Hi Igor,
The battery provides backup power for the real-time (date/time) clock.
To fix the alert,I would recommend you to follow the below action.
Warning
The coin battery is not present, is not properly seated, or has reached end-of-life
The battery provides backup power for the real-time (date/time) clock. In the event of a power failure, the date and time will revert to 1980-01-01 00:00:00.
Recommended actions
•Replace the controller module that logged this event.
Regarding what type of battery used,I am trying to get that information.Since this is an embedded part in the controller I do not have much information on it.
Also we replace the entire controller module for warnings related to coin battery.
You can also check all the events and its description in this guide https://support.hpe.com/hpesc/public/docDisplay?docId=emr_na-c03791995.
Hope this was helpful!
