Two people killed in the accident. Seems to be that the battery actually malfunctions prior to the crash and then crashes into a tree. Car is completely engulfed in a battery fire within 3 minutes. Cells scattered around the scene.
This seems absolutely horrific.
I'd imagine it's an issue with the battery chain. They're awesome batteries, but even one failing is pretty catastrophic looking.
I imagine one going off could lead to a chain reaction. No idea the science there though