1. Odyssey 31-PC2150S
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Specifications:
- Type: Dual purpose
- Group size: 31
- Chemistry: AGM
- Nominal capacity: [email protected]
- CCA rating: 1150
- PHCA rating: 2150
- Reserve capacity: 205 minutes
- Warranty: 4 years
The massive starting power makes it one of the most sought-after products in its niche. It is a
dual-purpose model that fits in group 31, an aspect that you must keep in mind to check if it is compatible with your boat.
It can handle the most difficult tasks even in harsh climatic conditions or during rapid vibrations. The recombinant technology it utilizes eliminates the need for refilling, so upkeep is out of the way.
It is rated at 1,150 CCA and 2,150 PHCA. The RC surpasses the standard as it is rated at 205 minutes. It is used to start boat, cars, vehicles, golf carts, and recreational engines, and you can utilize it for deep cycling applications like running onboard accessories like GPS systems, fish finders, and more.
A long lifetime can only be delivered by a resistant design, and the Odyssey delivers just that as it is manufactured to endure high impact shock and mechanical vibrations. Seeing how these two elements are the common causes of premature cell failure, you can breathe easy knowing you won’t go through this degradation process with it.
This product, like many others, is not only limited to use for a watercraft. Check out the best truck batteries if you are curious to see what other battery markets have to offer.
PROS
- Boasts a 100Ah 20-hour nominal capacity
- Peak service life of 10 years
- Can be used with any type of alternator or charger
- Generous 4-year guarantee
VERDICT
A heavy-duty battery that any boating enthusiast is sure to appreciate due to its long lifespan of up to 10 years, this Odyssey entry is a smart purchase that pays off for itself in no time. Moreover, it withstands harsh operating conditions like intense vibrations and extreme temperatures, which speaks best about its quality.
2. VMAXTANKS VMAXSLR125
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Specifications:
- Type: Deep cycle
- Group size: 31
- Chemistry: AGM
- Nominal capacity: [email protected]
- MCA rating: 1410
- CCA rating: 1130
- PHCA rating: 1875
- Reserve capacity: 260 minutes
- Warranty: 1 year
The VMAXSLR125 comes with military-grade alloy plates, and the container that it features is manufactured with ABS plastic. This deep cycle model weighs 75 pounds.
It claims a 20-hour nominal capacity of 125Ah, offering a reliable performance as few other products can. It belongs to the 31 group size, and it has an impressive service lifespan of 8-10 years.
It provides 1130 CCA, 1875 PHCA, and 1410 MCA. Another aspect that has captivated us is its 260-minute RC. It takes an estimated 12-24 hours to recharge it, and you can utilize a microprocessor-controlled charger or a charge controller.
The AGM technology shows it is impervious to shocks and vibrations. The carry handles allow easy maneuvering and placement. Additionally, a 1-year assurance is provided by the producing company.
PROS
- Reserve capacity rating of 260 minutes
- Rated at 1410 MCA
- Features the AGM technology
- Integrates convenient carry handles
VERDICT
Among its notable highlights stand the fast charge time, the lengthy 10-year service lifecycle, and the 260-minute reserve capacity, as well as the affordable asking price, of course. It’s a product worth looking into, so make sure that you thoroughly analyze it before deciding.
3. Optima Batteries 8016-103 D34M
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Optima Batteries 8016-103 D34M
Specifications:
- Type: Dual purpose
- Group size: 34
- Chemistry: AGM
- Nominal capacity: [email protected]
- MCA rating: 870
- CCA rating: 750
- PHCA rating: 1245
- Reserve capacity: 120 minutes
- Warranty: 2 years
The D34M is a dual-purpose model that weighs 43.5 pounds. The material of its plates is a pure lead-tin alloy, while the container is manufactured with polypropylene.
It has a 20-hour nominal capacity of 55Ah, and it belongs to group size 34.
It is rated at 750 CCA, 1245 PHCA, and 870 MCA. It boasts an impressive service lifespan of up to 10 years. The recharge time is between 6 and 12 hours, and you can utilize a constant voltage charger or an alternator for this task.
It is shock and vibration impervious since it features AGM technology. Furthermore, it is backed up by the manufacturer for no less than 2 years.
