Power Bank in Suitcase: New Warning Due to Lithium Batteries

A fresh aviation safety campaign warns summer travelers: power banks, spare batteries, vapes, and many everyday electronic devices are not just convenience items in luggage, but can represent a real fire risk if placed incorrectly. The most important message for Hungarian travelers is clear: spare lithium batteries and power banks should be placed in carry-on luggage, not in checked suitcases, and airline rules should be checked before boarding.

The UK Civil Aviation Authority's summer warning, launched on June 26, became important international travel news because it does not concern a rare technical detail. According to the authority, passengers may pack batteries in the wrong place more than 100 million times a year, while the number of onboard incidents related to lithium batteries is rising rapidly. The campaign was timed to appear at the start of the British summer peak season, but the lessons are relevant not only for those traveling to the United Kingdom. We carry the same devices from Budapest, Vienna, London, Barcelona, or Istanbul: phones, laptops, headphones, cameras, e-readers, drones, electric shavers, electric toothbrushes, spare batteries, and external chargers.

The topic is particularly relevant for Hungarian travelers because in the summer season, many depart on low-cost flights with only carry-on luggage, and then, during crowded boarding, they must hand over their rolling bags at the gate. In such cases, it is easy to forget that the power bank, spare battery, or e-cigarette remaining in the bag is no longer traveling where it should be. Those departing from Budapest Airport or Vienna Airport should check their luggage before departure just as much as those returning home from London's Heathrow, Gatwick, or Luton airports.

What happened now?

According to the UK CAA's new campaign, aviation remains extremely safe, but the number of lithium-battery-powered devices carried by passengers has increased so much that incorrect packing has become a separate safety risk. According to the authority's data, reports of overheating or failure of passenger devices nearly doubled between 2024 and 2025, with a 98 percent annual increase. There has also been an increase in cases where lithium-battery devices were placed incorrectly in checked luggage.

The warning highlights several practical data points. According to the British authority, lithium battery incidents occur roughly twice a week. Surveys show that more than a third of passengers are unaware of why it is dangerous to put a battery in a checked suitcase. Meanwhile, most people travel with multiple such devices: phone, laptop, power bank, smartwatch, and headphones often end up in the bag at once. On a large, full long-haul flight, this could mean several thousand battery-powered devices.

The news is not about a general ban on power banks on planes. Rather, it is about explaining the old rule again and much more loudly: spare lithium batteries and power banks must remain in the cabin, where the crew can quickly detect if a device overheats, smokes, or is damaged. In the cargo hold, the same event is much harder to detect and manage.

What does this mean in practice?

The most important rule is simple: do not put the power bank, spare battery, or vape in checked luggage. These should be kept in carry-on luggage, preferably in an easily accessible place. If the carry-on luggage is taken away at the gate and sent to the cargo hold, lithium-battery devices, especially power banks, spare batteries, e-cigarettes, and smart bags with removable batteries, must be removed from it.

The International Air Transport Association (IATA) passenger guide emphasizes the same principle: phones, laptops, cameras, drones, power banks, spare batteries, and similar devices must be carried in carry-on luggage. The contacts of loose batteries must be protected, for example, in the original packaging, in a case, or with taped poles, to prevent short circuits. Damaged, swollen, or abnormally overheating batteries should not be taken on the plane.

The rule is also important because many passengers only think about security screening, not about manageability during the flight. If a device begins to overheat in the cabin, the crew can isolate it and handle the event according to trained procedures. If the same happens in the cargo hold, the problem may be discovered much later. Therefore, it is not enough that the device is small, new, or has always worked well before.

Which items require special attention?

Most travelers do not think of everyday electronics as dangerous goods. Yet, from a regulatory standpoint, several everyday items can fall into this category if they contain a lithium battery. The most common risky categories are as follows:

• power banks and portable phone chargers;
• spare camera, drone, or laptop batteries;
• e-cigarettes and vape devices, if permitted by the airline and destination country;
• laptops, tablets, e-readers, and cameras;
• smart bags in which a removable battery powers GPS, locks, scales, or charging functions;
• electric shavers, toothbrushes, hair stylers, and smaller battery-powered devices;
• medical devices, hearing aids, and certain health measuring devices, for which separate rules may apply.

