Welcome to INTEL forum. Based on my understanding, most dev kit using (Energizer 357-303HVZ Lithium coin battery) https://data.energizer.com/pdfs/357-303ZB.pdf
You should be able to find the existing battery full part number (to clarify the spec) from dev kit BOM list. Example below is the BOM list path from dev kit installer
We have not heard from you and I hope all is well. I will now transition this thread to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread. Thank you.