Why airlines restrict power banks
An incident involving a portable power bank battery catching fire aboard a Lufthansa aircraft has renewed concerns about the risks posed by these devices. Lithium batteries can become damaged or overcharged under certain conditions, leading to a "thermal runaway" that causes overheating, smoke, or fires. The number of thermal runaway incidents increased by 15% over the past year, with power banks being the primary source of such incidents. It is recommended to carry them inside the passenger cabin and follow safety procedures, with a maximum allowed capacity of 100 watt-hours. Current safety regulations specify that power banks must be kept in carry-on luggage, and batteries should be removed from checked baggage upon boarding to prevent fire risks during the flight.
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