Hi. The last time I bought a switch it was somewhere around 10 years ago, now I want to buy one from the same company but I'm puzzled by the battery power in the description, my old switches from this company don't have any batteries, what is the battery for?

Since there is a radio module in it (433MHz), this means that a power supply, for example from a battery, is necessary for operation. That is, to answer your question directly - the battery is used to power the communication module.

They don't make any other single channel ones now, just with a battery? I'm looking for a single channel and all I see are with this battery.

I wonder how long this CR2032 will last. Since it can be overridden remotely, I guess the RF module must be active all the time and listening to what's going on in the circle?

@Karachan There is just a lot of negative feedback about the battery dying quickly. I have two Smart Sonoff switches at home bought 10 years ago and they didn't have this battery. Also from what I've noticed they used this battery for the single channel ones in the two channel ones they don't have it anymore.

Battery-powered switch - what is the battery used for in modern switches?

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#1 21836326 12 Feb 2026 02:40

konsum konsum

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21836326 12 Feb 2026 02:40

Hi.
The last time I bought a switch it was somewhere around 10 years ago, now I want to buy one from the same company but I'm puzzled by the battery power in the description, my old switches from this company don't have any batteries, what is the battery for?

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#2 21836328 12 Feb 2026 02:53

Mobali Mobali

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21836328 12 Feb 2026 02:53

Since there is a radio module in it (433MHz), this means that a power supply, for example from a battery, is necessary for operation. That is, to answer your question directly - the battery is used to power the communication module.

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#3 21836329 12 Feb 2026 03:10

konsum konsum

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21836329 12 Feb 2026 03:10

They don't make any other single channel ones now, just with a battery?
I'm looking for a single channel and all I see are with this battery.
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#4 21836356 12 Feb 2026 06:37

Karaczan Karaczan

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21836356 12 Feb 2026 06:37

I wonder how long this CR2032 will last.
Since it can be overridden remotely, I guess the RF module must be active all the time and listening to what's going on in the circle?
#5 21836359 12 Feb 2026 06:48

konsum konsum

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21836359 12 Feb 2026 06:48

@Karachan
There is just a lot of negative feedback about the battery dying quickly.
I have two Smart Sonoff switches at home bought 10 years ago and they didn't have this battery.
Also from what I've noticed they used this battery for the single channel ones in the two channel ones they don't have it anymore.
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