https://devzone.nordicsemi.com/f/nordic-q-a/43313/nrf52840-too-much-consumptionI have a custom board with nrf52840 with cr2477 battery (1Ah capacity). I was download firmware to board and after a week the battery voltage dropped to critical. In the firmware forcibly turned on dcdc and in power_manage added: sd_power_mode_set(NRF_POWER_MODE_LOWPWRen-USTelligent Community 13Mon, 04 Feb 2019 12:46:42 GMThttps://devzone.nordicsemi.com/thread/169294?ContentTypeID=1Mon, 04 Feb 2019 12:46:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8ff1d894-5413-4bb6-bebd-9ddbd7ed9583bjorn-spockeli<p>HI Ivanov,&nbsp;</p> <p>this is a duplicate of&nbsp;<a href="https://devzone.nordicsemi.com/support-private/support/221986">https://devzone.nordicsemi.com/support-private/support/221986</a>, hence I will close this and out an answer in the first question.&nbsp;</p> <p>Best regards<br />Bjørn</p><div style="clear:both;"></div>