Depends on whether Bose engineers were unaware of risks of lithium batteries to the extent that they didn't put any warnings on the product, safe from a recommendation to "remove" the headphones if the user experiences a "warming sensation".

Could it be the case that Bose thought that "warming sensation" is the worst that could happen? Let's see what the comments here say!

>In the end you're carrying a high energy density power source on your head that would love to just catch fire. Don't they teach kids anything in chemistry these days?

>I mean I’m glad it didn’t happen to me, but a billion people are carrying around billions of Lithium-ion batteries. Those batteries sometimes catch fire because Lithium is highly flammable. It’s gonna happen.

>Nothing is perfectly safe, that is how lithium batteries fail. You should know so you can properly deal with problems.

>Well, at lease EVs are spontaneously catching fire.

>Everyone is aware of the risks, there were a bunch of stories about airplane cell phone fires a few years ago.

>lithium battery fires are really nasty, and that's why he got a chemical burn. LiPF6 is a contact irritant, PF5 it decomposes to is a gas, and also a respiratory irritant, and HF PH5 decomposes in the air is a dangerous poisonous acid. This is what everybody visiting a lithium battery factory is told on safety orientation. In case there is fire in the factory, run, preferably until you are few blocks away.

I don't even know what to think. I guess they just didn't know.