What is cold cranking amps in a car battery?

Cold Cranking Amps (CCA) is a rating used to define a car battery's ability to start an engine in cold temperatures.

Here's what it means:

• Definition: CCA is the number of amps a 12-volt battery can deliver at 0°F (-18°C) for 30 seconds while maintaining a voltage of at least 7.2 volts.

• Purpose: It tells you how well the battery will perform in cold weather, when starting a car is more difficult due to thickened engine oil and increased electrical resistance.

Why is CCA important?

• Cold climates: The colder it gets, the more cranking power your battery needs. A higher CCA rating helps ensure your vehicle starts reliably.

• Engine type: Larger engines (like in trucks or SUVs) often require batteries with higher CCA ratings than smaller engines.

Example:

If a battery has 600 CCA, it can deliver 600 amps for 30 seconds at 0°F without dropping below 7.2 volts.

Tips:

• Choose the right CCA: Always follow your car manufacturer’s recommended CCA range. More isn't always better, but too little can lead to starting issues.

• Don't confuse CCA with CA (Cranking Amps): CA is measured at 32°F (0°C), so it's a less demanding test and will always have a higher number.