I've yet to find a good reason to have a LiPo bag.
Yeah I’d like to see a test like that as well. Though...not from some YouTube tot Just wondering if it’s a bad idea.IMHO, I concur. With the size of the Mavic 2 battery, a bag is not going to do much to contain the heat produced if it starts burning. And, if they are in a confined space, like a case or a backpack, everything around it is going up as well. There is a lot of energy in one battery and we generally carry 3 or more with us.
YMMV of course but I would be interested in any tests that show a ~60Wh battery on fire and if a bag could contain it while it's inside a case.
Why bother? They don't do anything, theres no proof they do anything and for travel, no airline on the planet asks for them.