A cold-cranking amperes (CCA) rating specifies the minimum amperes available at _____ degrees Fahrenheit.

The cold-cranking amperes (CCA) rating is a crucial specification for automotive batteries, particularly in determining their ability to start an engine in cold temperatures. The CCA rating indicates the minimum amperes that a battery can deliver for 30 seconds at 0 degrees Fahrenheit while maintaining a voltage of at least 7.2 volts for a 12-volt battery system.

This rating is important because colder temperatures decrease a battery's chemical reaction rate, making it more difficult to produce the energy required to crank an engine. Therefore, when assessing a battery's performance under low-temperature conditions, the standardized testing criterium is conducted at 0 degrees Fahrenheit. This helps manufacturers and consumers understand how well a battery will perform in cold weather, which is essential for ensuring reliable vehicle starting in winter conditions.