What is mca on a battery?

MCA stands for Marine Cranking Amps, which is a rating used to measure a battery's ability to start an engine in marine vehicles such as boats. It is specifically designed to withstand the harsh conditions of being out on the water.

MCA is different from Cold Cranking Amps (CCA), which is the rating used for automotive batteries. MCA ratings are usually higher than CCA ratings, as marine engines typically require more power to start.

When choosing a battery for a marine vehicle, it is important to consider the MCA rating to ensure that it is sufficient for the size and type of engine in the boat. A higher MCA rating means the battery will provide more power to start the engine, especially in colder weather conditions or if the engine has a higher compression ratio.