THIS DOES'NT MAKE MUCH SENSE
IT IS DOABLE BUT WHY ?


In my case, basically for higher reliability of some electronic gizmos. Also
to have pretty much maintenance free electronic gizmos so far as battery
replacement goes.

I live in a rural area and the electricity goes out at least twice a
month...

And I've had problems with phone answering machines which need to have the
time reset each time the power goes out. Or other models the batteries wear
out quickly during a power outage. So my phone answering machine needs
constant attention!

Then I have about 7 battery operated clocks (due to power outages), 6
battery electronic thermometers for temperature monitoring because I have a
wood stove and want to keep an eye on the temperatures when I am in other
rooms of the house, then about 6 battery smoke detectors / CO detectors
everywhere (again for wood stove monitoring).

Basically I frequently need to replace a battery in something. It would be
nice to have just one central battery and not worry about it except once
every several years!