6. Safety (1.)
U.S. Fire Administration has stated that the fires caused by explosions of e-cigarettes are actually rare, but in the last five years 25 incidents were reported. This includes only the incidents that were reported to the media or fire department. The explosion usually happens when the battery is charging and U.S. Fire Administration warn people to charge the batteries carefully and not to use power sources which are not approved by the manufacturer! Unfortunately, there are no regulations of e-cigarettes safety and people think that FDA (US Food and Drug Administration) should regulate e-cigarettes. FDA regulated only electronic cigarettes marketed as therapeutic.