Can You Bring a Power Bank on a Plane? (2026 Rules)

Yes, you can bring a power bank on a plane, but it must travel in your carry-on baggage, never in checked luggage. This rule is close to universal: aviation authorities worldwide follow the same IATA-based framework, and power banks rated under 100 watt-hours (Wh) are permitted without airline approval. That covers nearly every phone power bank sold today, including common 10,000 mAh and 20,000 mAh models.

Here is a plain-language breakdown: the watt-hour limits, how to convert mAh to Wh, and what to check before you fly.

The carry-on rule: power banks stay in the cabin

A power bank counts as a spare lithium-ion battery, because the battery is not installed in a device the way it is in a phone or laptop. Security authorities are consistent on this point: keep batteries and battery-powered devices on you or packed in your carry-on. Spare lithium-ion batteries, including power banks, are generally only permitted in checked baggage with air carrier approval, and in practice most airlines require them in the cabin.

The reasoning is safety. On rare occasions, lithium batteries can short-circuit and overheat. In the cabin, a problem can be spotted and dealt with quickly. In the cargo hold, it cannot.

Watt-hour limits explained (with a mAh conversion)

Lithium-ion batteries fall into three brackets:

• Under 100 Wh: allowed in carry-on with no approval needed. This covers phones, most laptop batteries and virtually all consumer power banks.
• 100 to 160 Wh: allowed in carry-on with air carrier approval, typically to a maximum of two individually protected spare batteries per person.
• Over 160 Wh: not allowed in carry-on at all.

Power banks are usually labelled in milliamp-hours (mAh) rather than watt-hours, so here is the conversion formula: Wh = volts x (mAh divided by 1,000). Most power bank cells run at 3.7 volts, which means:

• A 10,000 mAh power bank: 3.7 x 10 = 37 Wh, well under the limit.
• A 20,000 mAh power bank: 3.7 x 20 = 74 Wh, still comfortably fine.
• A 27,000 mAh power bank: 3.7 x 27 = 99.9 Wh, right at the line.

If your power bank is around 27,000 mAh or larger, check the label for its printed Wh rating before you fly. Most manufacturers print it next to the capacity. If the rating has worn off and cannot be verified at screening, the battery may not make it through.

What airlines expect

Most carriers follow the same IATA framework: power banks and spare lithium batteries belong in carry-on baggage, individually protected against short circuits. That means keeping them in original retail packaging, a protective pouch or case, or a separate plastic bag, or taping over any exposed terminals.

Airline policies do change, and authorities specifically advise reviewing your carrier's lithium battery policy before flying, so a quick check of the airline website is worthwhile before any trip. Many airlines now also prohibit charging devices from a power bank during the flight, so board with your phone topped up just in case.

What about checked baggage?

Do not put a power bank in checked luggage. Spare lithium-ion batteries of any size are generally only permitted in checked baggage with air carrier approval, and many airlines state plainly that power banks are carry-on only. Devices with installed batteries under 100 Wh, like a laptop, are often technically permitted in checked baggage, but the safer practice is keeping all battery-powered devices in the cabin. When in doubt: cabin.

Quick pre-flight checklist

• Power bank packed in your carry-on or personal item, never checked
• Rated under 100 Wh (roughly under 27,000 mAh at 3.7 V)
• Wh rating still legible on the label
• Terminals protected: pouch, case, plastic bag or original packaging
• No damaged, swollen or recalled batteries in your bag
• Devices charged before boarding, in case in-flight charging is not permitted
• Airline approval arranged if your battery is between 100 and 160 Wh

Shopping for a compliant charger before a trip? Our travel-ready power banks and charging accessories all sit well under the 100 Wh threshold.

Frequently asked questions

How many power banks can I bring?

There is generally no published quantity limit for spare batteries under 100 Wh. The two-per-person cap applies to the 100 to 160 Wh bracket, with airline approval. Pack only what you will reasonably use, keep each one protected, and check with your airline if you are carrying several.

Is a 20,000 mAh power bank allowed?

Yes. At about 74 Wh, it sits under the 100 Wh threshold, so it is permitted in carry-on baggage without approval on virtually every airline.

Can I use my power bank during the flight?

That depends on your airline. Many now prohibit charging devices onboard, so charge everything before you board and check your carrier's policy.

Do these rules apply to international flights?

The watt-hour framework follows IATA guidelines used by airlines worldwide, so the core limits travel with you. Your airline or destination country may add restrictions, though, so confirm before an international trip.