United Airlines power bank rules
What United Airlines’s own page says about power banks, checked 22 October 2026.
The rules
- Each passenger can bring up to two portable chargers
- Keep them on you or in your personal item during the flight
- They cannot be placed in overhead bins or recharged using aircraft power
- Lithium-ion batteries can’t exceed 100 Wh; you can carry up to two larger than 100 Wh but not over 160 Wh in your carry-on
- Spare batteries, including portable chargers, go in cabin bags only
| Using it on board | Not stated on the page we checked |
|---|---|
| Charging the power bank | Cannot be recharged using aircraft power |
| Where to keep it | On you or in your personal item; not in overhead bins |
Source: united.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 United Airlines
| 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 →
United Airlines cabin bag size
Packing your hand luggage too? See the United Airlines cabin bag size and weight allowance, or check your bag against 36 airlines with the cabin bag checker.
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