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A comment on 4.2″ and 7.5″ NFC-powered e-Paper Displays Work without Battery. Parent comment

Re:4.2″ and 7.5″ NFC-powered e-Paper Displays Work without B... by arendtio on Tuesday March 17, 2020 @05:48PM (#22610837)
https://news.ycombinator.com/item?id=22610276
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