https://endless-sphere.com/forums/viewtopic.php?f=1&t=87975
There is the thread on my fire. My best guess, and I do mean guess, is that deep discharge pushed a cell into an internal short condition, then when charging, AW hits it on the head, the shorted cell gets nice and hot since its paralleled to the others, and discharges all of them to the point of starting a thermal run away. the fire happened just about when the pack got full. Relatively slow charge, 5 amps for 20 ah pack.
So while I totally agree with Luke about the cause of most fires,, I just had to be the lucky one. There could have been physical damage to my pack, but I have no way to know it, and no reason to suspect it, unlike the hoverboards that get thrown against the wall as the rider learns to use it.
I still believe most of you are safe, like I said, I just got to be the lucky one to hit the incredible high odds. But you are not safe, if you carry the battery unprotected, like I suspect this guy did. I'm betting on the duct tape in his case. I'm thinking he did something that caused a short, or perhaps the pack was built cheap, and could easily short at the + terminals to the - case. That also, could have been the case with my pack. But because it blew on charging, I tend to suspect internal short caused the cascade of events that led to a fire.