On Mon, 19 Feb 2018 17:03:30 -0800, John Robertson
wrote:

I've had 100's of NiCad/NiCd batteries leak on our pinball game boards
since the 1970s. I stored these leakers for many years in a couple of
milk crates (didn't want to simply toss in garbage) until the recycling

Just curious. It sounds like you repair pinball machines. Aside from
playing them when I was a kid, I know little about them. But I did once
see one taken apart, and it appeared to be little more than a
complicated bunch of relays and lights. And they operated from a wall
outlet. I kind of think there was a power transformer inside, so I
assume those relays and lights were low voltage. (probably 6 or 12V).

So, why are there batteries inside of them?