Last updated: October 2026
Power banks are one of the most common items pulled from bags at airport security. The rules exist because lithium batteries can overheat, and a fire in the cabin is much easier to deal with than one in the hold. Here’s what’s allowed, how to read your power bank’s rating, and tips for a smooth trip. Rules can change, so always confirm with your airline before flying.
Are Power Banks Allowed on Planes?
Yes, in carry-on bags. Power banks are classed as spare lithium batteries, which aviation authorities such as the FAA require to be carried in the cabin, not in checked luggage. If a gate agent checks your carry-on at the gate, remove the power bank and keep it with you.
What Are the Power Bank Capacity Limits on Planes?
Under common rules followed by many airlines, power banks up to 100 watt-hours are allowed in carry-on bags without special approval. Those between 100Wh and 160Wh usually require airline approval and are often limited to two per passenger. Above 160Wh is generally not allowed for passengers.
| Capacity (Wh) | Approx. mAh at 3.7V | Typical rule |
|---|---|---|
| Up to 100Wh | Up to ~27,000mAh | Allowed in carry-on |
| 100–160Wh | ~27,000–43,000mAh | Airline approval, limit of 2 |
| Over 160Wh | Over ~43,000mAh | Generally not allowed |
Rules vary by airline and country. Always check your airline’s latest guidance.
How Do You Convert mAh to Wh?
Multiply the mAh rating by the battery voltage (usually 3.7V for power banks) and divide by 1,000. Many power banks also print the Wh rating directly on the case, which is what security staff look for.
Our guide on what size power bank you need explains how mAh translates into phone charges.
Do Airlines Have Their Own Power Bank Rules?
Some do. Certain airlines restrict using or charging power banks during flight, limit the number you can carry, or require them to be kept within reach rather than in overhead bins. These policies have been changing, so check your airline’s website before you travel, especially on international routes.
What Are the Best Tips for Flying With a Power Bank?
- Keep it in your carry-on and within easy reach.
- Make sure the capacity is printed on the bank; unlabeled banks may be confiscated.
- Protect the ports from metal objects like keys and coins.
- Don’t charge it under a blanket or in a seat pocket; let it ventilate.
- Tell the crew immediately if a power bank gets hot, swells or smokes.
Magnetic packs of 5,000–10,000mAh are well within limits and easy to carry; see our best MagSafe power bank guide.
Frequently Asked Questions
Can I put a power bank in checked luggage?
No. Power banks are spare lithium batteries and must travel in carry-on bags. If your carry-on is checked at the gate, remove the power bank and keep it with you in the cabin.
Is a 20,000mAh power bank allowed on a plane?
Usually yes. At 3.7V, 20,000mAh is about 74Wh, under the 100Wh limit most airlines allow without approval. Check that the capacity is clearly printed on the bank and confirm your airline’s rules.
Can I use my power bank during a flight?
Many airlines allow it, but some restrict using or charging power banks in flight. Follow crew instructions and check your airline’s policy before departure.
How do I know my power bank’s watt-hours?
Look for a Wh rating printed on the case. If only mAh is listed, multiply mAh by 3.7 and divide by 1,000 to estimate Wh. Unlabeled power banks can be refused at security.
How many power banks can I bring on a plane?
For banks under 100Wh, many airlines don’t set a strict number for personal use, though some do. For 100–160Wh banks, the usual limit is two with airline approval. Check your airline’s rules.
The Bottom Line
Power banks fly in carry-on bags only. Under 100Wh, roughly 27,000mAh, is generally allowed, and larger banks may need approval. Check your airline before you go. For travel-friendly magnetic packs well within limits, see our best MagSafe power bank picks.