That's certainly true but I was mostly meaning to highlight the fact that as these batteries age, and may no longer be suitable for their original purpose, they

That's certainly true but I was mostly meaning to highlight the fact that as these batteries age, and may no longer be suitable for their original purpose, they could still be useful for a whole range of alternative purposes. As the original battery owner I don't intend to get much for selling a used car battery, but it still seems quite cool to have it be repurposed for some other use.