B2 on the ZC702 is a 3V cell battery used for the Real Time Clock chip NV storage of time.
This allows the processor to know the time and date if the user writes I2C code to access it.
On some ZC702 kits, this battery B2 was not populated.
If you have received an Zynq-7000 EPP ZC702 Evaluation Kit which is missing battery B2, this kit can be returned for RMA.
To begin the RMA process, please open an RMA Case through the Service Portal:
https://www.xilinx.com/serviceportal.html#serviceportal > including this Answer Record number and a description of the issue.
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