https://devzone.nordicsemi.com/f/nordic-q-a/15197/low-frequency-calibration-intervalHi, I have read the following posts and understand how low clock frequency mode can be selected devzone.nordicsemi.com/.../ I&#39;ve also read in many posts that 4s calibration interval is fine for most case What parameter/use case have impacten-USTelligent Community 13Tue, 19 Jul 2016 07:32:24 GMThttps://devzone.nordicsemi.com/thread/58013?ContentTypeID=1Tue, 19 Jul 2016 07:32:24 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f8235742-1c5b-4f24-ae38-063515349c6a&#216;yvind Karlsen<p>Hi,</p> <p>Please see Stians more <a href="https://devzone.nordicsemi.com/question/81847/how-much-current-consumption-when-we-use-internal-32k-rc/">in depth answer</a> on the calibration interval. The LFRC when calibrated runs at +/- 250 ppm.</p> <p>What calibration in SDK 9 and 10 are you referring to?</p> <p>RC clock calibration is implemented by the SoftDevice and is not experimental, it is required to make the chip work without a separate LF crystal in BLE mode.</p> <p>Best regards,</p> <p>Øyvind</p><div style="clear:both;"></div>