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31S

BATTERY W/3/8TRDS

This is a 12-volt, Group 31 heavy-duty starting battery with 3/8-inch threaded stud terminals. It's designed to provide reliable cranking power for diesel and gasoline engines in trucks, buses, and off-road equipment. Typical Group 31 batteries offer around 950 cold cranking amps (CCA) and a reserve capacity of 175 minutes, though exact ratings may vary by manufacturer. Replace the battery when it no longer holds a charge, shows signs of case swelling, or fails to start the engine consistently.