https://devzone.nordicsemi.com/f/nordic-q-a/64179/nrf9160-vddI am working on a design that has an nRF9160 being powered by a a 3.6V lithium primary battery. I know nRF9160 VDD is 3.8V(Nom.) Is there any problem in LTE RF performance (TX power ..) even if the 3.6V lithium primary battery is directly connected withouten-USTelligent Community 13Mon, 27 Jul 2020 12:59:51 GMThttps://devzone.nordicsemi.com/thread/261795?ContentTypeID=1Mon, 27 Jul 2020 12:59:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:04d3a0dd-b195-4134-90d9-68eb708e6e6bMartin Lesund<p>Hi,<br />From the <a href="https://infocenter.nordicsemi.com/index.jsp?topic=%2Fps_nrf9160%2Frecommended_op_conditions.html&amp;cp=2_0_0_10" rel="noopener noreferrer" target="_blank">Operation Conditions&nbsp;d</a>ocumentation, we see that RF 3GPP compliance requires 3.3V.&nbsp;<br />That means that&nbsp;<span>RF 3GPP compliance is guaranteed when Vdd is within 3.3V&nbsp;- 5.5V since the&nbsp;radio performance is impacted when Vdd is below 3.3V.<br /></span></p><div style="clear:both;"></div>