Here is a link to some rather interesting tests done on LFP (Li FePo4) batteries.

https://www.youtube.com/watch?v=zoiBj4_TaeM

These are unlike the LioN cells that readily catch fire but they DO have a higher energy density than the LFP cells have hence their rather wide use in consumer products.

Hmm looks like something has gone silly with my post as the link has vanished. Yet when I get in there its all sitting in the Edit pane ????

For interest here it is again: https://www.youtube.com/watch?v=zoiBj4_TaeM

The LiOn cells have a much higher power density than LiFePo4 type cells which is why they are so widely used in consumer products and the number of household fires over here in WA with the LiOn cells exploding and catching fire is quite alarming.
Some cells have actually gone bang and caught fire and were NOT on charge at the time.

But I guess they may well have been on charge hours before and suffered some internal damage which slowly built upuntil they finally exploded and caught fire.

Some cells have actually gone bang and caught fire and were NOT on charge at the time.

That's a big worry. No wonder they are banned onboard by airlines.

This is where the naming convention can confuse.

All batteries containing lithium are Li-Ion cells. There are different chemistries though.

LiFePO4 is lithium iron phosphate - less energy dense but very safe unless abused deliberately.
LiCoO2 is lithium cobalt oxide - much more energy dense but chemically unstable, including at times without provocation.

Apparently, fast charging, caused the dielectric to crack and metal dendrites to form in them. They short which would explain, spontaneous combustion anytime.

Now what was that funny quote that only an American could think up? Bang = unplanned disassembly.

Or the term I heard the other day:

"cohabitant pachyderm"