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Best Marine Dual Purpose Battery 2021 [Review]: What Features To Look For?

Due to increasing demand, manufacturers are also placing more emphasis on marine dual purpose batteries. There are dozens of dual purpose batteries on the market today and this will definitely become a challenge for many people.
For fishermen who do not have much experience buying batteries, chances are they will not find themselves the best marine dual purpose battery. The dual purpose battery for sale has its own pros and cons, so in order to choose a suitable model, you need to learn about them.
And we have spent a lot of time researching and selecting the best dual purpose battery list for beginners. The list is based on objective reviews and you can refer to it.

Top 4 Best Marine Dual Purpose Battery 2021 [Review]

#1 Odyssey 34M-PC1500ST-M TROLLING Thunder Marine Dual Purpose Battery (Editor’s Choice)


This dual purpose battery from Odyssey is an incredible power supply for your boats. This marine battery ensures your boats won’t get stuck at sea and that you won’t have to invest in a new model for 10 years.
With this dual purpose battery, the 1150 refrigeration amplifier is a highlight as it always maintains stable motor status. It hits 400 cycles at a discharge depth of 80 percent, an impressive figure compared to conventional deep cycle batteries.
In addition, the onboard electronic accessories will also be fully powered with this dual purpose battery. So it will ensure all the components on board are stable, working well with each other.
This dual purpose battery also has a remarkably fast charging time compared to most other dual purpose batteries on the market. You only need to spend about 4 hours onshore to fully charge it, so you will save even more time.
This model has a compact design, quite light, convenient to move or set up in many positions on the boat. It doesn’t take up a lot of space. And if maintained and used properly, this dual purpose battery can operate stably for up to a decade.

#2 Optima Batteries 8014-045 D34/78 YellowTop Dual Purpose Battery (12 Volts)


Optima is a well known manufacturer in this industry and we cannot ignore the dual purpose battery models from them. And after learning about this dual purpose battery, we really found the reason why Optima has grown so.
They really invest in and care about their products. This dual purpose battery is indeed a reliable model and it has also received a lot of positive reviews from customers.
It can power all engines and electronics on board ships. This energy source is stable and that helps to prolong the life of those devices.
Not only is this AGM battery equipped with spill resistance and corrosion resistance, but it is also fifteen times more vibration resistant than other popular dual purpose batteries on the market. This is a big plus that we think you should keep an eye on in your notebook.
Besides, this model is also famous as a dual purpose battery for boat with impressive durability. Overall it is a commensurate and valuable performance model.

#3 NorthStar NSB-AGM31M AGM Group 31 Marine Battery (Advanced AGM construction)


This dual purpose battery is another quality model that you should add to your priority list. This marine battery is a battery that has a fast start-up speed, provides stable and durable power.
Even when discharged at a depth of 50 percent, this dual purpose battery can achieve 900 times more cycle time. It performs well in extreme weather conditions and that’s a big plus when you won’t be able to predict weather at sea.
In addition, this AGM dual purpose battery is also designed to be sealed, ensuring no leakage or spillage occurs while it is operating. It has impressive vibration resistance, wear resistance and spill resistance.
With its compact size and comes with a handle, you can easily move it around. Its compact size will also make it possible to place it in many convenient positions and to fit your ship.
Overall it is a good dual purpose battery, durable, fast charging and comes with many good features. With this battery you will be able to drive the train without having to worry about the power to keep the engines running.

#4 Optima Batteries 8052-161 D31M BlueTop Starting & Deep Cycle Battery (Constant Performance)


Closing this list is another dual purpose battery from Optima and we definitely don’t need to discuss too much about this reputable manufacturer. This marine battery has always been one of the best-selling dual purpose batteries and has been recommended by many longtime customers to their friends.
This dual purpose battery is also equipped with unique spiral cell technology. With this technology, you can comfortably put this dual purpose battery in many positions, any position without leaking. It helps prevent leakage, resists spillage even under strong, continuous vibration.
This model can also work through extreme weather conditions. You don’t have to worry about rainwater, seawater or low temperatures affecting its performance. With a reserve capacity of 155 minutes, providing 900 amps of cold rotation, this dual purpose battery confidently maintains stable operation for the engine for a long time under any impact.
Overall, it is a high performance dual purpose battery, value and comes at a decent price.
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What are the Features to look for in a Dual Purpose Battery?

#1 Volt

For a cruise ship, you should choose a dual purpose battery 12 volts. This is the most suitable indicator and even longtime fishermen believe it.
You can also invest in other dual purpose batteries with different volt ratings, but trust me, that will only waste you more.

#2 Reserve capacity

Reserve capacity is an important feature that you should learn about in each dual purpose battery. It is usually measured in minutes and the good dual purpose batteries are able to reserve between 120 minutes and 160 minutes.
This larger reserve will help provide power to more equipment and engines on board. That is why you should choose a model with high storage capacity.

#3 Charging time

You should choose a dual purpose battery with short charging times, which means you don’t have to spend a lot of time on the mainland waiting for the battery to fully charge.
Besides, we recommend that you charge the battery properly with a dedicated charger so as not to affect the battery’s life.

#4 Size

The size of the battery is also a feature that you should consider. First of all, you need to determine the size of the battery tray or the location where you want to put the battery, then choose a dual purpose battery with the right size.
Its weight is also a factor influencing a lot. The first and easiest to see is the fact that you move the battery to the mainland to charge it. You certainly don’t want to have to move a heavy battery all the time over a range that isn’t easy to move, trust me.
There are many marine batteries available today that are compact in size but can do a lot of work. The dual purpose batteries in our list above are also the options that you should refer to.

Why Should Choose a AGM Dual Battery?

AGM batteries are rated as the number 1 high-end battery line currently known as dry batteries / air-tight dry batteries / maintenance-free batteries / VRLA batteries. AGM stands for Absorbent Glass Mat and it is a very popular battery type these days.
Battery shell is usually impact-resistant plastic, sealed tightly to prevent electrolyte (acid) from leaking out. In general, AGM batteries are maintenance-free, only need to install and run until the end of their life (about a few years), so it is very convenient.
Charging capacity, safety, starting current are all stable, should be considered as the most basic choice for means of transport, including boats.
The structure of AGM battery includes the cathode and anode plates that are alternated and separated by insulation panels. The battery cover and cover are made of ABS or PP material.
The battery insulation is made of fiberglass, so it is able to absorb acid solution – electrolyte solution to create bioelectric chemical reaction.
Pole version:
Anodes (PbO2): Separate design, good activity in electrolyte environment (H2SO4).
Negative (Pb): Designed for electrolyte solution (H2SO4)
The electrolyte solution in AGM battery is a mixture of sulfuric acid and water (H2SO4 + H2O).

Final Verdict

Currently, there are many types of batteries on the market, we should buy one to suit our needs. Take a little time to learn about the models you have feelings for, then choose the one that best fits.
We also hope you can find the answers helpful in this article!

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