Cathay Pacific power bank rules
What Cathay Pacific’s own page says about power banks, checked 22 October 2026.
The rules
- Each passenger may carry a maximum of two lithium battery power banks
- Prohibited (under Hong Kong law): charging power banks from in-seat power, and using them to charge or power devices
- Never in checked baggage or overhead bins; keep them in cabin baggage under the seat in front
- Spare lithium batteries under 100 Wh: 20 per passenger; 100–160 Wh: 2 per passenger in cabin baggage
- Extra power banks may be confiscated at Hong Kong International Airport security
| Using it on board | Using a power bank to charge or power devices is prohibited |
|---|---|
| Charging the power bank | Charging via in-seat power is prohibited |
| Where to keep it | In cabin baggage under the seat in front; never in overhead bins |
Source: cathaypacific.com, checked 22 October 2026. Rules can change and can differ on codeshare flights, so check with the airline that operates your flight.
Common sizes on Cathay Pacific
| Power bank | Wh | One power bank |
|---|---|---|
| 10,000 mAh at 3.7 V | 37.0 Wh | Allowed |
| 20,000 mAh at 3.7 V | 74.0 Wh | Allowed |
| 27,000 mAh at 3.7 V | 99.9 Wh | Allowed |
| 40,000 mAh at 3.7 V | 148.0 Wh | Allowed |
Wh = mAh ÷ 1000 × V. We show 3.7 V as an example; use the voltage printed on yours. Check yours with the calculator →
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