Most travellers pack at least one lithium-powered device without thinking twice: a phone, laptop, tablet, camera, vape, pair of headphones or portable charger. But in 2026, aviation safety authorities are warning that millions of batteries are still being packed in the wrong place — and that mistake can get bags pulled from flights, delay travel or create a serious safety risk in the cargo hold.
Before you check a suitcase or hand over a carry-on at the gate, it is worth knowing which battery-powered items must stay with you in the cabin.
The 2026 Battery Warning Travellers Should Not Ignore
This issue is not about rare equipment or unusual travel gear. It is about everyday items that almost everyone now carries through an airport. Power banks and batteries.
A recent aviation safety campaign warned that more than 100 million lithium batteries had been packed incorrectly. That number shows how many travellers are still confused about the difference between checked luggage, carry-on baggage and gate-checked bags.
Lithium batteries can overheat, smoke or catch fire if they are damaged, poorly packed, overcharged, exposed to heat or affected by a manufacturing defect. If that happens in the cabin, the crew can see it and respond quickly. This can trigger a process called thermal runaway, where the battery heats itself faster than it can cool down.
If that happens in the cabin, the crew can see it and respond. If it happens inside a suitcase buried in the cargo hold, it is much harder to access.
That is why battery rules are not just airport bureaucracy. They are there because a small device in the wrong bag can create a serious safety risk.
Do Not Check These Battery-Powered Items
Before you check a suitcase, look for anything powered by a lithium battery.
Keep these items in your carry-on or personal item:
- Power banks
- Portable phone chargers
- Spare camera batteries
- Spare laptop batteries
- Spare drone batteries
- Phone battery charging cases
- Loose rechargeable batteries
- Vapes and e-cigarettes
- Battery packs for camera gear
- Removable smart-luggage batteries
You should also think carefully before checking:
- Phones
- Laptops
- Tablets
- Cameras
- Headphones
- Smartwatches
- E-readers
- Handheld gaming devices
Some devices with batteries installed may be allowed in checked luggage depending on the airline and destination, but they must be powered off and protected. In real travel terms, it is usually smarter to keep them with you.
Checked bags get tossed, dropped, delayed and sometimes lost. Your laptop does not need that character-building experience.
Spare Batteries vs. Built-In Batteries
This is where travellers get confused.
A spare battery is a battery that is not installed inside the device it powers. A power bank is also treated like a spare battery, even though the battery is sealed inside its own case.
Spare batteries and power banks belong in the cabin.
A built-in battery is already installed inside a device, like a laptop, phone, tablet or camera. These items may have different rules, depending on the airline and the type of battery. But if they are checked, they should be fully powered off, protected from damage and packed so they cannot accidentally turn on.
The easiest rule to remember is this:
If the battery is loose, removable or used to charge something else, do not check it.
The Gate-Check Battery Trap
This is the mistake that catches even experienced travellers.
You pack your carry-on correctly at home. Your power bank is inside your roller bag. Your spare camera battery is in a pouch. Everything seems fine.
Then you get to the gate and the agent says the overhead bins are full. Suddenly, your carry-on is being tagged and sent underneath the plane.
At that moment, your carry-on has effectively become checked luggage.
Before you hand it over, remove:
- Power banks
- Spare batteries
- Vapes
- Battery charging cases
- Medications
- Travel documents
- Valuables
- Anything you cannot afford to lose
Keep those items in your personal item under the seat.
This is why we recommend keeping all spare batteries and chargers in one small battery pouch near the top of your bag. If your carry-on gets gate-checked, you can remove the pouch in seconds instead of digging through your luggage while everyone behind you silently judges your life choices.
Check the Watt-Hours Before You Fly
Airlines do not judge batteries only by size. They use watt-hours, usually written as Wh.
Most ordinary power banks are under 100 Wh and are usually allowed in carry-on baggage. Larger batteries may require airline approval, and very large batteries may not be allowed on passenger flights.
Here is the general rule:
| Battery rating | What it usually means |
|---|---|
| Under 100 Wh | Usually allowed in carry-on baggage |
| 101–160 Wh | Usually requires airline approval |
| Over 160 Wh | Generally not allowed in normal passenger baggage |
A typical 10,000 mAh power bank is usually around 37 Wh. A 20,000 mAh power bank is often around 74 Wh. Larger laptop power banks can get close to or above the 100 Wh limit, so always check the label.
Look for the Wh rating printed on the battery or power bank. If you only see mAh, check the voltage and calculate watt-hours using this formula:
Volts x amp-hours = watt-hours
For example, a 20,000 mAh power bank is 20 amp-hours. If it is rated at 3.7 volts, the calculation is:
3.7 x 20 = 74 Wh
If the label has rubbed off or the rating cannot be confirmed, the airline may refuse the battery. A mystery charging brick is not something you want to explain while boarding has already started.
Protect Battery Terminals
Loose batteries should never be thrown into a bag with keys, coins, cables or metal objects. If the terminals touch metal, the battery can short-circuit.
To pack batteries safely:
- Leave them in their original packaging when possible
- Cover exposed terminals with tape
- Use a battery case or sleeve
- Store each battery separately
- Use a protective pouch or small plastic bag
- Keep batteries away from sharp or heavy items
This is especially important for camera batteries, drone batteries and loose rechargeable cells.
Damaged or Recalled Batteries Should Not Fly
Do not travel with a battery that is swollen, cracked, leaking, unusually hot or damaged.
