Two more airlines have added themselves to an expanding roster of carriers banning the use of one widely-used device that millions of travellers depend upon during flights.

Vietnam Airlines and Vietjet Air have both now introduced restrictions preventing passengers from utilising power banks to charge their electronic gadgets while in the cabin. This mirrors similar moves by several other airlines throughout the year, many of which serve routes to and from the UK.

The fresh rules stem from escalating concerns about lithium battery safety aboard aircraft. Only last week, the US Federal Aviation Authority (FAA) issued a revised warning after 50 incidents involving power banks on planes.

They stated: "Lithium batteries stored in passenger overhead bins and or in carry-on baggage may be obs

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