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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 wyager on Wednesday March 18, 2020 @08:37AM (#22615886)
The power density of light is vastly higher than the power density of Wi-Fi almost anywhere. If you can't do it with PV, you definitely can't do it with Wi-Fi.
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