Cold Cranking Amps (CCA)
This is arguably the most important number for any Michigan driver. CCA measures a battery's ability to start your engine in the cold. Specifically, it's the number of amps a 12-volt battery can deliver at 0°F for 30 seconds. A battery with a high CCA rating is your best friend on a sub-zero morning, providing the raw power needed to turn over a cold, sluggish engine.