nRF52 battery life estimation

[@nj@ly]

Hi, I want to estimate the battery life of my nRF52 device operating on a battery of capacity 800mAh. Device will advertise once in every 10sec with an advertising interval of 125ms and timeout of 1 sec. A BLE scanner device will get connected to it and read the battery level as notification. Once the scanner reads the battery level it get disconnect to the advetiser. Minimum connection interval is 7.5 ms and maximum connection interval is 30ms. I would like to know how long the battery of the advertiser can withstand.

Waiting for a reply.

[endnode]

It will be something between 10 days and 10 years. It so much depends on how well you design the HW and how you will write the software that these back of the envelope estimations are almost useless. My two cents, sorry if you expected something better.

[endnode]

In other words if this is really critical business decision for you then invest few days to it, forget about any theoretical math, buy Dev Kit (and maybe also Power Profiler Kit unless you know better how to measure power consumption), write simple FW which simulates the use case and measure it. That will give you confidence of several levels above whatever number people paste you here on open forum. Definitely worth these few weeks of work (from my perspective).

[Bjørn Kvaale]

I agree with endnode that measuring the current practically will give you a more accurate answer than theoretical calculations. If you are still very interested in doing theoretical calculations, you could take a look at this case. Also, Nordic has an online Power Profiling Kit that might prove useful. If you google "estimating current consumption nordic devzone", you will find a lot of cases related to current estimation, which you could then use to estimate battery life.