https://devzone.nordicsemi.com/f/nordic-q-a/7245/nrf51822-power-on-sleep-modeHi everyone: I have some question about nrf51822 power on sleep mode in example ble_app_hrs have a &quot;power_manage&quot; function and it will make the system go into power on sleep mode,but I observed the current it still have 10mA to run ,so it isn&#39;ten-USTelligent Community 13Tue, 26 May 2015 15:19:55 GMThttps://devzone.nordicsemi.com/thread/25619?ContentTypeID=1Tue, 26 May 2015 15:19:55 GMT137ad170-7792-4731-bb38-c0d22fbe4515:99f20f2d-c820-4227-b5d2-c9732bcf6432Stefan Birnir Sverrisson<p>Hi Peter</p> <ol> <li> <p>First of all, take a look at the <a href="https://devzone.nordicsemi.com/question/5186/how-to-minimize-current-consumption-for-ble-application-on-nrf51822/#reply-5187">current consumption guide</a> if you have not already. 10mA is a bit high, but that might be the average current consumption if you have short connection interval and have a lot of data to send over the air. Look in the current consumption guide how to tune the connection parameters for better current consumption. Also, specifically look at the troubleshooting section, if you are still seeing excessive current consumption with a standard example (see the Measure Current Consumption section in the current consumption guide)</p> </li> <li> <p>Yes, you can. You can be in either System On or System Off mode, see the current consumption guide</p> </li> </ol><div style="clear:both;"></div>