PROS
- The dual-purpose design makes it versatile in use – can be utilized as a deep style or cranking battery
- Quick recharge time ranging from 6 to 12 hours
- Non-spilling design lengthens its lifespan and increases safety in use
- Features high-quality pure lead-tin alloy plates
CONS
- Some users stated that it did not offer the promised service life
- There have been a few complaints regarding its ability to hold a charge
VERDICT
If you are on the hunt for a versatile boat cell, look no further than the D34M as this dual-purpose model perfectly plays two roles – cranking or deep cycle accumulator. Fairly priced considering its application and performance, we advise that you closely look at it.
4. Renogy RNG-BATT-AGM12-100
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Renogy RNG-BATT-AGM12-100
Specifications:
- Type: Deep cycle
- Group size: 31H
- Chemistry: AGM
- Nominal capacity: [email protected]
- Life cycles: 600
- Warranty: 1 year
A general-purpose accumulator that you will find useful in a wide series of situations, the Renogy is an AGM model that guarantees it is
spill and leak-proof, thus not requiring any effort on your part when it comes to maintenance.
It boasts an optimized capability to discharge high-current instantly, and it is rated at 100Ah at a 10-hour discharge rate. Its nominal voltage is 12V, the float voltage is 13.5-13.8V, while the charging voltage is 14.4-14.5V. The discharge operating temperature spans from -15 to 50 degrees Celsius, and the charge temperature from 0 to 40 degrees Celsius.
It measures 13 inches by 6.8 inches by 9 inches, while its 66-pound weight makes it easy for you it install it on your own. The casing is manufactured with ABS plastic to grant durability. Additionally, there is a 1-year guarantee provided for it.
PROS
- 100Ah capacity at a 10-hour discharge rate
- Delivers instant high-current discharging
- Upkeep-free design
- Reasonably priced
- The container is made with ABS plastic
CONS
- Expensive acquisition
- No information provided regarding MCA or CCA
VERDICT
A deep-cycle AGM model intended for solar energy storage applications, the Renogy meets high-quality performance in stride. It is reasonably priced, so you are likely to afford it even if there’s no discount for it, and it provides a long service life, so replacement is not going to be required anytime soon.
5. ACDelco M24AGM
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Specifications:
- Type: Deep cycle
- Group size: 24
- Chemistry: AGM
- Nominal capacity: [email protected]
- MCA rating: 624
- CCA rating: 500
- Reserve capacity: 140 minutes
- Warranty: 18 months
The high cycling capabilities and outstanding charge receptiveness make the ACDelco M24AGM an option worth taking into account.
It belongs to BCI group 24 and offers up to 3 times the cycle life of conventional batteries due to its valve regulated gas recombinant technology, which adds to its appeal.
Like any quality product in its niche, it utilizes the AGM technology so that water isn’t required, maintenance is inexistent, and no spills or leaks occur. Furthermore, this design guarantees the great deep cycle performance that is needed for marine applications. It provides 140 RC minutes, and it is evaluated at 500 CCA.
Its leak-proof pressurized valve system prevents acid damage to the terminals and drying out so that lifespan length is as generous as possible. Additionally, the producing company provides an 18-month assurance for it, so you are covered on the off-chance that anything happens to it.
PROS
- Lead-calcium alloy maximizes corrosion resistance
- Features a leak-proof pressurized valve system
- Utilizes the AGM technology that ensures no leaks or spills will occur
- Lower self-discharge rates during off-season storage
CONS
- Expensive purchase
- Lacks wing nuts
VERDICT
A BCI group 24 entry bound to provide great deep cycle performance due to the AGM technology it utilizes, the ACDelco M24AGM is an option worth considering. It not only delivers a lengthy lifecycle, but it comes at a reasonable price as opposed to most entries in its niche.
6. Exide XMC-31 MegaCycle AGM 200
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Exide XMC-31 MegaCycle AGM 200
Specifications:
- Type: Deep cycle
- Group size: 31
- Chemistry: AGM
- Nominal capacity: [email protected]
- MCA rating: 1180
- CCA rating: 925
- PHCA rating: 1535
- Reserve capacity: 200 minutes
- Warranty: 2 years
The XMC-31 is a deep cycle model that comes with an ABS plastic material for the container, weighing 74.6 pounds.
