clearly political, rather than public health purposes.

Since electronic cigarettes represent a huge threat to cigarette sales - as many smokers are switching to electronic cigarettes completely or reducing their cigarette consumption substantially and substituting vaping - this massive tax on electronic cigarettes would serve to protect cigarettes from competition, thus protecting Big Tobacco profits at the expense of the protection of the public's health.

One thing both opponents and proponents of e-cigarettes agree on is the need for more research. As electronic devices become more prevalent and users have prolonged exposure to vapor cigarettes scientists and health organizations can study the effects and present more clear positions on e-cigarette use. For now, e-cigs are quite obviously a safer method for nicotine delivery than the inhalation of smoke.

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