A China Southern Boeing 737-700, registration B-5252 performing flight CZ6099 from Nanning (China) to Bangkok (Thailand), was enroute at FL320 about 30 minutes into the flight when a passenger's battery pack overheated and burst into flames. Cabin crew quickly extinguished the fire, cooled the device down and put it into a safe container.

The flight crew assessed, that it was safe to continue the flight to Bangkok, where the aircraft landed safely about 2 hours after departure.