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2 points

Batteries got good enough and electronics efficient enough that for a doorbell it makes more sense to use a battery than to run a dedicated 12v wire.

My dumb doorbell has a little coin battery.

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4 points

My doorbell generates the necessary electricity when someone pushes the button.

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1 point

Interesting. What kind is that?

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2 points
2 points

A big metal bell on a rope

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4 points

I couldn’t be bothered to regulary take down my doorbell to charge it. I’d probably tell people to just text me, when they’re at the door.

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2 points

I have one, it’s once every 3 months. Mostly it’s about being notified of packages for me, and those guys will absolutely not message me.

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