![]() Technically, this is the number of amps a battery can deliver at 0☏ for 30 seconds without having the voltage drop below 7.2 volts. The term “Cold Cranking Amps” is used to quantify a battery’s ability to crank over an engine. A battery’s group number does not imply purpose, capacity, quality or other characteristics. ![]() Battery group numbers denote the size of the case, location of the battery terminals and general configuration. Just like the batteries used to power flashlights or drum-beating pink rabbits (D, C, AA, etc.), boat batteries come in standard sizes designated by their Group number. ![]() Your choice of battery chemistries should be based on the performance you desire balanced against how much you are willing to spend. Battery ChemistriesĮach of the battery types mentioned above is offered with a choice of battery chemistries, which are flooded lead acid, gel, AGM (Absorbed Glass Matt) and most recently, Lithium Iron Phosphate, such as those supplied to us by Relion. Dual-purpose batteries can be used for starting engines or powering house loads. Batteries designed for running loads are called house or deep cycle batteries. ![]() Those designed for starting engines are called cranking or starting batteries. There are three types of boat batteries: Starting batteries, deep cycle batteries and dual-purpose batteries. When boats have charging devices like alternators, solar panels or wind generators, batteries store electricity so charging devices don’t have to operate simultaneously with items that require electricity. Marine batteries store electrical energy so electrical loads like lights, motors and pumps can operate. ![]()
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