https://devzone.nordicsemi.com/f/nordic-q-a/62571/nrf51822-adc-check-battery-levelHello, Everyone. I&#39;m developing a beacon to check the battery level. I&#39;m current using nRF51822 SDK11.0.0 Softedevice S130 My inquiry is nRF52 series is supported SAADC to check battery level without physical connection pin, but nRF51en-USTelligent Community 13Mon, 15 Jun 2020 09:11:03 GMThttps://devzone.nordicsemi.com/thread/254925?ContentTypeID=1Mon, 15 Jun 2020 09:11:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:51ede6b0-383d-4d73-8c9d-14bf863daa7bJ&#248;rgen Holmefjord<p>Hi,</p> <p>Yes, this is possible with nRF51 as well. However, the configuration is a bit different than on nRF52. See the lines in <a href="https://github.com/NordicPlayground/nrf51-ADC-examples/blob/master/ble_app_hrs_adc_battery_measurement/main.c#L1046-L1048">this example</a>.</p> <p>Best regards,<br />Jørgen</p><div style="clear:both;"></div>