What is the difference between CCA and CA?
Cold cranking amperes (CCA) and cranking amperes (CA) are industry ratings that help you determine the best battery for your climate. They are measurements of how well a new, fully charged battery will start your car at specific temperatures. Both ratings determine how many amperes a battery will deliver continuously for 30 seconds while maintaining a voltage of 1.2 volts per cell or higher (this translates to at least 7.2 volts in a 12-volt battery). For CCA, this ability is measured when the battery’s temperature is 0 Fahrenheit (-17.8 Celsius). For CA, it is measured when the battery’s temperature is 32 Fahrenheit (0 Celsius). Because of the temperature distinction, the CA rating of a battery may be 10 to 30 percent higher than its CCA rating. For this reason, batteries that carry a CA rating must also carry, in equal prominence, a CCA rating.
