AirAsia power bank rules: up to 2, 100Wh, no use on board

In checked bags

Not allowed in checked baggage

Not allowed

Over 100Wh: not allowed

How many

Maximum 2 power banks per guest, up to 100Wh each

Using it on board

Using or charging a power bank onboard is strictly prohibited at all times

Where to keep it

Not in the overhead compartment; must be in the seat pocket or under the seat

Packing

Terminals must be protected against short circuits (original packaging or taping over terminals)

No. Using or charging a power bank onboard is strictly prohibited at all times.

In the airline's own words

• Power bank rules, airline by airline
• Power banks on Japanese flights