Last month the United States Federal Aviation Administration (FAA) issued a Safety Alert For Operators (SAFO) advising airlines about potential fire risks from e-cigarettes which use lithium batteries to heat nicotine in to a vapour inhaled by users. The SAFO issued after two instances of fire caused by e-cigarettes, called for banning of these popular devices from checked-in baggage.
Though voluntary, most airlines follow the SAFO, and Malaysia Airlines has announced that all its passengers will be required to carry electronic cigarettes in their carry-on baggage only. Many airlines including Malaysia Airlines, ban the use of e-cigarettes on board flights and this will continue. The FAA will be taking a final decision on whether to ban e-cigarettes all together by the end of April.
The International Civil Aviation Organisation, the United Nations of aviation, too issued a warning in December 2014, and its dangerous goods panel is considering potential action which may include a complete ban.