A power bank explosion aboard Air China flight CA139 forced the aircraft to make an emergency landing in Shanghai.
Aviation Safety and Lithium Batteries
The power bank exploded in the overhead locker containing carry-on baggage during a flight from Hangzhou to Seoul. The crew reacted instantly, and the passengers suffered no injuries, although the atmosphere was tense, much like during an unexpected car breakdown on the road.
Timeline of the Air China CA139 Incident
- The flight was operated by an Airbus A321-232.
- The source of the fire was a lithium battery, most likely from a power bank in carry-on baggage.
- After the explosion, flames and thick smoke appeared, which the crew quickly brought under control using fire extinguishers and emergency procedures.
- The decision to make an emergency landing was taken immediately, and the aircraft safely reached Shanghai.
- Air China sent another aircraft to continue the passengers’ journey.
Why Are Lithium Batteries Dangerous?
Lithium-ion batteries, found in power banks, smartphones and laptops, can undergo so-called „thermal runaway” – a sudden rise in temperature that causes them to ignite or explode. High temperature and short circuits are the most common causes of such incidents. Similar situations to the one on Air China CA139 have already occurred in other countries – in 2025 alone, more than 120 power bank explosions were recorded in Japan.
Safety on Board
Chinese and global airlines are taking an increasingly strict approach to the carriage of electronics with lithium batteries. In China, batteries must carry the „3C” safety certification, while in Japan the „PSE” mark is used. A growing number of carriers are introducing limits on power bank capacity and recommend carrying them only in carry-on baggage.
Recommendations for Passengers
- Carry only certified power banks (e.g. „3C” in Asia).
- Avoid cheap, unknown brands.
- Do not leave power banks connected to devices during a flight.
- Check whether the equipment shows signs of overheating or bulging.
- Always keep batteries in a visible and easily accessible place.
Technology – what is changing in the world of batteries?
Companies are deploying new technologies that eliminate the risk of explosion – for example, semi-solid-state battery cells and penetration tests that demonstrate high resistance to failure. Despite progress, users should treat power banks as a potential source of danger – just as faulty cables at home should never be ignored.
Flying Safely, but Awareness Is Growing
The power bank explosion aboard Air China CA139 did not end in tragedy, but it is a reminder that new technologies demand responsibility. It is worth taking care of equipment quality and following recommendations, so that you can travel without stress or risk and protect yourself and other passengers.
