https://devzone.nordicsemi.com/f/nordic-q-a/93451/nrf-connect-sdk-critical-questions-power-consumption-bare-metalGreetings, We are currently evaluating the nRF Connect SDK in comparison to the nRF5 SDK for our new product (BLE enabled &amp; battery powered) for which low power consumption is a vital and critical issue. We want to have a BLE connected device (withen-USTelligent Community 13Wed, 02 Nov 2022 12:41:35 GMThttps://devzone.nordicsemi.com/thread/393649?ContentTypeID=1Wed, 02 Nov 2022 12:41:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:500b464f-52ae-4b22-a345-f4070c3bfa72Einar Thorsrud<p>Hi <span>Stavros</span>,</p> <p>1. The nRF Connect SDK is built around Zephyr and there is no practical way for using the nRF Connect SDK without Zephyr. However, Zephyr can be quite minimal, and you can for instance build your application using a single thread (though other libraries like the Bluetooth stack&nbsp;will use some threads internally).</p> <p>2. Zephyr adds very little overhead, so you should not expect any practical difference in current consumption between a bare metal application and a Zephyr based applications. (There are of course some instructions run here and there related to the scheduler for instance, but hit is negligible in practice).</p> <p>Einar</p><div style="clear:both;"></div>