I have kept a note of when batteries have been changed on each of the EvoHome devices since they were installed in September 2015.
It is quite clear to see that the HR92s which operate frequently use their batteries much quicker than those, for instance in a spare room where the heating may only be on for less than 30 days a year.
I also check the voltages, but until now have not always recorded them. All the replacements have been Duracell Industrial batteries. The voltage on installation, without load, is generally c. 1.6v, warning messages seem to start appearing when the voltage drops below c. 1.2 v, but can be ignored, as the HR92s seem to reset until voltage drops to about c. 1.1.
Shortest times between failures is about 15 months from September one year to December of the next year, longest over 2 years from September one year to October 2 years later.
I can now predict battery life reasonably well, and henceforth will change the batteries of "busy" devices every 12 months, and, in the interest of economy move them to the little used devices where hopefully I'll get another years use from them.
It would be interesting to hear of others experiences.
FB
It is quite clear to see that the HR92s which operate frequently use their batteries much quicker than those, for instance in a spare room where the heating may only be on for less than 30 days a year.
I also check the voltages, but until now have not always recorded them. All the replacements have been Duracell Industrial batteries. The voltage on installation, without load, is generally c. 1.6v, warning messages seem to start appearing when the voltage drops below c. 1.2 v, but can be ignored, as the HR92s seem to reset until voltage drops to about c. 1.1.
Shortest times between failures is about 15 months from September one year to December of the next year, longest over 2 years from September one year to October 2 years later.
I can now predict battery life reasonably well, and henceforth will change the batteries of "busy" devices every 12 months, and, in the interest of economy move them to the little used devices where hopefully I'll get another years use from them.
It would be interesting to hear of others experiences.
FB
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