Two major airlines have revealed strict rules for hand luggage.
Vietnam Airlines and Vietjet Air will prohibit the use of power banks onboard, joining several other airlines , such as Emirates, with restrictions.
The ban will stop passengers from using their power banks onboard and from charging them using the at-seat ports, reports Express.co.uk.
While the banks can still be taken into the cabin , they are not allowed to be used and must be kept in clear sight.
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This ban has been introduced while fears are mounting over the safety of lithium batteries while in the air.
Last week, the US Federal Aviation