https://devzone.nordicsemi.com/f/nordic-q-a/83221/nrf52840-poweringHello, We are developing a smart padlock with nRF52840 on Raytac MDBT50Q-1MV2. It will be powered from CR2 type battery. We will support two types of battery chemicals, Lithium-ManganeseDioxide 3V Full - 1,5V depleted Lithium-ThionylChloride 3.67V Fullen-USTelligent Community 13Thu, 30 Dec 2021 11:55:30 GMThttps://devzone.nordicsemi.com/thread/345464?ContentTypeID=1Thu, 30 Dec 2021 11:55:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a6f0a891-f359-49ff-8ff8-dfb64ad7e35eBendik Heiskel<p>Hi,</p> <p>When using VDD above 3.6V the life time will decrease and the performance equal to the spec can not be guaranteed.</p> <p>If both battery types are used then an external regulator would be needed.</p> <p>Lithium-ManganeseDioxide battery can be used with normal voltage mode, with VDD and VDDH shorted together. </p> <p>For the Lithium-ThionylChloride battery you can use high voltage mode, by supplying only VDDH from the battery.</p> <p>Here are the different configurations for the internal regulators:</p> <p><a href="https://infocenter.nordicsemi.com/topic/ps_nrf52840/power.html?cp=4_0_0_4_2_0_3#unique_1591758884">https://infocenter.nordicsemi.com/topic/ps_nrf52840/power.html?cp=4_0_0_4_2_0_3#unique_1591758884</a></p> <p>&nbsp;</p> <p>Best regards,</p> <p>Bendik</p><div style="clear:both;"></div>