The UK CAA specifically highlighted that generally, a maximum of two power banks can be taken, and the power bank itself must not be charged on board. Some airlines may apply more detailed or stricter regulations, so it is not enough to pack from memory, especially for long-haul, connecting, or non-European trips. The rules of the destination country and the airline may differ, for example, for vapes, drones, or higher-capacity batteries.

What is the situation with watt-hours and larger batteries?

The battery used for most phones, headphones, or average power banks is low capacity, but the capacity limit becomes important when someone travels with larger photography, filming, drone, or work equipment. According to theATA guide, lithium-ion batteries up to 100 watt-hours can generally be taken in carry-on luggage. Batteries between 100 and 160 watt-hours often require airline approval. Batteries over 160 watt-hours are usually not permitted on passenger flights as normal passenger luggage.

This may be significant not only for professional photographers or content creators. A larger drone battery, video light, portable workstation, or special device may fall into a category where, without prior notification to the airline, the passenger may face unpleasant surprises at check-in or security screening. If the battery does not have a clearly visible watt-hour marking, it is advisable to check the manufacturer's data sheet before departure.

Why does this affect Hungarian travelers too?

The British campaign uses British data, but the risk is not a British peculiarity. Previous recommendations from the European Union Aviation Safety Agency (EASA) also treat power banks and e-cigarettes as particularly risky and emphasize that these do not belong in checked luggage. The US FAA guide also stipulates that spare lithium batteries and power banks must be kept in the cabin, along with protection against short circuits.

From a Hungarian perspective, the most common problem is not that someone intentionally violates the rules, but that the packing logic is wrong. Many put everything that is not needed on the plane into the large suitcase: spare chargers, electric shavers, drone batteries, old phones, power banks. Others pack correctly into the cabin bag, but the bag is taken at the gate and they do not remove the batteries from it. Others again face stricter rules during transfers or on the return journey than at departure.

This can be a practical issue especially for those heading to London, as many Hungarian passengers use the Budapest and Vienna to London flights during the summer peak season. Those flying, for example, from Budapest to Heathrow, Budapest to Gatwick, or Budapest to Luton must pay attention to the return British airport information in addition to the luggage check. Before departure, it may also be useful to check the Budapest, Vienna, or Heathrow flight information, especially if more time is needed at the airport due to repacking luggage.

What should the passenger do before departure?

The best solution is a short, targeted luggage check at home. It is not enough to ask if everything fits in the bag. One must also think through which device contains a battery, which battery is a spare, and which bag may go into the cargo hold. Place the power bank, spare battery, vape, and removable smart bag battery in a separate, easily removable carry-on luggage compartment. Protect loose batteries in a case or original packaging. If a laptop is placed in checked luggage, turn it off completely, do not just put it in sleep mode.

It is worth searching the airline's website for rules regarding "dangerous goods", "lithium batteries", "power banks", or in Hungarian, batteries and dangerous goods. With low-cost airlines, it is particularly important that the fate of the small onboard bag and the larger cabin suitcase may differ: what the passenger considers carry-on luggage, the staff may still send to the cargo hold during boarding. In such cases, one should not argue, but quickly remove those devices that must remain in the cabin.

If a device on the plane is unusually hot, smokes, emits a pungent smell, is damaged, or falls into the gaps of the seat, do not continue to use it or try to pry open the seat yourself. IATA and other authorities' guides suggest that in such cases, the crew must be notified immediately. The cabin crew is trained to handle such situations; the passenger's role is to signal the problem in time.

Not a ban, but preparation

The essence of the fresh warning about lithium batteries is not that one must travel with less technology. Modern travel is a natural part of phones, online boarding passes, noise-canceling headphones, digital cameras, and spare chargers. The problem begins when these devices are placed in the wrong place, are damaged, short-circuit, or the crew cannot access them in case of potential overheating.

For Hungarian travelers, the best advice is simple: before departure, do not only check liquids, documents, and boarding passes, but also batteries. The power bank should remain in the cabin, the spare battery should be protected, airline approval should be obtained for higher-capacity devices, and electronic devices should be removed from bags handed over at the gate. This is a few minutes of extra attention, but it can save a delay, a suitcase search, or in a worst-case scenario, an onboard safety situation.

In the summer flight season, there are many variable factors anyway: crowded terminals, weather disruptions, delays, transfer risks, and different airport processes. Packing is one of the few things that the passenger can completely control. The message of the current warning is therefore not complicated: flight safety begins at home, before zipping up the suitcase.