I would like to point out that...most battery pack builders using the 18650 format are focused on the 3.6V nominal NCA / NCM chemistry. However, the 18650 Format cell is available in the LiFePO4 chemistry which is a nominal 3.2V. So...why is this data useful?
Depending on what you plan to do with a given battery pack, a 12V component replacement might work with a 3S or 4S NCA / NCM chemistry. You must do your home work to research and ensure your building plan is good. However, the 3.2V nominal LiFePO4 chemistry is just about perfect for a 12V replacement when using very common and affordable components.
If I was building a 24V pack, I would not hesitate to use NCA / NCM 18650's in a 7S configuration, and for 48V, many pack builders have achieved good results with 14S 18650's. But for 12V?...4S LiFePO4 is a GREAT option to consider...
https://www.batteryspace.com/A123-Syste ... 00mAh.aspx