Powerbanks are banned on planes by two Vietnamese airlines. — Photo vietnamnet.vn

HÀ NỘI — Two most popular carriers in Việt Nam, the national carrier Vietnam Airlines and the budget carrier Vietjet Air, have both officially banned passengers from using lithium-based power banks during flight.

The ban was issued after an incident on March 21, when a Hong Kong Airlines flight from Hangzhou (China) was forced to make an emergency landing when a power bank in a passenger's personal bag suddenly exploded and caught on fire.

This is not the first time a flight has had to make an emergency landing due to an exploding power bank. On February 19 last year, a Royal Air Philippines flight also had to make an emergency landing after a power bank exploded, filling the plane with smoke.

Many airlines around the world such as Thai Airways International (Thailand), Air Asia (Malaysia) and Air Busan (Korea) have banned the use of power banks on flights to reduce fire and explosion risk.

In Việt Nam, on Monday, both Vietnam Airlines and Vietjet Air announced that passengers are not allowed to use backup power banks on the plane unless they are removed from their carry-on luggage, placed in an easily visible place and not used to charge mobile devices during the flight. Power banks previously are already not allowed to be left in checked baggages.

Passengers are also not allowed to charge their power banks from USB ports on the plane.

Power banks must be protected separately and completely turned off to avoid activation.

Each passenger is allowed to carry 10 batteries with a capacity of no more than 100Wh.

For a common power bank with a voltage of about 5V, the corresponding capacity will be about 20,000 mAh. For power banks with a capacity of 100-160Wh, passengers are allowed to carry a maximum of two devices.

Regarding spare batteries, previously airlines only regulated not to put them in checked baggage due to concerns about fire and explosion. — VNS