It has a 20-hour nominal capacity of 100Ah, and it belongs to the 31 group size. It provides 925 CCA, 1535 PHCA, and 1180 MCA.
It has an impressive reserve capacity of 200 minutes. If it is being handled properly, it will offer a service life of up to 8 years. It takes about 6 and a half hours for it to renew, and you can utilize an alternator or any charger for this task.
The carry handle allows you to place it where you need it with ease. Since it features AGM technology, it is shock and vibration resistant. It features 1/4” studs for copper terminals and SAE. When it comes to warranty, it is backed up for 2 years by the manufacturer.
PROS
- Large acid container retains more power and provides faster charging times
- Belongs to group size 31
- The lifecycle of up to 8 years when it is in service
- Designed to tolerate knocks and strong vibrations
- Allows charging from all chargers, alternators, and even solar panels
CONS
- Slightly more expensive than similar maritime accumulators
- Some complained that it is too heavy
VERDICT
A deep cycle model worth your money as it flaunts a long 8-year service life when utilized under proper conditions, the XCM-31 is a must-have for any boat owner. It can take a “beating” as it is shock and bump-resistant at a higher level than what this niche has accustomed us with. Furthermore, as opposed to most deep cycle models, it is backed by a lengthy 2-year assurance that you can take full advantage of.
7. Deka 8A24M Intimidator
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Specifications:
- Type: Deep cycle
- Group size:24
- Chemistry: AGM
- Nominal capacity: [email protected]
- MCA rating: 800
- CCA rating: 470
- Reserve capacity: 145 minutes
- Warranty: 1 year
The Deka 8A24M Intimidator is an upkeep-free battery that you can count on for years on end. It is seemly for a wide variety of applications, including for
leisure crafts, cars, caravans, motor homes, electric vehicles, sailing crafts, ski crafts, trolling crafts, and more.
As the AGM technology is utilized in its manufacturing, you can rest assured knowing that it flaunts a spill-free and leak-proof design. Furthermore, it is backed by a 1-year guarantee from the date of purchase.
PROS
- Suitable for marine and RV applications
- Dual-purpose battery – starting and power applications
- Features the AGM technology – upkeep-free design, spill and leak proof
- Backed by a 1-year assurance
CONS
- Some complained about its longevity
- CCA rating could have been higher
VERDICT
A dual-purpose battery that you can count on for a wide series of applications and that should be your go-to if you intend to use it for marine crafts or RVs, the Deka 8A24M Intimidator is a must-have as it offers years of service.
8. DieHard 38275 Group 35
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Specifications:
- Type: Deep cycle
- Group size: 35
- Chemistry: AGM
- Nominal capacity: [email protected]
- CCA rating: 650
- Reserve capacity: 100 minutes
- Warranty: 3 years
The DieHard 38275 Group 35 is ideal for maritime applications as it is intended to
withstand extreme temperatures, high vibrations, and deliver power to even the most demanding on-board accessories. It comes at an affordable price, and since it delivers a long service life, it spares you from making new purchases any time soon.
It boasts an upkeep-free design that makes it ideal for forgetful people. It is assessed at 650 for CCA, and 100 minutes RC. As it comprises a boosted electrolyte suspension system, it can absorb more electrolytes to safeguard internal components.
What makes us so confident in its long service life and great power output is that it integrates the full plate AGM technology. Furthermore, the producing company warrants it for 3 years since the acquisition date, which shows that this is a trusted product.
PROS
- AGM design guarantees it withstands the high power demands of accessories and elevated temperature conditions
- Spill-proof and upkeep-free design
- Can be mounted in any position you need
- Free replacement warranty is available for 3 years from the moment of acquisition
CONS
- Some complained that it didn’t last as long as other DieHard acquisition they dealt with in the past
- Some customers complained about compatibility issues
VERDICT
The safeguards it has in place to ensure high protection against vibration certifies it will serve you for many years. It’s safe to say that this is one of the best acquisitions you could make considering the long lifecycle and affordable asking price.
