If a UPS complies to the standard MIB defined in the RFC 1628 the following values should work:

 

OID for Running On Battery: 1.3.6.1.2.1.33.1.2.2.0
Evaluation (Regex): ^[1-9][0-9]*$

OID for Minutes Remaining: 1.3.6.1.2.1.33.1.2.3.0
Multiplier: 1

OID for Charge Remaining: 1.3.6.1.2.1.33.1.2.4.0
Multiplier: 1

 

These values are predefined in OPMONis when you add a new UPS to the monitoring.

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