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Shining a light behind this metal credit card.
(thelemmy.club)
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this post was submitted on 15 May 2026
189 points (99.0% liked)
Mildly Interesting
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This is for strictly mildly interesting material. If it's too interesting, it doesn't belong. If it's not interesting, it doesn't belong.
This is obviously an objective criteria, so the mods are always right. Or maybe mildly right? Ahh.. what do we know?
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I thought so at first, but since this card is metal I’m assuming it has something to do with adding the chip during manufacturing.
Edit: from the other comment, it likely breaks up continuity of the metal card so NFC energy flows into the antenna instead of being absorbed by the metal card itself