9. Odyssey PC680
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Specifications:
- Type: Deep cycle
- Chemistry: AGM
- Nominal capacity: [email protected]
- MCA rating: 280
- CCA rating: 170
- Reserve capacity: 24 minutes
- Warranty: 2 years
Providing up to 400 cycles at an 80% discharge, the PC680 presents you with a long-lasting battery that offers power to your boat and onboard accessories for years on end. As
it is capable of fully recharging in only 4 to 6 hours, its efficiency is undeniable. Since it boasts the AGM technology, you can mount it in any position you like as there are sure to be no acid spills. One of the traits that add to its efficiency and make it a popular selection is that it offers up to 15% more plate surface area.
As there are no dead spaces between the cylinders, it provides more reserve capacity than other options do, more precisely a hefty 24 minutes. It is shock, vibration, and corrosion-resistant so that it will function for as long as possible.
Since this dual-purpose model boasts a lightweight design, you will have no trouble mounting it on your own. Additionally, the producing company offers it a 2-year guarantee. Sure, it might not be as long as what Odyssey offers, for example, but it’s more than enough considering that it comes at a reasonable price as well.
PROS
- Offers up to 400 discharge/recharge cycles at 80% depth of discharge
- As it is tolerant of extreme temperature conditions, it guarantees a lengthy lifespan
- As it delivers complete mounting flexibility, you can install it in whatever position you want
- It comes at an affordable price
CONS
- Not the best CCA rating out there – only 170 amps
- Not compatible with cars
VERDICT
If your main interest is to have a battery that provides a long service time, then the PC680 is what you need. Not only can it serve you for up to 10 years, but it comes at a reasonable price and withstands extreme temperatures like a pro.
10. VMAXTANKS VMAX857
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Specifications:
- Type: Deep cycle
- Group size: U1
- Chemistry: AGM
- Nominal capacity: [email protected]
- MCA rating: 390
- CCA rating: 300
- PHCA rating: 500
- Reserve capacity: 75 minutes
- Warranty: 1 year
This is a deep cycle model that weighs just 25 pounds, making it the lightest in our top. The plates are made from military-grade alloys, and the container is manufactured with ABS plastic. It has a 20-hour nominal capacity of 35Ah, and it belongs to the U1 group size.
It offers 300 CCA, 500 PHCA, and 390 MCA.
It flaunts an impressive service lifespan of 8-10 years if it is taken care of. It has a reserve capacity of 75 minutes. The charging possibilities for it are a microprocessor-controlled charger, an alternator, or a charge controller.
It is shock and vibration resistant since it comprises the AGM technology. It features dual terminals with hex head bolts. Furthermore, it comes with a 1-year assurance.
PROS
- Weatherproof design makes it withstand any temperature without damage
- Pulse hot cranking amps rating of 500
- Enhanced shock and vibration resistance prolongs its lifespan
- Comes at a great, affordable price
CONS
- Inferior reserve capacity of only 75 minutes
- Some complained that it doesn’t come with a proper, complete datasheet
VERDICT
By definition a bang for your buck, especially because it comes at a cheap price, this maritime accumulator has captivated us with its long 10-year service life and weatherproof design that ensures it will work irrespective of the temperature. However, there are downsides to it, especially if you compare it side by side to other deep cycle models as it does not deliver the best reserve capacity nor CCA and MCA ratings.
11. Exide Edge FP-AGM24DP
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Specifications:
- Type: Dual purpose
- Group size: 24
- Chemistry: AGM
- Nominal capacity: [email protected]
- CCA rating: 775
- Reserve capacity: 145 minutes
- Warranty: 2 years
This is a dual-purpose model intended to be used for both cranking and deep cycle, and it is even suitable for cars.
The Cold Cranking Amperage is 775, which is not so much compared to more powerful accumulators but it is enough to get it started.
FP stands for the flat plate design that consists of six sets of plates separated by glass mats arranged in a straight line. It is robust and designed to last, with a non-spill AGM build that guarantees maximum safety in use. It features a strong starting and staying power that keeps it running like new each day.
Being a deep cycle model makes it more resilient to higher cycling and more efficient while recharging. Thanks to the SureLife Graphite technology, you can rest assured knowing it will yield on water.
