83
Found on a beach south of England
(sh.itjust.works)
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.
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.
"Shit, this plastic vessel full of poison ran out... should we take it to shore and dispose of it properly?"
"Heavens no, just throw it directly in the ocean! Out of sight out of mind!"