Generator battery repeatedly goes dead between exercise cycles

Safety: Disable automatic start. Wear eye protection when working with batteries.

• Test charger output: Measure voltage at the battery with AC power present. It should be around 13.2–13.6 V. If not, replace the CAT battery charger.
• Check for parasitic loads: With AC power off and charger disconnected, measure current draw from the battery. Excessive draw indicates a parasitic load that must be identified.
• Inspect connections: Clean and tighten battery terminals and ground straps.
• Evaluate battery health: Load-test the battery. Replace if it fails or is beyond its service life.

If the battery still discharges quickly after these steps, a CAT technician should check the controller and wiring for hidden loads.