A fire in the hold where no one can see it until it's too late
As summer air travel surges across Britain, aviation authorities have identified the quiet contents of passengers' luggage — phones, vapes, power banks — as the single greatest threat to aircraft safety. Lithium battery incidents in hold baggage nearly doubled in a single year, reaching 643 detected cases in 2025, with two incidents now occurring weekly in British airspace. The danger is not hypothetical: a fire in the cabin can be seen and fought, but a fire buried in the hold can burn unchecked toward catastrophe. In this moment, the most consequential safety decision in aviation belongs not to pilots or engineers, but to the traveler standing at a suitcase deciding what to pack.
- Lithium battery incidents in UK aircraft hold luggage nearly doubled in one year — from 316 to 643 — turning an overlooked hazard into the top safety threat in British aviation.
- The physics are unforgiving: a defective or counterfeit battery can ignite with ferocious speed, and in the hold, buried beneath suitcases, no crew member can see it or stop it before it becomes catastrophic.
- Real incidents are already happening — an EasyJet flight diverted to Rome over a hold-bag power bank, and footage of flames erupting from overhead bins on an Air China flight circulated globally, making the abstract danger viscerally real.
- Authorities and airlines have launched awareness campaigns timed to the start of school summer holidays, urging passengers to carry all lithium devices in the cabin, limit power banks to two, and power down checked devices entirely.
- The rules exist but compliance remains dangerously low, with many travelers unaware of or indifferent to restrictions — leaving prevention dependent on changing individual behavior at the moment of packing.
As British families begin packing for summer holidays, aviation authorities are sounding an alarm about something most travelers never consider: the batteries inside their phones, vapes, and power banks. Lithium battery fires have quietly become the single greatest safety risk to aircraft, yet the devices containing them keep appearing in hold luggage at rates that nearly doubled in a single year — from 316 detected cases in 2024 to 643 in 2025. Incidents of batteries overheating or malfunctioning climbed from 123 to 206 in the same period. The Civil Aviation Authority now estimates roughly two lithium battery incidents occur somewhere in British airspace every week.
The danger is rooted in the technology itself. Lithium batteries concentrate enormous energy into a small space — which is why they power modern life — but when defective or overheated, that energy becomes a fire that spreads rapidly and resists conventional suppression. In the cabin, crew can see and respond. In the hold, a fire burns unseen until it is beyond control. The threat is no longer theoretical: an EasyJet flight diverted to Rome after a power bank was found in checked luggage, and footage of flames erupting from overhead bins on an Air China flight spread worldwide after a lithium battery ignited mid-flight.
The rules are clear but widely ignored. All lithium devices must travel in the cabin. Passengers are limited to two power banks each, which cannot be charged in flight. Devices placed in checked luggage must be fully powered off. Airlines UK and the Civil Aviation Authority have launched a campaign timed to the start of the school holidays to push these restrictions into public awareness.
Two converging trends make the moment urgent. People now travel with more lithium-powered devices than ever — the average passenger carries four — while air travel volumes are surging with the summer season. Experts at Electrical Safety First note that counterfeit and substandard batteries, often bought through third-party online sellers, are the most common culprits in incidents. Most batteries are safe; the ones that are not can fail in ways that genuine products do not. Authorities are betting that awareness can shift behavior before an incident occurs that changes everything.
As summer holidays approach and airports fill with families heading to the beach, British aviation authorities are sounding an urgent alarm about something most travelers barely think about: the batteries in their phones, vapes, and power banks. Lithium battery fires have become the single greatest safety risk to aircraft, yet the devices that contain them keep appearing in hold luggage at alarming rates.
The numbers tell a stark story. In 2024, UK authorities detected 316 lithium-powered devices hidden in checked baggage. By 2025, that figure had nearly doubled to 643. Incidents of batteries overheating or malfunctioning followed the same trajectory, climbing from 123 reports to 206 in just twelve months. The Civil Aviation Authority now estimates that roughly two lithium battery incidents occur somewhere in British airspace each week. The average passenger, the CAA notes, travels with four different devices powered by these batteries—phones, laptops, smartwatches, vapes, power banks—often without fully understanding the risk they pose.
