Originally Posted by
golfyankeesierra
Hope the Hosties at QF now more about it then Dave here.
Off course for cooling that battery you need liquids but to extinguish the flames first, best is halon.
Halon may or may not be more effective than water in initially knocking back a battery fire. Your link provides no evidence either way.
And since you're going to need water anyway to cool the battery, I'm not about to criticise a F/A who uses it to extinguish the flames.
There is a common misconception (not helped by the FUD spread by some extinguisher manufacturers) that Li-ion battery fires are Class D, where you wouldn't want to use water. That's not the case.