What is a marine or deep cycle battery?
These are actually different types of batteries. The common marine battery is often rated to marine cranking amps. It is designed to offer a quick shot of amperes in a very short time span. These batteries can provide thousands of starts but can usually only withstand 50 or so cycles. A deep cycle battery is designed with the capability of being discharged and charged hundreds of times. Many of these batteries may be totally discharged or drained before they are ever recharged.