The danger lies in the physics of the technology itself. Lithium batteries pack enormous amounts of energy into a tiny space, which is precisely why they power modern life. But when a battery overheats or is defective, that concentrated energy becomes a fire that spreads with ferocious speed and resists conventional firefighting. In the cabin, crew members can see a problem developing and respond. In the hold, buried beneath suitcases and out of sight, a fire can burn unchecked until it becomes catastrophic. Last month, an EasyJet flight diverted to Rome after a power bank was discovered in checked luggage. In October, video circulated worldwide showing flames erupting from the overhead bins of an Air China flight, the result of a lithium battery igniting at altitude.
The rules exist but many passengers ignore them or simply don't know they exist. Lithium devices must travel in the cabin, not the hold. Power banks are limited to two per person and cannot be charged during flight. Laptops and similar devices should be powered down completely before being checked. The Civil Aviation Authority and Airlines UK have launched a campaign to remind travelers of these restrictions as the school summer holidays begin, starting this week in Scotland and rolling out across the rest of the UK in the coming weeks.
Tim Alderslade, chief executive of Airlines UK, frames the problem plainly: prevention begins when passengers pack their bags. The airline industry has trained pilots and cabin crew to handle emergencies, but the best outcome is always to prevent the emergency from occurring in the first place. Giuseppe Capanna, a product safety engineer at the charity Electrical Safety First, adds another dimension to the concern. Most lithium batteries are safe, he explains, but substandard versions—often purchased through third-party sellers online—are the usual culprits in incidents. A counterfeit power bank or a vape made to cut corners can fail catastrophically in ways that genuine products do not.
What makes this moment particularly urgent is the convergence of two trends. Electronic devices have become ubiquitous; the average person now owns more lithium-powered gadgets than ever before. Simultaneously, the volume of air travel is surging as summer holidays begin. Thousands of passengers will pack bags this week without thinking about the batteries inside them. Some will put those devices in hold luggage out of habit or ignorance. The authorities are betting that awareness campaigns can change behavior before an incident occurs that changes everything.
Notable Quotes
The risk of lithium battery incidents was a growing challenge as the number of electronic devices people use increases. The best outcome is always prevention, which starts when passengers pack their bags.— Tim Alderslade, Chief Executive of Airlines UK
When these products are packed in your baggage, there is no access to them. If something goes wrong, they can cause a really devastating fire that can have real dangerous consequences.— Giuseppe Capanna, product safety engineer at Electrical Safety First
The Hearth Conversation Another angle on the story
Why has this become such a visible problem now? Lithium batteries have existed for years.
The batteries themselves haven't changed much, but the number of devices we carry has exploded. Everyone has a phone, a power bank, maybe a vape or smartwatch. The average passenger now travels with four lithium devices. That's four times the risk exposure compared to a decade ago.
But surely airlines have systems to detect these things in luggage?
They do screen bags, but detection isn't perfect. And even when devices are found, it creates delays and diversions. The real fear is the ones that slip through—a fire in the hold where no one can see it or reach it until it's too late.
Is this a problem with the batteries themselves, or with how people use them?
Both. Most genuine batteries are safe. The issue is counterfeit or substandard versions sold online, combined with passengers not understanding the rules or not caring about them. Someone buys a cheap power bank, throws it in their checked bag, and doesn't think twice.
What happens if a lithium battery fire starts in the hold during flight?
That's the nightmare scenario. The fire spreads fast and is hard to extinguish. In the cabin, crew can see it and act. In the hold, it burns unseen. That's why the authorities are so emphatic about keeping these devices in the cabin where they can be monitored.
Are passengers actually listening to these warnings?
The CAA doesn't think so. The fact that incidents nearly doubled in a year suggests most people either don't know the rules or don't believe they apply to them. That's why they're ramping up the messaging now, before summer travel peaks.