A friend of mine in Nebraska has 35 of these Nickel Cadmium batteries. I took one of them to Denver with me a few weeks ago to see if the yard would take them and they did. So yesterday my buddy brought the remaining 35 of them out and the yard said no, that there was just too many of them. Can anyone inform me on what they might be from and if they are worth anything? Each one weighs 10lbs 10oz. They were all linked together but we broke them down into singles and threes.