Nowhere in the article is there an indication that the user pierced the battery. It's more likely that the breach was from inside, via extreme pressure. In any

Nowhere in the article is there an indication that the user pierced the battery. It's more likely that the breach was from inside, via extreme pressure. In any case, it's reasonable for someone to be bothered at being burned by their headphones and certainly not something to be expected, as you imply.