Craftmaster,
no hostility on my part. Just decades of experience in getting people who think they know better to say what they think they know, and comparing the result with what is already out there. It's part of my job.
So far, you're doing much less well than the first two minutes of the FAA video, or the first six pages of the CAA report. They tell me what to do if my laptop (which I often have with me) has a battery fire when I am flying.
You are telling us you doubt all that, but you also say you are "no expert". That information so far does not tell anyone what to do who is experienced a laptop battery fire when flying. Which is the subject of this thread.
When I challenged you explicitly to give better advice, you declined.
This discussion may be a little uncomfortable for you, which I regret, but it does make the situation clear for other readers, namely that you have no useful advice to offer, even when asked explicitly.
PBL