What size power bank can I take on Cathay Pacific?
Up to Under 100 Wh.
Source: Cathay Pacific official page, checked 6 Nov 2026
Quick answer
Yes, in your carry-on only. How many: 2. Maximum size: Under 100 Wh. On board: Hong Kong law: no charging from in-seat power and no powering devices.
Source: Cathay Pacific official page, checked 6 Nov 2026
How many
2
Source: Cathay Pacific, checked 6 Nov 2026
Maximum size
Under 100 Wh
Source: Cathay Pacific, checked 6 Nov 2026
Using it on board
Hong Kong law: no charging from in-seat power and no powering devices
Source: Cathay Pacific, checked 6 Nov 2026
Where to keep it
Under the seat in front; never in checked bags or overhead bins
Source: Cathay Pacific, checked 6 Nov 2026
Can I take a 20,000 mAh power bank on Cathay Pacific?
Yes. A typical 20,000 mAh power bank at 3.7 V is 74 Wh (20,000 × 3.7 ÷ 1,000). Check the Wh printed on yours.
Source: Cathay Pacific official page, checked 6 Nov 2026
Can I take a 30,000 mAh power bank on Cathay Pacific?
No. A typical 30,000 mAh power bank at 3.7 V is 111 Wh, which is over 100 Wh.
Source: Cathay Pacific official page, checked 6 Nov 2026
Can I put a power bank in checked baggage on Cathay Pacific?
No. Power banks are banned in checked bags on every airline, including bags checked at the gate. Take it out and carry it in the cabin.
Source: IATA guidance on the ICAO rule, checked 6 Nov 2026
Is there a national power bank rule in Hong Kong?
Yes: Departing HKIA: max 2 power banks per passenger, carry-on only; recharging power banks prohibited in flight (Civil Aviation Department (CAD) DGAC 2/2026, from 2026-03-28).
Source: cad.gov.hk
How many Wh is my power bank?
Wh = mAh × volts ÷ 1,000. Most power banks use 3.7 V cells. The last column applies Cathay Pacific's rule.
| Capacity | Watt-hours at 3.7 V | Allowed on Cathay Pacific? |
|---|---|---|
| 10,000 mAh | 37 Wh | Yes |
| 20,000 mAh | 74 Wh | Yes |
| 26,800 mAh | 99.2 Wh | Yes |
| 30,000 mAh | 111 Wh | No |
Source: FAA PackSafe: lithium batteries, checked 6 Nov 2026