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What's an easy way of installing a traditional door bell? I know there are the wireless, battery operated ones, but I'm tired of changing out batteries. Is there a version of doorbell that could just be plugged into a wall outlet, or better yet, NOT use up and outlet but somehow "tap into" a nearby outlet for power?

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I'm not sure there is an "easy" way to install a traditional doorbell since it involves running wires from the button outside the door inside the house to the chime and powering the chime unit. Some wireless doorbells have a plug-in chime unit which should minimize the need for battery changes - the battery in the button only gets used when someone presses it, so you should get years of use out of it before it needs to be changed. –  Johnny Feb 2 at 2:35

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There are a small number of battery free doorbells such as these

doorbell

They work on a signal generated by pressure (piezoelectric?). These are similar to the wireless battery-free switches now showing up for AC fixtures.

 Images and links are for illustration only and not an endorsement of any products or sources
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Interesting product -- have you had any experience with it? The specs seem almost too good to be true, promising to work through walls, doors and floors with a range up to 280 meters. –  Johnny Feb 2 at 3:16
    
@Johnny No experience. The wall switches are from well known providers, such as Lutron and Leviton, but the doorbell is by a newcomer to the US market. Many of the examples on the internet are EU receptacle types. –  bib Feb 2 at 3:22

Installing a conventional doorbell involves fishing low voltage or T-wire from the button and chime to a transformer that is attached to a 120vac power source. This is usually done at a j-box in the basement or some exposed area. The transformer cannot be hidden without access in a wall etc. If you have existing finished walls, there is never an "easy" way to fish these wires through enclosed spaces. I like some of the suggestions in the comment section. A plug in chime and a battery operated button is an excellent option. +1 johnny.

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