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Redditor finds heavy block of iron shavings inside cheap PSU, also appears to lack safety protections
(www.tomshardware.com)
This is a most excellent place for technology news and articles.
This has been going on for at least a couple of decades now.
PSU buying advice you'd hear from random PC gamers before the age of having a plethora of engaging-to-watch tech YouTubers really would be "if a power supply is heavy, it's probably good" outside of a slim minority of people who actually regularly read PSU reviews from PC hardware mags and articles.
I've seen a PSU with a straight up thin layer of cement in it, as well as bits of metal stuck to the inside. It's nothing new.
I've given similar advice but it's more "light is likely no good, but don't just trust that it's heavy" as well.
The cement is probably missed with lead to keep the radiation in ;-)