https://devzone.nordicsemi.com/f/nordic-q-a/47175/power-consumption-of-dfu-at-start-and-end-of-uploadDear Nordic Team, We are building a very low power wearable with the nRF52810, only powered by a small solar cell and a super-capacitor. We would like to offer firmware updates for our product, but unfortunately a long and high-power spike at theen-USTelligent Community 13Mon, 13 May 2019 11:44:10 GMThttps://devzone.nordicsemi.com/thread/186678?ContentTypeID=1Mon, 13 May 2019 11:44:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:cd94b955-a271-4b49-9efd-5e73ef5c310aSimonr<p>Hi Thomas</p> <p>This seems like rather normal currents for a DFU update, and your options are rather limited I&#39;m afraid. What&#39;s causing these currents are decryption/encryption, as well as hash validation of firmware and flash write in the end. What you could do is remove all security from the DFU update, as this is what draws the bulk of the current here, but I&#39;m guessing that&#39;s not a viable solution.</p> <p>Alternatively, you will have to find a peripheral chip that is able to do this in HW for less overall current consumption, for this I don&#39;t have any suggestions sadly.</p> <p>Best regards,</p> <p>Simon</p><div style="clear:both;"></div>