Looking for MIBs for Liebert UPSs

Have you seen this link?

LIEBERT-UPS-MIB (circitor.fr)

Number of current conditions present (like a failed battery test):

1.3.6.1.4.1.476.1.42.3.2.2.0

Battery test Result:

1.3.6.1.4.1.476.1.42.3.5.1.8    (unknown(1), passed(2), failed(3), inProgress(4), systemFailure(5), inhibited(6))

Estimated minutes remaining:

1.3.6.1.2.1.33.1.2.3     (zero if battery is known bad)

Also note that you could test the battery charge percentage (1.3.6.1.2.1.33.1.2.4). If it doesn't bounce back quickly after an automated battery test, it is getting weak. So alerting on this percentage being below 60% for several hours is a good indicator. (Weak batteries often drop to 50% immediately upon putting a load on the battery during a test or real outage).