Both. I was just reading a paper on LTO safety today. Different states of charge create varying proportions of volatile materials because of the way they are altered by moving ions. The cells include vinyl esters, etc. to help control dendrite formation and other life-reducing reactions.Is the fireball larger, or does it last longer? From what I understand, the reaction in the battery can only go so fast so it was my understanding that the fireball would just last longer, not be more intense.
Basically, the chemistry changes a lot with state of charge, and all that stored energy ends up as a bigger, badder, longer lasting fireball.