Flying with Power Banks: Know the Rules

Planning a summer trip soon? If you intend to bring a battery charger for your phone or other devices, familiarize yourself with the latest flight regulations. Rechargeable lithium-ion portable battery chargers, commonly known as power banks, come in various shapes and sizes. They provide a convenient way to charge on the go. However, recent smoke and fire incidents have led aviation authorities worldwide to issue new guidelines, leading airlines to enforce stricter rules for passengers.

Rules for Power Banks on Flights

The primary rule is simple: you cannot pack lithium battery chargers in checked luggage. You must carry them in your hand luggage. In general, travelers may carry two lithium-ion power banks with a capacity of up to 100 watt hours without requiring airline approval. This capacity is sufficient to charge cell phones multiple times.

When it comes to non-rechargeable lithium metal batteries, each battery’s lithium content must not exceed two grams. Typical AA and AAA batteries contain less than a gram of lithium each.

According to the Federal Aviation Authority (FAA), these limits cover most lithium batteries found in ordinary electronic devices. Newer lithium-ion batteries often have a watt-hour (Wh) label. If the capacity is stated in milliampere-hours (mAH), you’ll need some math. Divide the mAH number by 1,000 to convert to ampere hours, then multiply by the device’s voltage, typically 3.7 volts. For example, a 10,000 milliampere-hour battery equals 37 watt hours.

You will need airline approval for larger lithium-ion batteries with capacities between 100 and 160 watt hours, such as those used in professional video equipment or medical devices.

Why Lithium Power Banks Aren’t Allowed in Checked Luggage

Airlines take the risk of lithium battery fires seriously. A significant incident occurred in January 2025 when a fire erupted on an Air Busan plane in South Korea, forcing evacuation. This year, the FAA has reported nine air incidents involving lithium batteries, including six with power banks.

Lithium battery fires in a plane’s cargo hold are hazardous because crews cannot quickly identify or extinguish them. The International Air Transport Association (IATA) states that keeping them in the cabin allows crew members to handle an overheating device using fire-resistant bags and insulated gloves. The chance of a lithium-ion battery short-circuiting is minimal, but the risk posed by fires is serious.

Paul Christensen, a professor at the University of Newcastle, explains that lithium batteries store great amounts of energy in small spaces. Problems arise from crushing, overcharging, or overheating, which can initiate a chemical reaction, producing heat and toxic gases.

He advises inspecting power banks for damage. Indicators like bulging or excessive heat during charging signal potential issues. Avoid cheap, unbranded power banks, as they may lack quality controls, increasing the risk of defects.

In-Flight Rules

Onboard aircraft, strict rules apply to handling power banks in the cabin. Do not store them in the overhead bin. Keep them within reach, such as in the seatback pocket or under the seat in front of you. Do not use power banks to charge devices during the flight, and refrain from charging them using the plane’s power sockets.

If a battery or device slips into the seat, do not attempt to retrieve it. IATA advises that moving a seat to reach it could damage the battery and cause overheating. Instead, notify a cabin crew member, who is trained to handle such situations safely.

Check with Your Airline

FAA highlights that individual airline and international rules might be stricter than U.S. regulations. If uncertain, consult your airline. For instance, Southwest Airlines announced in April a limit of one charger per passenger. Several carriers have comprehensive guidelines regarding lithium-powered devices such as laptops, tablets, and e-cigarettes.

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