Power banks on board: charging, use and where to keep them

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The short answer

Do not charge power banks on board
Charging them from the aircraft's power supply is prohibited (from April 24, 2026)
Do not charge devices from a power bank
MLIT asks passengers to charge phones etc. using the onboard power outlets
Keep them close, not in overhead bins
e.g. the seat pocket. Protect each one against short circuits (tape, case or bag)
Not in checked baggage
Always carry them on board. Violations may be subject to penalties under aviation law

For how many and how many Wh you can take, see New power bank rules and How to read power bank capacity.

1. What you must not do on board (from April 24, 2026)

Sources (2)

Source: Japan Ministry of Land, Infrastructure, Transport and Tourism (MLIT): new rules for carrying power banks on board (announced April 14, 2026; applied from April 24, 2026) [in Japanese] (retrieved 2026-09-27)

Source: MLIT: "To All Passengers: Regarding Bringing Power Banks on Board" (English version) (retrieved 2026-09-27)

2. Where to keep them and how to prevent short circuits

Source

Source: MLIT: "To All Passengers: Regarding Bringing Power Banks on Board" (English version) (retrieved 2026-09-27)

3. If you break the rules or cannot take a power bank on board

Source

Source: MLIT: "To All Passengers: Regarding Bringing Power Banks on Board" (English version) (retrieved 2026-09-27)

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