Air China said in a post on Weibo that “a lithium battery in a passenger’s carry-on luggage stored in the overhead compartment spontaneously ignited.”

A packed Air China flight bound for Seoul was forced to make an emergency landing in Shanghai on Saturday after a lithium battery inside a passenger’s carry-on luggage erupted in flames, filling the c...

The Air China flight CA139 from Hangzhou, China, to Seoul, South Korea, was forced to make an emergency landing in Shanghai when the battery “spontaneously combusted” in the cabin on October 18.