Why not use an Automotive Battery for a Marine Applications?
Diehard marine batteries are designed to go through many deep discharges. Often the battery is completely discharged before it is recharged. This is called “deep cycling”. In addition, deep cycle batteries can also provide starting power for your marine or RV applications. Automotive Batteries are designed to deliver the short burst of power required to start a car or truck. An Automotive battery should not be subjected to deep discharges under normal operating conditions.