Do not pack power banks using an old “five per passenger” screenshot. Korea strengthened its rules in 2026. Check the operating airline's current page for every flight, then count and pack the actual batteries you will carry.
The April 2026 change matters
The official Korea.net report on the transport ministry’s changes identifies a two-power-bank limit from April 20, 2026. Older announcements from earlier in the same year can therefore give a different number.
Korean Air’s current restricted-items guide lists up to two power banks at or below 100 Wh. Power banks over 100 Wh and up to 160 Wh require airline approval; no more than two power banks may be carried in total. For items over 100 Wh and up to 160 Wh, Korean Air also limits power banks and other spare batteries to two combined. Power banks above 160 Wh are prohibited in passenger baggage under these rules. Do not treat an allowance for other spare batteries as extra power-bank slots.
Read the manufacturer’s capacity label
Look for the watt-hour rating on each power bank. If you only see mAh, ask the manufacturer for the rated energy and relevant nominal battery voltage. Watt-hours can be calculated as volts multiplied by mAh, divided by 1,000, but using an arbitrary USB output voltage can produce the wrong answer.
Keep the label readable. A product listing on your phone is useful supporting information, not a guarantee that staff will accept a device with an unidentifiable capacity. Do not carry a swollen, damaged, leaking, or recalled unit merely because the printed capacity is small enough.
Cabin packing is only the first requirement
Power banks belong in cabin baggage, not checked baggage. Protect terminals from short circuits, and follow the carrier's instructions on individual pouches or bags. Loose batteries beside keys, coins, or other metal objects are not a good packing arrangement.
Korean Air also restricts overhead-bin storage and prohibits ordinary in-flight use or charging of power banks. Follow crew instructions about keeping them accessible. If a medical device is involved, contact the airline beforehand about its specific approval procedure rather than assuming a medical exception applies automatically.
Check the flight that is actually operating
For a codeshare or connection, identify each operating airline, not just the brand that sold the itinerary. Send the carrier the number of power banks, each Wh rating, and the flight details when asking for approval. Keep a written response where an approval is required.
A booking confirmation or a check-in agent accepting your suitcase is not separate battery approval. If a cabin bag is taken for gate checking, tell staff that it contains power banks and remove them as directed before the bag leaves you.
If you discover a problem on departure day
Ask airline or airport staff about the permitted options before entering the final boarding process. Do not hide an extra unit, peel off a label, or move it into another passenger's bag without checking the applicable per-person rule.
Before travelling, charge essential devices and keep the phone needed for tickets usable without depending on an in-flight power bank. If a battery becomes hot or behaves abnormally in the cabin, alert the crew immediately. Do not experiment with cooling or repair methods while seated.
Related guides
- Leaving Korea via Incheon Airport: A Departure-Day Checklist
- Power Adapters in Korea: Check 220V Before Plugging In Your Devices
Sources and review date
Official sources checked November 1, 2026. Updated November 1, 2026: clarified the prohibited capacity and combined battery limits. A source's publication or effective date is identified separately where relevant. For a time-sensitive application, booking, or safety issue, confirm the current conditions with the responsible provider.
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