Can you bring a power bank on a plane? Check the Wh first
Under U.S. rules, power banks go in carry-on baggage; capacity and airline limits decide the rest.
Evergreen U.S. travel guide; FAA page last updated August 11, 2026 and rechecked September 19, 2026.
In this article
Start with the U.S. baseline
The FAA treats a power bank as a spare lithium battery. It must travel in carry-on baggage. If staff take your carry-on at the gate or planeside, remove the power bank and keep it with you in the cabin. Protect its terminals from short circuit, for example with retail packaging or a protective pouch. FAA PackSafe guidance.
The FAA's general limit for a rechargeable lithium-ion battery is 100 watt-hours (Wh). With airline approval, a traveler may carry up to two larger spare batteries above 100 Wh and no more than 160 Wh. Airlines can impose stricter capacity, quantity or use rules, so the federal baseline is not the last check.
Read Wh before converting mAh
If the power bank has a printed Wh value, use that specification when checking the rule. If it lists only milliamp-hours and voltage, the FAA gives the relationship Wh = volts × amp-hours. Convert mAh to Ah by dividing by 1,000.
A label showing 20,000 mAh at 3.7 V implies 20 × 3.7 = 74 Wh. A label showing 30,000 mAh at 3.7 V implies 30 × 3.7 = 111 Wh. Under the U.S. baseline, the first is below 100 Wh; the second would require airline approval if the label and calculation are valid.
Do not substitute a USB port's output voltage for the battery voltage on the capacity label. Do not use a home calculation to contradict a clearly printed Wh rating or to rescue an incomplete, damaged or suspicious label. Ask the manufacturer or airline when the specification cannot be verified.
Use a three-part decision table
| Question | What to verify | Why it matters |
|---|---|---|
| Where will it travel? | Carry-on only; remove it if the bag is gate-checked | Power banks are spare batteries, not ordinary checked-bag electronics |
| What is its capacity? | Printed Wh, or mAh and the matching battery voltage | At most 100 Wh is the general limit; above 100 through 160 Wh needs airline approval |
| Is it in good condition? | No damage, swelling, recall or exposed terminals | Damaged or recalled batteries likely to create heat or sparks must not be carried |
| What does the airline allow? | Capacity, quantity, storage and in-flight-use rules for every carrier on the itinerary | An airline may be stricter than the federal baseline |
Pack it so the crew can respond
- Photograph or write down the model and capacity label before leaving home.
- Place the power bank in a protective pouch where metal objects cannot bridge its terminals.
- Keep it accessible rather than burying it in a checked or gate-checked bag.
- Follow the airline's rules on using or charging it during flight; permission to carry a battery is not automatically permission to use it.
- Tell the crew immediately if it becomes hot, expands, smokes or burns. The FAA says cabin crews are trained to respond to lithium-battery fires.
A damaged or recalled battery may not travel merely because its capacity is small. Check the manufacturer's recall information if the model has been the subject of a notice.
Know what this guide does not decide
This article explains the FAA's U.S. passenger baseline as checked on September 19, 2026. It does not determine the rules of another country, a specific airline, a codeshare partner or a special-use battery. Check each operating carrier before travel, especially when changing airlines.
The arithmetic examples use invented labels and do not verify that any real power bank is accurately marked, safe, undamaged or accepted by an airline. Capacity is one decision input; product condition, packing and carrier policy remain separate checks.
Sources & dates
Sources checked September 19, 2026. Prepared with AI assistance. Read our editorial standards.
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