Check my description in the video.All links are there.
I'm not trying to put a damper on this thread, but almost every and all fires in Lithium Ion batteries occur while the battery is in a constrained case. Such as a computer or an phone.
There has not been a single reported case of a Lithium fire battery from a drone that is being charged in an external charge catching fire. Indeed, the design of the drone makes this impossible.
Also, there is not a single reported case of a lithium battery catching fire outside of the device while being externally charged.
So, you thread is nice. However, this appears to be a solution to a non existent problem.
The concern with loose batteries is a metal that touches the contacts causing a current flow. This is impossible with the Drone batteries.
Also, puncture of the casing is a concern, but would be an almost impossible event in a drone battery without complete battery failure.
External Lithium ion batteries in storage, as used in the DJI drones, have not now or ever to have been reported to combust. The described mechanism of combustion appears to be impossible with these batteries short of an purposeful attempt to cause casing damage and initiate a current flow.
If you have information to the contrary, I stand corrected.