Most batteries cannot go in checked luggage — they must travel in your carry-on bag

The U.S. Federal Aviation Administration (FAA) bans most batteries from checked baggage because they pose a fire risk in the cargo hold. Lithium batteries — the kind in phones, laptops, and power banks — are the main concern. They can overheat, catch fire, and spread rapidly in an unpressurized cargo area where a crew member cannot reach them. The rule applies to all commercial flights within and departing from the United States.

Alkaline batteries (AA, AAA, C, D, 9V) are permitted in checked luggage in reasonable quantities for personal use. However, lithium batteries must stay in your carry-on bag. If you are unsure what type of battery powers a device, check the device manual or the battery itself — lithium batteries are usually labeled "lithium ion" or "lithium polymer."

Airlines enforce these rules strictly. Checked bags with prohibited batteries may be removed from the flight, delayed, or confiscated. Some airlines charge fees for violations. The safest approach is to pack all batteries and battery-powered devices in your carry-on.

Key Takeaways

  • Lithium batteries (in phones, laptops, and power banks) must go in your carry-on bag, never in checked luggage.
  • Alkaline batteries (AA, AAA, C, D, 9V) may go in checked luggage in normal quantities for personal use.
  • Battery-powered devices like laptops, tablets, and cameras should travel in your carry-on to protect the batteries inside them.
  • Spare batteries of any type are safer in your carry-on, where crew can respond if a problem occurs.
  • Different airlines may have stricter rules, so check your airline's website before packing.

Which batteries are banned from checked bags

Lithium batteries are the only type banned outright from checked luggage. This includes lithium ion and lithium polymer batteries found in most modern electronics. Phones, laptops, tablets, e-readers, cameras, drones, and power banks all contain lithium batteries. Even a single spare lithium battery in your checked bag can trigger a violation.

The FAA treats lithium batteries as dangerous goods because they can enter a thermal runaway state — a chain reaction where the battery overheats and ignites. In the pressurized cargo hold, this fire cannot be easily controlled. A single battery fire has caused aircraft accidents in the past, which is why the rule exists.

Alkaline batteries (the standard AA, AAA, C, D, and 9V types) are not banned from checked luggage. These are the batteries in remote controls, flashlights, and older devices. You can pack them in checked bags in the quantities you would normally carry for personal use — there is no strict limit, but packing dozens of spare batteries may raise questions.

What to do with devices that contain batteries

Any device with a built-in lithium battery must travel in your carry-on bag. This includes phones, laptops, tablets, smartwatches, wireless headphones, cameras, and portable speakers. The battery is sealed inside the device, so it cannot be removed. The device itself is the prohibited item.

Pack these devices where they will not be crushed or damaged. A damaged battery is more likely to overheat. Keep them away from liquids and extreme heat. If a device feels hot or smells unusual before your flight, do not pack it — report it to the airline instead.

Spare batteries for these devices must also go in your carry-on. If you carry a spare phone battery, laptop battery, or camera battery, it belongs in your carry-on bag, not checked luggage. Label spare batteries clearly so you can find them quickly if security asks.

Packing batteries safely in your carry-on

Carry-on batteries should be protected from short circuits. Tape the terminals (the metal ends) of spare batteries with clear, non-conductive tape so they cannot touch other metal objects or other batteries. This prevents accidental contact that could cause a spark.

Keep batteries in their original packaging when possible. If you have removed them from packaging, store them in a battery case or small plastic bag. Do not pile loose batteries together where they might touch.

Pack batteries and battery-powered devices in an straightforward-to-reach spot in your carry-on. If TSA or the airline asks to inspect them, you should be able to remove them quickly without unpacking your entire bag. This also makes it easier to retrieve your devices after landing.

International flights and airline-specific rules

International flights have the same FAA rules for U.S. carriers, but other countries' airlines may have stricter limits. Some international carriers allow only one or two spare lithium batteries per passenger. Before booking a flight on a foreign airline, check their website for battery rules.

Some airlines prohibit certain types of lithium batteries entirely, even in carry-on bags. Others limit the watt-hour rating (a measure of battery capacity). A typical smartphone battery is around 10–15 watt-hours, which is usually allowed. Larger batteries, like those in power tools or electric scooters, may be banned.

If you are flying with a power bank, check the watt-hour rating on the device. Most phone-sized power banks are under 100 watt-hours and are permitted. Larger power banks may exceed airline limits. Contact your airline directly if you are unsure whether a specific device is allowed.

What happens if batteries are found in checked luggage

If TSA or baggage handlers discover a prohibited battery in your checked bag, the bag may be removed from the flight. Your flight may be delayed while the bag is inspected and the battery is removed. In some cases, the entire bag is confiscated.

Airlines may charge fees for violations, typically $100 to $500 depending on the carrier and the severity. Repeated violations can result in being banned from flying with that airline. The goal is not to punish passengers but to prevent fires, so the best approach is to pack correctly the first time.

If you realize after checking a bag that you packed a battery in it, tell a gate agent or airline representative when ready. Some airlines can retrieve the bag before it is loaded and allow you to move the battery to your carry-on. The sooner you report it, the more likely the airline can resolve it without delaying your flight.

Frequently Asked Questions

Can I pack a power bank in my checked luggage?

No. Power banks contain lithium batteries and must go in your carry-on bag. This applies to all power banks, regardless of size or capacity. If you pack a power bank in checked luggage, it will likely be removed and confiscated.

Are rechargeable batteries allowed in checked bags?

Rechargeable lithium batteries are banned from checked luggage. Rechargeable alkaline batteries are permitted in checked bags in normal quantities. Check the battery label to see whether it is lithium or alkaline. When in doubt, pack it in your carry-on.

What if my laptop battery cannot be removed?

Your laptop must travel in your carry-on bag. Modern laptops have built-in batteries that cannot be removed, so the entire device is subject to the battery rule. Pack it in your carry-on where you can monitor it during the flight.

Can I pack a vape or e-cigarette in checked luggage?

No. Vapes and e-cigarettes contain lithium batteries and are banned from both checked and carry-on luggage on most U.S. airlines. Some airlines prohibit them entirely. Check your airline's rules before packing any vaping device.

How many spare batteries can I bring in my carry-on?

The FAA does not set a strict limit on the number of spare batteries in carry-on bags, but they must be for personal use. Packing dozens of batteries may raise questions from TSA. A reasonable number — a few spares for your devices — is standard and should not cause problems.