In article ,
harry wrote:
On Wednesday, 3 January 2018 11:17:35 UTC, Dave Plowman (News) wrote:
In article ,
harry wrote:
Your door bell system with transformer uses a lot of energy.
Low power but on all the time.

And you think battery costs will be less?

The battery is only in use for a few seconds each week.
The transformer is continually drawing current

And how much current do you think it draws?

--
*Everybody lies, but it doesn't matter since nobody listens*

Dave Plowman London SW
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