https://devzone.nordicsemi.com/f/nordic-q-a/35316/nrf52840-4v-useHi nordic I bought the nrf52840 board so I&#39;m developing. I want to use the this kind of LIR2032 coin cell 3.6v ( www.amazon.com/.../B074VX8ZJF ) I measured power of this and it is 4V. I&#39;m going to use this coin battery, Does this cause anyen-USTelligent Community 13Tue, 12 Jun 2018 14:16:41 GMThttps://devzone.nordicsemi.com/thread/135767?ContentTypeID=1Tue, 12 Jun 2018 14:16:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:37bfb8a7-5564-4580-a59a-0ea2f9ac2c2fMartin Lesund<p>Hi Hongpal,</p> <p>&nbsp; The max recommended voltage for the coin cell is 3.6V on VDD.</p> <p>So if you want to use a coin cell battery with a voltage of 4V, you can use VDD_HV.&nbsp;</p> <p>You cannot put the battery in the &quot;battery holder&quot;, you have to use the &quot;LiPo header&quot;.</p> <p><a href="http://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf52%2Fdita%2Fnrf52%2Fdevelopment%2Fnrf52840_pdk%2Fpower_source.html&amp;cp=2_0_3_7_2_3" target="_blank" rel="noopener noreferrer">Read more about Power Source here</a></p><div style="clear:both;"></div>