One of my hobbies is trying as much possible options to make a fire. Today I made fire with some Steel Wool (Wire Wool) and a 9 Volts battery.
First of all you make sure you’ll have enough tinder. In this case it’s only a demonstration, so I took some cotton. Loosen some steel wool and touch it with the battery. You’re actually short circuiting the battery, that’s where the energy is coming from. You’ll see the steel wool starts to burn. Hold you tinder against it while you are blowing on the burning parts.
Be cautions when putting away the steel wool. Due to the blowing into the steel wool, the fire might have moved into the middle of the steel wool. It can smolder for a long time. So before you throw it away: dip it in a bucket of water. Safety first!