https://devzone.nordicsemi.com/f/nordic-q-a/75823/charging-thingy91-battery-through-pmicHi Dev team, I was looking through the documentation of PMIC from the Thingy91 User Guide and I saw that the PMIC in Thingy91 can be used for battery charging (&quot; The PMIC includes a battery charger &quot; ). I wanted to know this could be implemented anden-USTelligent Community 13Tue, 01 Jun 2021 08:14:26 GMThttps://devzone.nordicsemi.com/thread/312774?ContentTypeID=1Tue, 01 Jun 2021 08:14:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f280279e-0063-4e09-af3e-a8ba1d7e5c87&#216;yvind<p>Hi Adeel,&nbsp;</p> <p>I&#39;m not sure I understand your question. The <a href="https://infocenter.nordicsemi.com/topic/ug_thingy91/UG/thingy91/hw_description/power_supply.html">Thingy:91 documentation, under chapter Power Supply</a>, states:<br />&quot;<em>The main power source is a rechargeable lithium polymer (Li-Po)&nbsp;battery. The&nbsp;battery&nbsp;has a nominal capacity of 1400 mAh and can be recharged through&nbsp;<a title="An industry standard that establishes specifications for cables and connectors and protocols for connection, communication, and power supply between computers, peripheral devices, and other computers." href="https://infocenter.nordicsemi.com/topic/ug_thingy91/dita_common/glossary/glossary.html#usb"><dfn>Universal Serial Bus (USB)</dfn></a>.</em></p> <p><em>Nordic&nbsp;Thingy:91<span class="emoticon" data-url="https://devzone.nordicsemi.com/cfs-file/__key/system/emoji/2122.svg" title="Tm">&#x2122;</span>&nbsp;has a power switch that physically disconnects the&nbsp;battery&nbsp;and the&nbsp;<a title="An industry standard that establishes specifications for cables and connectors and protocols for connection, communication, and power supply between computers, peripheral devices, and other computers." href="https://infocenter.nordicsemi.com/topic/ug_thingy91/dita_common/glossary/glossary.html#usb"><dfn>USB</dfn></a>&nbsp;power from the rest of the circuits. This switch must be on for Nordic&nbsp;Thingy:91&nbsp;to work and charge the&nbsp;battery. When the power switch is in the OFF position, it activates a circuit that drains the 1.8 V power domain.&quot;</em></p> <p>This means that when you connect the USB cable and power on the board, it will charge the battery while connected. If you disconnect the USB, then the PMIC will supply power from the battery.</p> <p>Kind regards,<br />Øyvind</p><div style="clear:both;"></div>