Best Lists
The Best Travel Power Banks for Long-Haul Flights
Keep your phone (and boarding pass) alive from gate to gate.
A dead phone at an airport is a special kind of helpless: no boarding pass, no map, no way to tell anyone your gate just changed. A travel power bank fixes that for the price of a paperback, and unlike most of your gear, there is an actual airline rule that decides which one you are allowed to bring. Get the wrong one and it gets pulled at security.
Here is the rule that matters: power banks have to fly in your carry-on, never checked, and almost every airline caps them at 100 watt-hours, which is roughly 27,000mAh. A typical 10,000mAh travel power bank is nowhere near the limit, so you are fine. It is the giant laptop-charging bricks you have to read the label on.
How to pick the best travel power bank for flights
- Capacity. 10,000mAh charges most phones about twice and clears every airline limit without a second thought.
- Ports and speed. USB-C with fast charging refills your phone in a hurry; a built-in cable or plug means one less thing to lose.
- Watt-hours on the label. If you want a big 20,000mAh-plus bank, check that it reads under 100Wh so security does not take it.
| Capacity | Roughly | Airline status |
|---|---|---|
| 10,000mAh | ~2 phone charges | Allowed, no question |
| 20,000mAh | ~4 charges, or a laptop top-up | Allowed, under 100Wh |
| Over 27,000mAh | Laptop-grade brick | Read the label, may be over 100Wh |
Travel power bank FAQ
Can you bring a power bank on a plane?
Yes, in your carry-on only. Power banks are lithium batteries, so they are banned from checked luggage and have to stay in the cabin with you. Nearly every one under 100Wh, about 27,000mAh, is allowed.
What size power bank can I fly with?
Anything up to 100 watt-hours without special approval, which covers essentially all 10,000mAh and 20,000mAh travel power banks. Above that, some airlines allow up to 160Wh with permission, but you are into rare territory.
Can a power bank go in checked luggage?
No. This is the one people get wrong. Loose lithium batteries and power banks have to fly in the cabin, never in the hold, full stop.
The travel power banks that clear security and actually hold a charge are ranked below.
