https://devzone.nordicsemi.com/f/nordic-q-a/91058/current-consumption-on-nrf52833-is-too-largeHi, I now aply ble_app_uart example for my custom board My board work perfect Some configurations in my code based on ble_app_uart Advertising_interval : 64ms Tx: 0 Some changes compared to original ble_app_uart example I expected current consumptionen-USTelligent Community 13Wed, 17 Aug 2022 20:27:28 GMThttps://devzone.nordicsemi.com/thread/382107?ContentTypeID=1Wed, 17 Aug 2022 20:27:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:65385bb5-ec79-4cca-8bae-af1af1ab2a90Kenneth<p>In cases like this I recommend to go back to either go back to the default example and step through the changes until the current consumption issue occurs, alternatively use the existing project and remove features/modules until the problem goes away. In general you may find this useful:&nbsp;&nbsp;<a href="https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/optimizing-power-on-nrf52-designs">Optimizing Power on nRF52 Designs</a>&nbsp;</p> <p>All that said, there is no known operation of the chip that may draw as high as 20mA, so I suspect it&#39;s something externally that cause this.</p> <p>Kenneth</p><div style="clear:both;"></div>