The restriction of these power sources during air transport stems primarily from their inherent flammability and potential to cause fires. Lithium-ion and lithium metal cells contain a highly reactive metal that, under certain conditions, can undergo thermal runaway, a process that generates intense heat and can lead to explosions and rapidly spreading fires. These incidents pose a significant threat to aircraft safety.
This safety concern is amplified in the confined environment of an aircraft cargo hold or passenger cabin. A fire involving these cells can be difficult to extinguish, as the chemical reaction generates its own oxygen, rendering conventional fire suppression systems less effective. Historically, there have been documented instances of fires originating from these items during flights, resulting in emergency landings, significant property damage, and raising serious safety concerns within the aviation industry.
