Jin Air power bank rules: up to 2, 160Wh, no use on board

With approval

Over 100Wh and up to 160Wh requires airline approval at check-in counter

Not allowed

Over 160Wh forbidden for transport

How many

Up to 2 power banks per person, 160Wh or less each

Using it on board

Using or charging power banks in the cabin is strictly prohibited (medical use excepted)

Where to keep it

Carry on your person or store in the seatback pocket, not the overhead bin

Packing

Individually packaged with plastic bag, protective cap, or insulating tape to prevent short circuits

No. Using or charging power banks in the cabin is strictly prohibited (medical use excepted).

In the airline's own words

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