Aviation authorities are urging passengers to keep power banks in carry-on luggage rather than checked bags to prevent mid-air fires. According to Amor Abdelkader, an associate professor of advanced materials at Bournemouth University, lithium-ion batteries—the core component of power banks—are prone to “thermal runaway,” a self-heating chain reaction that can trigger explosions if the battery is damaged, poorly designed, or exposed to excessive heat.
Why Power Banks Must Stay in the Cabin
Regulations in the UK and New Zealand require passengers to transport power banks and other lithium-battery-operated devices in the cabin. This policy exists because cabin crews can respond immediately if a device begins to smoke or ignite. In the cargo hold, a fire caused by a battery may go unnoticed until it becomes uncontrollable.
Pro Tip: Never charge your phone or tablet using a power bank while on the plane. Airlines generally limit passengers to two power banks each to reduce the total volume of combustible material on board.
The Science of Battery Hazards
Lithium-ion batteries generate heat during every charge and discharge cycle. When this heat isn’t properly managed, the internal temperature can rise rapidly. Abdelkader notes that poor manufacturing, physical damage from drops, or exposure to moisture can lead to circuit failure. If the circuitry fails, the device may surge electricity or ignite.
The risks extend beyond air travel. In 2017, a UK family lost their home after a power bank plugged into a wall outlet overheated and caught fire. Similarly, in Queensland, Australia, an unattended power bank left in a vehicle on a hot day exploded, igniting the car. These incidents highlight that environmental temperature plays a significant role in battery stability.
Rising Risks: Counterfeits and E-Waste
The global market for power banks has been flooded with counterfeit products, which often lack the safety features of reputable brands. According to reports cited by Abdelkader, manufacturers have recalled hundreds of thousands of units due to defects, often linked to the quality of downstream suppliers.
Beyond immediate safety, there is a significant environmental cost. The production of power banks requires lithium extraction, a process that has caused pollution and conflict with indigenous communities in regions like Chile’s Atacama desert. Furthermore, these devices contribute to the growing global crisis of electronic waste, as they are difficult to recycle effectively.
Mitigating Risks at Home and Abroad
Safety experts advise treating power banks with caution. Always charge these devices on hard, non-flammable surfaces to allow for heat dissipation. If a power bank is dropped or becomes wet, it should be discarded safely at an e-waste recycling center rather than kept in use.
Did you know? The US Federal Aviation Administration (FAA) has documented hundreds of fire and explosion incidents involving lithium batteries and power banks in recent years, proving that these events are not isolated anomalies.
Frequently Asked Questions
- Can I put my power bank in my checked luggage? No. Aviation regulations strictly require power banks to be carried in the cabin to ensure crew can monitor for potential fire hazards.
- How many power banks am I allowed to carry? Most airlines limit passengers to two power banks per person. Always check your specific airline’s policy before flying.
- Why do power banks explode? They can enter “thermal runaway” due to manufacturing defects, physical damage, or exposure to extreme heat, causing the battery to overheat and ignite.
- Is it safe to charge a power bank overnight? It is recommended to charge devices on hard, non-flammable surfaces and avoid leaving them plugged in while unattended.
Have you had trouble navigating battery safety rules at the airport? Share your experience in the comments below or subscribe to our newsletter for more travel safety tips.
