Heat basically. When you push a high current into a battery, charging it, some of that will turn into heat. And enough heat will pretty much cause the battery to boil and the expanding gases causes it to burst open. A high discharge will do the same.
Hooking the battery cables up incorrectly. Reversing the polarity can cause the battery to explode.
No, it will not explode.
Yes, it very well may explode.
If you reverse the battery cables, yes the battery can possibly explode.
Yes it could over heat and explode. Don't do it.
They will not explode. They can however burst.
The battery will explode.
If you explode you die and the same applies to a car battery.
Yes, a car battery can explode if jumped improperly. Car batteries contain sulfuric acid that can produce gasses. If a spark ignites the gases the battery can explode like a bomb.
Yes
It can explode.
Yes, if you short the battery out it can explode and burn you.