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Battery life measurement

I have custom board  with nrf 52832. I am using SDK 15.2.0  and softdevice s132 V6.1.0  to transmit advertising packets periodically. I have written simple application that reads battery status and transmitted it in manufacturing data  of advertising packet  To calculate battery life  for custom board I have used advertising interval 20 ms and took readings everyday .  I used CR2032 battery for measurement. With this approach I have got battery life 13 days.  By doing some mathematical calculation  for 1 sec  I got battery life 21 months.   so I am not sure by this approach I get correct battery life for 1 second. kindly suggest remarks on this. These remarks will be valuable for me.

Thanks in Advance.

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  • Thanks. But I don't have any information about what else your application is doing, or if something else is drawing current. 

    I suggest that you enter the parameters above in the Online Power Profiler that I linked to in my previous answer. 
    See what the expected current consumption is, and compare it to the current consumption your are seeing on your device. If they don't match, there might be something that is initialized in your application that is drawing power, i.e the ADC or something similar. 

    Best regards, 
    Joakim

  • By referring above link  I got average current 20 microAmp for following configuration.

    Tx Power = 0 dBm

    Tx Payload = 27 bytes

    BLE Interval = 1000 msec

    DCDC = No.

    By using 20 microAmp,  I got Battery life approximately 12 months  Also I got  average current on PPK  which are  different from above calculation.. I have captured 2 images with different average current. I am little bit confused which value i will consider for calculation.

    a)

    b)

     

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