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Cake day: October 6th, 2023

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  • I think these have basically always been carbon-zinc, or alkaline.

    Technically, zinc is a heavy metal, but basically harmless to humans unless you eat the whole thing. Alkaline batteries contain managous oxide, which is a heavy metal, but you’d need some serious chronic exposure to get into trouble from that.

    It’s still a good idea not to open random crap that washes ashore, because there are definitely FAR more dangerous things that come in small metal cylinders. Like unexploded ordnance.