New guidelines for the use and storage of power banks inside aircraft have been established by the International Civil Aviation Organization “to safeguard international aviation.”

The organization says that new rules were created to take into account fresh information about the dangers that passengers’ lithium batteries posed while they were inside the aircraft. The goal of the new ICAO directive is to “enhance safety and peace of mind for passengers and airlines alike.”

“These improvements reflect ICAO’s continuing commitment to enhancing aviation safety, in line with the organization’s strategic vision of air transport for all by 2050, with zero fatalities and net zero carbon emissions,” it stated in a statement.

Passengers aboard airlines are only permitted to bring a maximum of two power banks per person. During flights, passengers are not permitted to use the power banks to recharge them or to use them to charge their personal devices. However, as long as they follow the aircraft’s operational guidelines, crew members are permitted to carry and utilize power banks on board.

Lithium batteries, which power mobile devices like power banks, can catch fire if they are broken or if there is a short circuit in the battery terminals, according to the Federal Aviation Administration. For this reason, power banks are not permitted in checked baggage on airplanes.

Despite the ICAO’s announcement that the regulations went into effect on March 27, airlines are free to decide when to implement the limits in their particular aircraft.

On April 6, Sinagpore Airlines declared that it would put the revised ICAO guidelines in effect by April 15.

SIA restated additional regulations pertaining to power banks. No previous authorization is needed for devices up to 100Wh. Before passengers can bring them on board, those between 100 and 160 Wh will need to be approved. Power banks larger than 160Wh are prohibited inside aircraft by SIA.

Furthermore, SIA declared that power banks are not permitted in check-in luggage and must be stored in cabin baggage. Power banks should not be kept in the overhead compartments; instead, they should be easily accessible within the cabin.

Hong Kong International Airport has started putting the new ICAO regulations into effect, according to the South China Morning Post.

“Effective immediately, all passengers departing from Hong Kong International Airport are required to observe the requirements,” the airport stated in a statement.

China Airlines and EVA Airways are among the airlines that promptly adopted the new ICAO regulations.