📷 Image: Wikimedia Commons / Dinkun Chen
Science
Why Power Banks Catch Fire at 35,000 Feet: The Science Behind In-Flight Hazards
✍️ India Today
🗓 14 Oct 2026, 08:37 AM
👁 9
Experts explain the scientific reasons why power banks pose a fire risk during flights at high altitudes.
The safety of electronic devices during air travel has come under scrutiny, with particular focus on the risks associated with power banks. While these portable chargers are common carry-on items, their behavior at cruising altitudes presents unique challenges for aviation safety.
The primary concern lies in the chemical composition of lithium-ion batteries, which are standard in most power banks. At altitudes of approximately 35,000 feet, the cabin pressure is lower than at sea level. This environmental change can affect the internal chemistry of the battery, potentially leading to instability if the device is damaged or defective.
When a lithium-ion battery experiences thermal runaway, it releases heat and flammable gases. In the confined space of an aircraft cabin, this reaction can escalate rapidly. The reduced pressure at high altitude may exacerbate the release of these gases, increasing the likelihood of ignition compared to ground-level conditions.
Aviation authorities and manufacturers continue to monitor these incidents to refine safety guidelines. Passengers are advised to ensure their power banks are certified, undamaged, and used in accordance with airline regulations to minimize potential risks during flight.
The primary concern lies in the chemical composition of lithium-ion batteries, which are standard in most power banks. At altitudes of approximately 35,000 feet, the cabin pressure is lower than at sea level. This environmental change can affect the internal chemistry of the battery, potentially leading to instability if the device is damaged or defective.
When a lithium-ion battery experiences thermal runaway, it releases heat and flammable gases. In the confined space of an aircraft cabin, this reaction can escalate rapidly. The reduced pressure at high altitude may exacerbate the release of these gases, increasing the likelihood of ignition compared to ground-level conditions.
Aviation authorities and manufacturers continue to monitor these incidents to refine safety guidelines. Passengers are advised to ensure their power banks are certified, undamaged, and used in accordance with airline regulations to minimize potential risks during flight.