https://devzone.nordicsemi.com/f/nordic-q-a/78793/nrf52840-high-current-about-2-5ua-while-idleI&#39;m developing a beacon-like product using an nrf52840 with S140 on CR2032 battery. In PS under sleep current draw, it list 0.97uA for system ON, RAM retention OFF. I&#39;m trying to get this number using BMD-340 evaluation board, but unable to get the currenten-USTelligent Community 13Mon, 23 Aug 2021 12:02:19 GMThttps://devzone.nordicsemi.com/thread/326181?ContentTypeID=1Mon, 23 Aug 2021 12:02:19 GMT137ad170-7792-4731-bb38-c0d22fbe4515:beee276c-77f4-48d0-8e92-486faa13e6daSigurd<p>I think RTC itself should be around 0.1µA. Then I believe you have RAM retention for the RAM the SoftDevice uses as well.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/326014?ContentTypeID=1Fri, 20 Aug 2021 15:39:22 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3f6e9891-65b5-4413-9ebc-56539a8445e2Kenneth<p>Hi Sigurd,</p> <p>I&#39;m using external crystal for LF clock.&nbsp; It should only add 0.23uA.&nbsp; Even with 1.9uA - 0.23uA, it still doesn&#39;t get as low as 0.97.</p> <p><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/pastedimage1629473956955v1.png" alt=" " /></p> <p>Do RTC0 draw more current than 0.23uA when it&#39;s running as well?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/325951?ContentTypeID=1Fri, 20 Aug 2021 12:11:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:901c803c-3215-4329-89a3-10eaf32c4130Sigurd<p>Hi,</p> [quote user=""]I&#39;m not sure if I&#39;m missing something.&nbsp;[/quote] <p>&nbsp;The Softdevice requires the LF clock(internal LFRC run current will be higher than LFXO clock source) + RTC0 to be running.</p><div style="clear:both;"></div>