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12947 Discussions

Sources for CMOS Battery Assembly for NUC5PPHY


July 3, 2021

Can you tell me where I can purchase the CMOS battery assembly for the NUC5PPYH and for future use in the NUC11TNi3?

This assembly for the NUC5PPYH has these characteristics:

(1) CR2032 coin lithium battery.

(2) An attached twisted pair of wires (red and black for positive and negative, respectively) about 4 centimeters in length.

(3) A connector (Molex 51021-0200) that is wired with the correct polarity.

(4) Electrical insulation around the battery, with an attached double-sided adhesive pad to hold it onto the mainboard.

This general configuration is described for all NUCs on Intel's website here:

Thank you for your help.

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Super User Retired Employee

Amazon has them. Be careful not to grab one designed for Dell systems; they wire it the opposite way.

Here's a 10-pack for only US$8.35:

Hope this helps,



July 3, 2021


Thank you for replying.  I agree that the CMOS batteries wired for the Dell systems appear to have the wrong polarity for the Intel NUCs.  Unfortunately, the Tsorryen A model also appears to have the wrong polarity.  And the pictures of the Tsorryen B model, which show the connector, are not quite clear enough to discern polarity with certainty.  Both models are listed as discontinued on the Amazon web page.  However, I have written to Torrysen to inquire further, so thank you for the lead.  I am most grateful.

Rome Tech has a model specified for Intel NUC and ASUS:

Unfortunately, the little inset pictures of the Rome Tech product show two different products, one which has an Ni-MH battery and the other has a lithium battery.  The one with the lithium battery is in the third small inset picture, with model number RT-CMOS-29  and has the right polarity for the NUC5PPYH.

Thank you again for your help.

Super User Retired Employee

You are welcome.

There are plenty of offers on Amazon for an individual battery. I provided this link for the 10-pack because it costs about the same amount as purchasing 2 individual batteries. I looked closely at the connector and thought that it had the right polarity, but I agree that it is difficult to see. If they are incorrect, you do understand that, with a gentle lift of the tabs (I use tip if exacto knife), you can pop out the pins and swap them in seconds.



Hello RMPowell

Thank you for posting on the Intel️® communities.  

Due to this product being discontinued, Intel Customer Service no longer supports inquiries for it, I am glad to see that fellow community members have the knowledge and they jumped in and helped. You may also find the Discontinued Products website ( website helpful to address your request.  

You can get the specifications and verify this product's discontinuance status at the Intel® Product Specifications website > Product Status > "Discontinued". 

Please keep in mind that this thread will no longer be monitored by Intel. Thank you for your understanding.  


David G  

Intel Customer Support Technician