Originally Posted by Busty2

Do you remember the flat flexible battery that powered the Polaroid camera? They had some amazing uses. I started a car with one on a cold winter morning in London and if you folded one in half and touched the two contacts together it could be used as a hand warmer (not recommended as they can catch fire) I always thought they should have manufactured batteries for other uses as these were years ahead of anything available at the time. Huge amperage at 12 volts.