1950 Battery Status

Hi - we have a PE1950, approximately 4 years old, with a DRAC5 card installed.  In the DRAC interface, the batteries both show as 'good' (see screengrab).  We also monitor this server with BMC Portal, and that is reporting a battery problem, as per the message below.  Do I have faulty battery, or a spurious error message?

BMC error:

Status: WARNING! (Problem: This battery is degraded. Reported status: Learning)

Status report
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Monitored object: BAT-1 (DELL - Battery 0)
Type: Battery
DeviceID: 1

Parameter: Status (Currently in WARNING state)
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Current value: Degraded
Unit : OK ; Degraded = Warning ; Critical or Missing = Alarm
Current state: WARNING

Thresholds (Default):
- If Status value has degraded: Trigger a WARNING
- If Status value is Critical or Missing: Trigger an ALARM

Problem: This battery is degraded. Reported status: Learning
Consequence: Check that number of allowed recharges has not been exceeded and that the current full charge capacity (FCC) is close to the full charge capacity of initial battery.
Recommended action: The battery needs to be replaced or reconditioned.