Thought it might be a battery pack at first so I wasn’t going to touch it but it appears to be plastic.

Possibly broken at the top? Unsure.

  • neidu3@sh.itjust.works
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    2 months ago

    Remains of the battery from a lantern/marking buoy. Might contain heavy elements.

    These used to be single use and dropped in the ocean upon replacement. More efficient light bulbs have replaced many with solar cells and wave generators, and better environmental awareness has stopped dumping these in the sea and they’re instead recycled. At least here in Norway.

  • ChaoticNeutralCzech@feddit.org
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    2 months ago

    Looks like a PJ996 lantern battery whose top cover broke off. It’s probably carbon-zinc, in which case you can recover a decently big graphite rod from each cell.