What is cranking amphere?

Cranking amperes (CA) refer to the amount of current a battery can deliver at a specific temperature (usually 0°C or 32°F) for a short duration, typically 30 seconds, while maintaining a minimum voltage level. This measurement is crucial for determining a battery's ability to start an engine, particularly in cold weather conditions. Higher cranking amperes indicate a battery's greater capacity to provide the necessary power to turn over an engine. It's an essential specification for automotive batteries, especially in environments where temperatures can drop significantly.