Hey, is that just battery guts between the two CR2s or did you have a spacer in there? Sorry I can't remember if the Grant needs a spacer for 6v or not and it looks like a big mass of stuff between the batteries.
Glad you are OK. Thats scary stuff.
Thanks.
Those are battery gutts, and I might add that when I removed them, there was nothing but an empty round grill...Inside was empty, unlike the upper battery.
Which shows that the upper battery is the one that had the little explosion first and started to emit fumes until it brought the second battery to a temperature so high that it exploded from all its heart with a huge blast and propelled the Grant like a rocket.