Alexandre Beaudoin Bonotto Blog's
Monday, 15 October 2018
Solar-powered buzzer soaks up the sun, charges your doorbell - CNET
The Soliom Video Doorbell has a built-in solar panel so you don't have to hardwire it.
from
https://www.cnet.com/pictures/solar-powered-buzzer-soaks-up-the-sun-charges-your-doorbell/#ftag=CADa08b18a
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