Some FAA movie about laptop battery fires. When you see how difficult it is to just cool it down you get an idea that to deal with lithium battery cargo fires is next to impossible in flight. Just scary. How about iPads and all that EFB stuff inside the cockpit?
How about some fireproof insulated bag with a fire suppression system inside to put burning stuff in and contain the gases? (for just a single burning laptop)
https://www.youtube.com/watch?v=vS6KA_Si-m8