What is a dual-purpose marine battery?

Marine Dual-Purpose Batteries combine the performance of starting and deep cycle battery, and are a good choice on smaller when there’s no room for two batteries. While they’re able to perform the tasks of a starting battery and deep cycle battery, they’re not as efficient as separate batteries.

What does dual-purpose mean on a battery?

To put it simply, dual-purpose batteries have the ability to function as both deep cycle batteries and starting batteries. With thicker and larger plates as compared to starting batteries, these batteries are known to be the best option for handling deep discharges, which typically ruin most starting batteries.

How do you charge a dual-purpose marine battery?

Make sure your 12-volt constant current charger is turned off. Hook up the negative, black terminal to the negative side and the red, positive terminal to the positive side. Your first phase of charging is termed bulk, where you maintain constant charger amperage and your battery’s voltage increases.

What is the difference between a marine starting battery and a deep cycle battery?

Overview of Cranking Battery vs. Deep Cycle Marine Battery: A cranking battery ensures a boat can easily start and get out on the water. A deep-cycle (trolling) battery keeps it operating and runs electronics in any conditions.

Should I use a dual purpose marine battery?

Dual purpose batteries are ideal for applications that require starting and deep cycle service. They deliver powerful cranking amperage for easy starting, and low amp draw service for reliable auxiliary power.

Can you use a dual purpose battery for a trolling motor?

A dual-purpose battery provides enough power to start the engine and turn it over, while also providing enough energy to keep your trolling motor running consistently. As the name implies, dual-purpose batteries can be used for both purposes.

How do I know if my battery is SLI or deep cycle?

Deep cycle batteries are composed of thick solid lead plates. Because the plates are thicker there is less surface area producing less current….Design.

	Deep Cycle Battery	SLI Battery
Density of plates	Thicker	Thinner
Current produced	Steady lower current	Higher current

Are dual purpose marine batteries deep cycle?

Simply put, dual purpose marine batteries can perform the function of both traditional deep cycle and starting batteries. With larger, thicker plates than starting batteries, dual purpose batteries are ideal for tolerating deep discharges that would ruin a typical starting battery.

What are the best dual purpose marine batteries?

That’s an impressive punch for such a small battery. Paired with a three-year warranty from Optima Batteries , the 8040-218 D35 YellowTop model is the best dual purpose marine battery for a great price.

What is the best rated Deep cycle marine battery?

Quick Answer: The 7 Best Rated Marine Batteries For 2019. Universal Power Group Deep Cycle Lead Acid Battery. VMAXTANKS AGM Marine Deep Cycle Battery. Odyssey 31-PC2150S Marine Starting Battery. Optima Batteries BlueTop Marine Starting Battery. Optima Batteries YellowTop Dual Purpose Battery.