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Here's a picture of what happens if a button battery is left for a couple of hours in a sausage: http://www.goodtoknow.co.uk/family/543180/kylie-andrews-face...

Ugh! Jesus christ, I knew they tasted bad, but aside from tasting just like 9 volt batteries, I figured that was the limit of their unpleasantness.

Also, the clickbait advertising on that site is just plain weird.

"Button battery" summons up a fairly familiar image for most US-based readers. Here's a picture for you:

Some people would call it a 'watch battery' too.

Every one of my electronics catalogs calls them coin-cells.

Yes but people are funny animals most people call a computer monitor a "TV" and anything else connected to the computer the "hard drive".

Those look like standard cr2032 cells. I was thinking of the tiny zinc air size 5, 312, etc cells.

(None of these are batteries unless installed in a multi cell battery...)