Health Check shows Critical State for: Voltage Sensors 'Battery' 1.952 (crit. below 1.976 volts) and SYS-LED is on
SSP S410
The referenced battery is the BIOS battery, whose power has ran down, and would require a replacement.
S410 appliances include a lithium BIOS battery. When replacing the battery, use a Panasonic BR2032 lithium, coin cell battery (3v,190mAh). The customer would procure and replace the battery themselves. Information on this battery can be gotten from the web. See the non-Broadcom link below, as an example.
Panasonic Energy - BR2032:Lithium Batteries
For the SSP S410 part types that Symantec provides replacement, please refer to the snippet below.
For guidance on how to replace this battery, please refer to the steps in the Tech. Doc. with the URL below.
S410 BIOS Battery Replacement Guide
Replacing the battery should clear the critical error reported.