Battery life measurement

RE: Battery life measurement

prash4iot — Mon, 02 Dec 2019 17:44:40 GMT

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.

RE: Battery life measurement

Joakim Jakobsen — Mon, 02 Dec 2019 13:53:39 GMT

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

RE: Battery life measurement

prash4iot — Mon, 02 Dec 2019 13:40:11 GMT

Configuration as follows.

Battery : CR2032

BLE Interval : 20ms 0r 1 sec

Tx Payload : 20 bytes

Tx Power = 0 dBm

what will be the battery life I will get for above Configuration?

RE: Battery life measurement

Joakim Jakobsen — Mon, 02 Dec 2019 13:31:16 GMT

I'm sorry but without any more information than that, it is impossible for me to determine the battery life.

RE: Battery life measurement

prash4iot — Mon, 02 Dec 2019 12:58:32 GMT

Hi,

Ok.

I am not using dcdc converter. I want to know that whether above approach is correct or not? According to you what wiil be the battery life for simple beacon application with 20 ms or 1 sec.?

RE: Battery life measurement

Joakim Jakobsen — Mon, 02 Dec 2019 12:25:41 GMT

Hi.

I suggest that you take a look at the Online Power Profiler.

"We in the Nordic Support team have created an online power profiler to estimate the power consumption during a BLE event with different parameters. The profiler gives you information about the different components in a BLE event as well as the average current over a specified interval. All data is based on actual measurements conducted on the nRF52.

The BLE event types you can choose between are advertising mode and peripheral connection mode.
You can also choose different values for the following parameters:

Voltage (1.7 to 3.6 volt)
BLE interval (20 to 10240 ms for advertising. 7.5 to 4000 ms for connection)
TX payload (0 to 31 byte for advertising. 0 to 27 byte for connection)
TX power (4, 0, -4, -8, -12, -16, -20, -40 dBm)"

Using the power profiler you can input the parameters you have set in your application to see what the expected current consumption will be.
If or why your application is using too much power is hard to say, because I have no information about your application.

Best regards,
Joakim