What's the amp pull of that beast?
Did it stress the batteries max current ability (aka make them run hot), or did the light just get too hot because it was burning like the sun?
I read that as the light body became like a clothes drier and shrink the wrappers.
Its not a cardigan, but close enough…
looks like it became a portable cooking stove. 
im supprised the light is ok and none of the wires insulation didn’t melt and short out.
Yep just the body got so hot that it melted the shrink wrap. Probably helped by the fact that these batteries have a slight slit on them where they came out of battery packs. So the heat could work easily on them I guess. The other two batteries were fine and when I took them out they were not even super hot.
I’m guessing that each emitter is getting about three amps.
That’s probably what happened - the extra heat shrinks the wrap further to ripping point.
I did this a few times, ran my unmodded SRK high till battery went dead. But I encountered no problems, never seen this happened before. The temp must be quite high on your hot-rod. Running that hot can’t be good for the battery health .
I use the high as a turbo mode and not usually room lighting but it does do a good job. Plus it’s been below zero at night around here and I like a good hand warmer. 
My son do the same thing to my Convoy L4 yesterday during blackout and when he gave it back to me it was really really hot when i touch it. Guess i need to check the battery now 
Get the wife a maglite
i was afraid to read what had happened when i clicked on this thread. im glad its more of good news and not anything crazy.
awesome light again btw
You know I think I heard of a light with the turbo mode hidden. Starting to think that might not be a bad idea if lights are gonna be accessible to normms or darks or whatever is the correct short hand for non-flashaholics.
It would be a good idea for many, especially kids. Although most kids would probably figure out how to get it on turbo faster than me.