https://devzone.nordicsemi.com/f/nordic-q-a/69756/nrf52810-ain4-pin-battery-levelHi, I&#39;m using nRF52810. And i&#39;m trying to measure battery level using saadc. The problem is saadc result is not accuracy. When battery voltage is 3.3v, saadc value is 0x0D4 ~ 0x200. When battery voltage is 4.2v, saadc value is also 0x0D2 ~ 0x212en-USTelligent Community 13Tue, 22 Dec 2020 01:35:13 GMThttps://devzone.nordicsemi.com/thread/286188?ContentTypeID=1Tue, 22 Dec 2020 01:35:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6cce7dfd-19f7-4bd5-b460-103cf339e16dYoungjun<p>Hi,&nbsp;</p> <p>I changed resistor value to 390k ohm /390k ohm, and TACQ to 40us.</p> <p>But, it&#39;s not work like 806k ohm / 806k ohm.</p> <p></p> <p>And, I changed resistor value to 200k ohm / 200k ohm.</p> <p><span>Now adc works properly.</span></p> <p><span>Thanks.</span></p> <p></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/286073?ContentTypeID=1Mon, 21 Dec 2020 14:11:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d6b8c762-6b4f-4d94-9556-430a9df48767Stian R&#248;ed Hafskjold<p>Hi, can you please check out this post and see if you follow all the guidelines and comments:</p> <p><a href="https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/measuring-lithium-battery-voltage-with-nrf52">https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/measuring-lithium-battery-voltage-with-nrf52</a> </p> <p>Can you try to use a lower value on the voltage divider resistors, just to see if the error is due to measurement inaccuracy or a software bug?</p><div style="clear:both;"></div>