What type of cell how much voltage is in them ? If there's a charge in them they can make fire even in the recycling bin you could put a tail light from a car on there or a headlight in drain them. Or put them in a bucket of water.then salt and that will kill it . But your water will bubble green with brown form on top . This was Harold out but then I think that water is toxic.funny thing is when you put it in the water nothing happens will you put the quarter cup of salt in their things happen fast. Careful. As they are alive.
.
Again what type and how big ?
Who I saw the photo 2.5v is zero I think.