A swollen power bank is not “probably fine.” It is damaged and should be taken to an appropriate recycling or disposal location, not packed in a suitcase.
You should also check for product recalls before flying, especially if you travel with older power banks or high-capacity chargers. Some recalled batteries and power banks may be prohibited from both carry-on and checked baggage because they pose a fire risk.
If a battery looks questionable, leave it at home. Replacing a charger is cheaper than dealing with a safety incident at the airport.
What About Vapes?
Vapes and e-cigarettes should not go in checked luggage. They contain batteries and must travel in the cabin.
They should also not be used or charged on the plane. Treat them like other lithium-powered devices: keep them accessible, protect them from accidental activation and follow the airline’s rules.
Even if you are not a vape user, this matters if you are packing for someone else. A vape tossed into a checked suitcase can create the same kind of battery problem as any other lithium-powered device.
What About Smart Luggage?
Smart luggage can be convenient, but it creates another battery issue.
A smart bag is luggage with built-in charging, GPS tracking or other battery-powered features. If the bag is going into the cabin and fits carry-on size limits, it may be allowed. But if the bag must be checked, the battery usually needs to be removed and carried into the cabin.
If the battery cannot be removed, the airline may refuse to accept the bag as checked luggage.
Before travelling with smart luggage, find the battery compartment at home. Do not wait until the check-in counter to discover that the removable battery is hidden behind a panel you have never opened.
What About Drones and Camera Gear?
Drones, cameras and professional video equipment often come with multiple lithium batteries. These are exactly the kind of items travellers need to organize before flying.
The drone itself may be permitted in checked luggage on some airlines, but the lithium batteries usually need to be removed and carried in the cabin. Spare camera batteries should also stay in your carry-on, individually protected from short circuits.
If you are travelling with several batteries for photography or video work, check your airline’s quantity limits before leaving home. Some airlines are stricter than others.
What To Do If a Battery Overheats on the Plane
If a battery or device becomes hot, starts swelling, smokes or smells strange during a flight, tell the cabin crew immediately.
Do not put it in the overhead bin. Do not hide it in your bag. Do not carry it to the washroom. And definitely do not pretend it is not happening because you do not want to cause a scene.
Cabin crews are trained to respond to lithium battery incidents. The sooner they know, the safer everyone is.
The Two-Minute Battery Check Before Every Flight
Before you leave home, do this quick battery check:
- Gather every power bank, charger and spare battery.
- Check each battery for swelling, cracks, heat or damage.
- Look for the Wh rating.
- Check for product recalls if the battery is older or unfamiliar.
- Put all power banks and spare batteries in one carry-on pouch.
- Protect loose battery terminals with tape, packaging or cases.
- Check your operating airline’s battery rules.
- Before gate-checking a carry-on, remove the battery pouch.
This routine takes less than two minutes, but it can prevent delays, confiscated items and serious safety problems.
Carry-On Battery Packing Checklist
Use this checklist before every flight:
- Power banks in carry-on only
- Spare batteries in carry-on only
- Vapes in carry-on only
- Battery terminals protected
- Watt-hours checked
- Recalled or damaged batteries removed
- Smart luggage battery removable
- Airline policy checked
- Battery pouch easy to grab before gate-checking
The key is not to stop travelling with electronics. The key is to stop packing them on autopilot.
Flying With Batteries in 2026
Can I pack a power bank in checked luggage?
No. Power banks should go in your carry-on bag or personal item, not checked luggage.
Can I bring a power bank on a plane?
Yes, most ordinary power banks are allowed in carry-on baggage if they are under the airline’s watt-hour limit. Many common power banks are under 100 Wh, but you should always check the label and your airline’s policy.
What happens if my carry-on gets checked at the gate?
Remove all power banks, spare batteries and vapes before handing over the bag. Once your carry-on goes under the plane, it must follow checked-luggage battery rules.
Can laptops go in checked luggage?
Some airlines may allow laptops in checked luggage if they are completely powered off and protected from damage, but it is safer to keep laptops in your carry-on when possible. Airline rules vary.
Can phones go in checked luggage?
Phones with installed batteries may be treated differently from spare batteries, but you should keep phones with you in the cabin. They are valuable, easy to damage and useful if your checked luggage is delayed.
Are vapes allowed in checked luggage?
No. Vapes and e-cigarettes should not be packed in checked luggage. They must be carried in the cabin and should not be used or charged during the flight.
What does 100 Wh mean?
Wh stands for watt-hours. It measures battery capacity. Most standard travel power banks are under 100 Wh, but larger laptop power banks may exceed that limit.
What if my power bank does not show watt-hours?
Look for voltage and amp-hours on the label. Multiply volts by amp-hours to calculate watt-hours. If you cannot confirm the rating, the airline may refuse the battery.
Can I fly with a damaged power bank?
No. Do not fly with a swollen, cracked, leaking, overheating or recalled battery.
Are AirTags and luggage trackers allowed?
Small luggage trackers are generally treated differently from power banks, but you should still check your airline’s policy before flying. A tracker is not the same as a large portable charger.
Final Advice
The battery rules are not there to annoy travellers. They exist because lithium batteries can become dangerous when they are damaged, overheated or packed where nobody can reach them quickly.
Before you check a bag, open it and look for anything with a battery.
Power banks, spare batteries and vapes stay with you. Devices should be powered off and protected. And if your carry-on gets taken at the gate, remove the battery pouch before the bag goes underneath the plane.
It is a small habit, but it is the kind of travel habit that can save your gear, your bag and possibly your flight.