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Yes. You can generally take a power bank on a passenger plane, but it must travel in your carry-on baggage, not checked luggage. Under U.S. FAA passenger guidance, a bank rated at 100 watt-hours (Wh) or less is allowed; larger banks have tighter limits. IATA’s 2026 passenger guidance recommends no more than two power banks, each no more than 100 Wh. Your operating airline may be stricter, so check its current rules before flying.
Power bank rules at a glance
| Battery capacity | FAA passenger guidance | What to do |
|---|---|---|
| 100 Wh or less | Allowed on passenger aircraft. Spare batteries and power banks must be in carry-on baggage. | Pack it in your carry-on and check your airline’s quantity limits. |
| 101–160 Wh | Requires air-carrier approval; no more than two qualifying spare lithium-ion batteries per person. | Contact the operating airline for approval before travel. Do not assume it will accept the bank. |
| More than 160 Wh | Not allowed on passenger aircraft under FAA guidance. | Do not bring it on the flight. |
These are FAA passenger thresholds for the United States. The FAA notes that airlines may set stricter limits. Separately, IATA’s 2026 passenger guidance says passengers are limited to a maximum of two lithium-ion power banks, each not exceeding 100 Wh. Follow the operating airline’s rules for your itinerary, rather than treating either guidance as a universal rule for every country or carrier. FAA passenger battery guidance; IATA passenger guidance.
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Pack a power bank in your carry-on, not checked luggage
A power bank is treated as a spare lithium-ion battery. Keep it in the cabin; do not pack it in checked baggage. If your carry-on bag is taken at the gate, remove the power bank and keep it with you in the cabin. TSA screening guidance also directs spare power banks to carry-on baggage and refers travelers to FAA limits: TSA’s list of what you can bring.
How to check a power bank’s capacity
Look for the watt-hour rating, usually marked “Wh,” on the power bank or its manufacturer label. Watt-hours measure stored energy; watts measure output power, so do not use a watt figure as the capacity rating.
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If the label gives only milliamp-hours (mAh) and the battery’s nominal voltage, calculate the capacity this way:
Wh = (mAh ÷ 1,000) × volts
For example, a 10,000 mAh battery at 3.7 V is 37 Wh: 10,000 ÷ 1,000 × 3.7 = 37. Use the battery’s nominal voltage, not a USB charging-output voltage. The FAA explains how to calculate Wh when it is not marked. If a bank’s rating is unreadable or its capacity cannot be documented, do not assume the airline will accept it; the carrier may need to verify it. FAA guidance on battery capacity.
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Protect the terminals and avoid damaged batteries
Prevent exposed battery terminals from contacting metal objects or other batteries, which can cause a short circuit. IATA describes several ways to protect spare-battery terminals:
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- Insulate exposed terminals.
- Place it in an individual plastic bag or protective pouch.
A dedicated pouch is one option, not a stated requirement. Do not take a battery likely to spark or generate dangerous heat aboard unless it has been removed or made safe, as the FAA advises. FAA battery safety guidance; IATA terminal-protection guidance.
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Check the rules for your airline and route
The thresholds above summarize FAA guidance for U.S. passenger travel; they are not a country-by-country comparison. For international trips and connections, check the operating airline and the relevant local authority. Confirm the carrier’s current rules before you leave, especially if your power bank exceeds 100 Wh or you plan to carry more than one.
Quick Recap
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