Which rating indicates a battery's ability to start the engine in cold conditions?

• A. Cold Cranking Amps (CCA)
• B. Reserve Capacity
• C. Cranking Amps
• D. Peak Power Rating

Answer: (A)

Cold starting requires delivering a lot of current to the starter even when the engine is cold. Cold Cranking Amps measures exactly that capability: how many amps the battery can deliver for about 30 seconds at very cold temperatures while keeping enough voltage to start the engine. This rating directly reflects how well the battery will perform in winter starts.

Reserve Capacity is about how long the battery can power the vehicle’s electrical load if the alternator isn’t charging, not about starting in the cold. Cranking Amps is the starting current at a more moderate temperature, not specifically the cold-weather test. Peak Power Rating relates to brief, maximum power output, not sustained cranking in cold conditions.