Battery life measurement

[prash4iot]

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.

[prash4iot]

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)