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

or

System Notification (BATTERY (capacity low)) NOTICE