https://devzone.nordicsemi.com/f/nordic-q-a/108712/power-consumption-zephyr-and-timersHi, I have a bigger project with BLE enabled and others, but want to try to get low power in active mode in simplest scenario. If this will going to success then I&#39;ll strugle with my original project. With UART off I see current consumption abouten-USTelligent Community 13Tue, 27 Feb 2024 14:15:57 GMThttps://devzone.nordicsemi.com/thread/471053?ContentTypeID=1Tue, 27 Feb 2024 14:15:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:56867fb8-108a-4e03-8395-31a6e4b5f76fJ&#248;rgen Holmefjord<p>Hi,</p> <p>From your code, it looks like you are running a TIMER instance in timer mode. This requires the HFCLK to be running (the TIMER peripheral will automatically request HFINT from system if HFXO is not started), which has quite high current consumption. We do not have current consumption numbers for this in the product specifications of nRF52832, but you can have a look at the numbers for nRF52833&nbsp;<a title="TIMER running" href="https://infocenter.nordicsemi.com/topic/ps_nrf52833/_tmp/nrf52833/autodita/CURRENT/parameters.i_timer.html?cp=5_1_0_4_1_0_8">TIMER running</a>&nbsp;to get a ballpark number.</p> <p>It looks like you use this timer to generate an interrupt every 1 seconds. If this is the accuracy you require, I would rather recommend you to use the RTC peripheral for this timer, which runs off the 32.768 kHz LFCLK. The run current of the RTC is&nbsp;~2 uA, see&nbsp;<a title=" Current consumption: Ultra-low power " href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/pmu.html?cp=5_2_0_16_0_0_2#unique_205654252">Current consumption: Ultra-low power</a>.</p> <p>The TIMERS in counter mode should have lower current consumption, see <a href="https://devzone.nordicsemi.com/f/nordic-q-a/8979/nrf52-very-low-power-counter/33052">this post</a>.</p> <p>Best regards,<br />Jørgen</p><div style="clear:both;"></div>