this post was submitted on 23 Nov 2023
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I can't imagine that the relatively tiny amount of zinc in a flashlight battery would have any affect on the soot from a fireplace. As for the colors, it will totally do that, although you can also buy the little packs they make to throw in campfires if you want to avoid giving yourself cancer.
I’m not convinced those don’t give you cancer too
I'd give it a maybe. If we're talking about pure metallic colors like when you burn copper its green, probably safe. But anything can come with additives including Lead or other heavy metals.
CNN: Illegal Fireworks Can Emit Dangerous Toxins
I mean don't huff the smoke, for starters
But that’s how you get the reeeeally fun colours!
The first flashlight batteries were entirely zinc casings because it was the negative electrode.
They had a carbon rod (anode) and manganese oxide wrapper and were filled with ammonium chloride electrolyte.
Burning the ammonium chloride might have been the most dangerous part, not sure if that could release chlorine gas or not, but probably not with most fires.
Zinc fumes alone are pretty terrible to breath though. Welders can get sick for a couple days if they weld galvanized steel without cleaning it well. Supposedly drinking milk helps the symptoms, but I’ve avoided it so far.
several grams isnt tiny amount. zinc is, like it or not, a toxic heavy metal, sure, not as toxic as cadmium or thallium, but it can and will fuck up several things if released
and then you have batteries containing nickel, mercury, cadmium, lithium, lead,
Oh sure, I wasn't implying it would be safe, just that a few grams of it isn't gonna do jack shit to prevent soot buildup like the image implies.
I don’t know much about batteries, but by a relatively tiny amount, are you talking about today’s batteries or those from 100+ years ago when this tip was published?
Those would have been D batteries, most likely. I also don’t know how much zinc was in those, how much zinc is too much to burn, or if the composition of batteries was the same then as now. Rather curious about all this. Also I was taught batteries can explode in fire – was that a myth? Any battery experts in the chat?
As far as I can tell, the zinc itself wouldn't be particularly harmful (at least, not moreso than inhaling any other metal vapors). The nasty stuff would be manganese dioxide, which is a main component in zinc-carbon, zinc-chloride, and alkaline batteries. Generally, non-rechargable batteries won't "explode" in a fire, but they will puncture and leak chemicals everywhere, which isn't great. Lithium batteries, on the other hand, will absolutely explode and should be kept far away from anything that could damage them.