https://devzone.nordicsemi.com/f/nordic-q-a/1846/recommend-battery-measuring-methodHi all, From this forum and the examples given in the &quot;sdk&quot; find two approaches to measuring the battery voltage: using external divider 10M/2.2M+22nF using integrated divider 1:3 of VCC. The first method uses additional components and hasen-USTelligent Community 13Tue, 11 Mar 2014 19:58:49 GMThttps://devzone.nordicsemi.com/thread/8002?ContentTypeID=1Tue, 11 Mar 2014 19:58:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d31bad80-b238-4fd6-8d3a-4a234b191457Peter<p>Hi Dan,</p> <p>Your response completely clarifies the problem. Thank you very much for your cooperation.</p> <p>Peter</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/8001?ContentTypeID=1Tue, 11 Mar 2014 15:38:11 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2b3dc48f-1386-4356-b2ed-e4346687eda9Dan Danknick<p>Peter,</p> <p>I believe the 270mV diode compensation is related to the power input structure on the Evaluation Board where USB, coin cell and external Vin all meet up to product Vcc_nRF. Check out Figure 9 in the nRF51822 Evaluation Kit User Guide v1.1.</p> <p>In a custom solution with just the CR2032 you&#39;ll want to set that to zero (or use #ifdef EVBOARD to modify it by project build flags).</p> <p>Dan</p><div style="clear:both;"></div>