Can You Bring a Power Bank on a Plane? Rules, Wh Limits and mAh Conversion

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Yes, you can take a power bank on a plane, but only in your carry-on, never in checked baggage. The lithium batteries inside are a fire risk, and airlines treat them accordingly. Exact rules can vary by airline and country, so confirm with your airline before you fly. The widely used limits below come from international aviation guidance.

The Basic Rules

  • Carry-on only. Power banks must not go in checked luggage.
  • Up to 100Wh: normally allowed without special approval.
  • Between 100Wh and 160Wh: usually needs airline approval, and airlines typically limit you to two.
  • Over 160Wh: generally not allowed on passenger aircraft.
  • Protect the terminals against short-circuit, for example with the original packaging or tape over the ports.

How to Convert mAh to Wh

Power banks are sold in mAh, but airline limits are in Wh. The formula is: Wh = mAh × V ÷ 1000. Most power banks use a nominal 3.7V cell, so:

  • 10,000 mAh ≈ 37 Wh
  • 20,000 mAh ≈ 74 Wh
  • 27,000 mAh ≈ 100 Wh
  • 30,000 mAh ≈ 111 Wh (over the 100Wh line, so it may need approval)

The Wh rating is often printed on the power bank itself. If it is, use that number.

Using a Power Bank in Flight

Some airlines restrict or ban using a power bank during flight, or charging it from seat power. Check your airline’s policy, and keep the power bank within reach, not stuffed in the overhead bin, so it can be dealt with quickly if it overheats.

Tips

  • Buy a power bank with the Wh rating printed on it, so security can check it.
  • Do not travel with a swollen, damaged or hot power bank.
  • If your power bank is over the limit, leave it at home or consider a smaller one.

Picking one? See my best AliExpress power banks and the mAh myth buyer’s guide.