This is not the same, but Badger will understand. Others of you too... In the army we had a man pack radio, the PRC 77 set which later became the PRC125 set...or the other way round. It used the big square battery which was composed of dozens of smaller batteries resembling AA, C and D cells. All plain and set together they were joined at the ends by a soldered on metal tape. This gave them the power they needed to run the radios. Bring into the equation a very bored 18 year old doing observation post duty in Nicosia Cyprus (1975)...long hours with sometimes not much happening... One day he took one of these batteries and opened it up to see. Then joined up all the connector wires that hooked it into the radio...then set it on the sandbags and stood back to watch the wires glow red... Well a minute or so went by and there were the sound of small caliber gunshots in his (my) location. This is bad...the batteries had started to high order and were blowing the core out like a projectile. I didn't need a firearms simulator, there were lots around. I had to take a broom handle and disarm this thing under fire as the pieces were flying everywhere...it was now glowing. I threw it into the local wrecked buildings and took note not to play with batteries...