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Battery rate warning (math doesn't make sense)

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  • Battery rate warning (math doesn't make sense)

    SteveMSJ please help me understand the following:
    Click image for larger version

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    Granted those CR123A batteries can be finicky, because it was at 80% on my Vera3, then I removed it, transported it to new location, and a few days later went through the dance of adding it to HS3. In doing so it tried to still contact Vera3 controller and had to remove/re-include it a few times, as well as run multiple tests, and battery got down to 60%, but Lithium cell recovered back to 80% as you can see.

    It was initially orange (if I remember color correct) at 60%, but then became green at 80% again for 2 weeks which is the level it is now.

    However, then all of a sudden now it reports the 10.0% discharge warning, which makes no sense as 20% over 18 days worst-case scenario is still only 1.11% per day.

    Trying to understand

  • #2
    Originally posted by RoChess View Post
    SteveMSJ please help me understand the following:
    Click image for larger version

Name:	Screenshot_2019-09-23 HomeSeer Web Control.png
Views:	44
Size:	18.0 KB
ID:	1328496


    Granted those CR123A batteries can be finicky, because it was at 80% on my Vera3, then I removed it, transported it to new location, and a few days later went through the dance of adding it to HS3. In doing so it tried to still contact Vera3 controller and had to remove/re-include it a few times, as well as run multiple tests, and battery got down to 60%, but Lithium cell recovered back to 80% as you can see.

    It was initially orange (if I remember color correct) at 60%, but then became green at 80% again for 2 weeks which is the level it is now.

    However, then all of a sudden now it reports the 10.0% discharge warning, which makes no sense as 20% over 18 days worst-case scenario is still only 1.11% per day.

    Trying to understand
    I think you will probably find that the device reported 2 readings a short time apart, perhaps only an hour. For example if it reported 81% and then an hour later 80% that would be 1% over 1 hour which is a rate of 24% per day!
    If you have ‘Log to Database’ on so that you can see the history of readings you will see how this figure is calculated.
    You will notice that alerting on discharge rate is turned off by default in the pi because with many devices it is a pretty useless parameter due to their, some what, erratic battery level reporting.
    It can be interesting to record but I wouldn’t set any alerts on it.

    Steve

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    • #3
      Color me purple, I was about to check that setting, and everything was green again, and now it shows:
      Click image for larger version

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      Go figure on Lithium cell recovery.

      I've now disabled "Alert on BatteryHighDischargeRate", and activated "LogToDatabase", and increased value from 100 to 0 per device for unlimited as the SSD has a lot of free storage, unless you advice against it.

      Will have to keep track on history as I'm aware that it can take a long time before you can derive any usable data from battery usage.

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