Node reports NVRAM battery power fault while booting

Applies to

• Fabric Attached Storage (FAS) systems
• All Flash FAS (AFF) systems

Issue

Node reports the following warning message while booting up:

WARNING:  The battery is experiencing a critical failure:
           - Battery power fault
          Without a working battery, the system cannot retain data
          during a power outage, which can result in data loss.
          Power down the system and verify that the battery is
          properly installed.
          To ignore this failure and boot the system in a mode
          where data loss might occur, press 'c' followed by 'Enter'

CAUTION: Using this appliance without NVRAM
         battery backup coupled with a power
         failure condition CAN CAUSE DATA LOSS.
Are you sure you want to continue (y or n)? 

or

HA Group Notification (BATTERY (fault)) CRITICAL