A woman on a flight from Beijing to Melbourne told the Australian Transport Safety Bureau (ATSB), that she was sleeping and listening to music about two hours into the flight when she heard an explosion.
She was left with a blackened face and her hand blistered and the headphone battery and case melted to the aircraft floor.
The ATSB did not reveal the brand or model of the headphones, but it appears to be a wireless noise cancelling headphones that uses lithium ion cells.
I have a few noise cancelling headphones for flights, but they all use a single AA Alkaline or NiMH cell, which does not have the explosive capability of li-ion cells. I would be curious to know the model used though.
I have also got a few smaller bluetooth headphones that I've found great for running, but they only last around 4-5 hours of use, so their rechargeable li-ion batteries are quite small. But it would be good to know what caused the failure of the headphone batteries in the above case.