https://devzone.nordicsemi.com/f/nordic-q-a/35254/battery-issue-on-nrf52840-pdkHi, If I connect supply from laptop using micro USB cable, battery on PDK also gets discharged? Asking this because in the initial stages of testing PDK battery is working. After that I got to use power supply most of the times. I am surprised nowen-USTelligent Community 13Mon, 11 Jun 2018 12:50:08 GMThttps://devzone.nordicsemi.com/thread/135587?ContentTypeID=1Mon, 11 Jun 2018 12:50:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:62e603d8-ad04-4bc0-825c-7046d354113bMartin Lesund<p>Hello&nbsp;Jonnavittula,</p> <p>&nbsp; It is not optimal to have the battery in the board while connected to USB if you want to preserve the batteries life.</p> <p>Because of the diodes in the circuit the board will be powered by the source that has the highest voltage, which can be the battery.</p> <p>Most likely you have powered your board with the battery even if you have been connected with the USB.</p><div style="clear:both;"></div>