Quick Answer
Yes. In your carry-on only. Power banks are banned from checked luggage. Most airlines allow batteries up to 100Wh without any approval, which covers every pick here (a 20,000mAh bank is roughly 74Wh). Banks from 100–160Wh need airline approval and are usually limited to two; anything over 160Wh is banned outright.
Read the full guide: Best Travel Power Banks 2026: 5 Airline-Safe Picks
How many mAh can I take on a flight?
The real limit is watt-hours (Wh), not mAh. The no-approval ceiling is 100Wh, which works out to roughly 27,000mAh at typical 3.6–3.7V cells, so a 10,000, 20,000 or 25,000mAh bank is fine, and a 27,650mAh bank like the Anker Prime sits just under the line. To convert: Wh = mAh ÷ 1000 × 3.7.
Why do power banks get confiscated at the gate?
Usually one of three reasons: it was packed in checked luggage (not allowed), it exceeds 100Wh without airline approval, or it’s a cheap no-name bank with no printed Wh rating, so staff can’t verify it’s legal. Buy a reputable bank with the Wh clearly printed on the case and keep it in your carry-on, and you’ll sail through. More quick answers live in our answers hub .