I just saw a report on TV about how a 9 volt battery can easily start a fire. I'm like, yeah right. So I did a little research and HOLY FLAMETHROWER, BATMAN! It's true. There are hundreds of videos on youtube showing how easy it is to start a fire with a battery, in just seconds. I'll tell you this, I won't have random 9v batteries just laying around in a junk drawer anymore after watching this: