My co-worker gave me a Samsung Note 4 battery to hold today. It was not flat, it was expanding. It was not charging anymore. It is a small battery compared to a car like the Tesla. Imagine the results of a battery failure. You can find battery fires on youtube to see how big even small battery fires are.
True. But i will tell you not all lithium ion chargers are the same or have the exact same software controlling them.
It is more risky to be in a crash with these cars and their batteries because those hot, hot fires are extremely difficult to put out and water will not do it.