We know that you can start a fire with a battery. the better prepared you are the easier it is going to be.
I am not prepared and all I have in my pockets is my car keys, which includes a keyless entry fob that has a '3v Lithium Coin Cell Battery' is it possible to start a fire with this battery? All I have is the metal key ring, finger nail clippers, and a couple of other keys on the ring.
I don't have a tiny screwdriver to get the battery out, so I am going to have to use a rock to break the key fob. I suspect that banging two rocks together would be a more effective fire starter, but I might be wrong.
Can I start a fire with my key fob battery?