PROS
- AGM technology guarantees an upkeep-free operation
- High durability granted by the Surelife graphite technology it integrates
- Dual-purpose design endorses it for deep cycling as well as cranking purposes
- Dry cell design warrants a spill-proof environment – mountable in any position
- Recombinant technology does not require distilled water refilling
CONS
- Cold-cranking amperage of 775 makes it less powerful than other dual-purpose models
- It is a costly acquisitions
VERDICT
As the Exide Edge is intended for deep cycle and cranking applications, it provides the versatility many boat owners are yearning for. Likewise, the affordable price makes it all the more appealing, canceling its flaws, especially for those who are not looking to make a hefty investment.
Maritime Accumulators 101
If you are not an expert in this field, you have come to the right place. Here, we have broken down all you need to know about the accumulators, their most important particularities, and elements, making it easy for you to understand them.
Technology
The technology refers to the chemistry, electrolyte medium, and conduction medium of the battery. Based on these elements, there are four basic types, more precisely AGM, flooded, gel, and lithium-ion batteries.
- The glass mates of AGM accumulators are absorbed with electrolyte, being placed between the lead plates. As the electrolyte saturates the glass mat, it permits water to form internally by recombining the oxygen with the hydrogen gas. These cells require the least maintenance, they are highly impervious to shock and vibration, and their self-discharge rate is exceptionally low.
- Flooded accumulators are better known as wet-cell batteries. Each wet-cell is composed of a mixture of distilled water and sulfuric acid. What makes them the preferred choice of many people is that they come at relatively cheap prices. Best of all, they do not sacrifice quality despite their price tag, being highly resistant to overcharging and overheating, and offering reliable service for a long time due to their durable construction.
- Gel models resemble flooded models in the sense that they are both filled with liquid electrolyte. What distinguishes them is that the liquid electrolyte contains silicates, giving it a gel structure. They do not require any maintenance work since they are sealed, they can withstand high overcharging, heavy shock, and heavy vibrations. Furthermore, they endure low temperatures. Gel models resemble flooded models in the sense that they are both filled with liquid electrolyte. What distinguishes them is that the liquid electrolyte contains silicates, giving it a gel structure. They do not require any maintenance work since they are sealed, they can withstand high overcharging, heavy shock, and heavy vibrations. Furthermore, they endure low temperatures.
- Lithium-ion models are a newer arrival, this being the reason why despite their increased safety and reliability, they have not managed to surpass other types of accumulators in popularity. They feature power control to prevent the possibility of an accidental overcharging. Furthermore, they are maintenance-free and environmentally friendly, their automatic features protect them from short circuit, low voltage, or reverse polarity, and they offer a deep discharge depth.
Application
Based on the tasks the accumulators can perform, they are divided into three different application categories – starting/cranking, deep cycle, and dual operation.
- Starting/cranking models crank the starter of the boat’s engine. This makes them the sprinters of the electrical system. They can deliver a maximum of 400 amperes for up to 15 seconds, afterward being recharged by the engine alternator. Their build consists of alternating layers of negative and positive plates that are insulated.
- Deep cycle models can power the electrical loads on the boat when there is no charging source available. They store energy and wait for it to be used. After being put through intense use, they fully recover due to their ingenious design that features thick plates with a high antimony content.
- Dual-purpose models have large, thick plates that contain a high amount of antimony. What makes them a great choice is that they can tolerate extreme deep discharges, being perfect for use in single battery powerboats for starting and running loads when the engine is turned off, and boats that feature a bank that performs double duty for engine starting and home applications.
Charging
Boat accumulators are unbelievably pretentious when it comes to charging. The consumed energy has to be put back immediately, or else it will sulfate, this being the moment when the performance and longevity decrease. Just be careful what you use to recharge them because these batteries have dissimilar charging options.
How It Improves Sailing Expeditions
Durability
The most dependable accumulators out there boast a design that makes them more durable when compared to other models. This means that they are an asset worth acquiring, granting a long service life that guarantees you won’t go shopping for another accumulator for a long while.
Low Maintenance
Another important advantage is the fact that they require little to no maintenance. These accumulators are AGM, lithium, and gel models, being the least pretentious since their design prevents spills and terminal corrosion. A perfect example of a cell that does not require much upkeep is the Optima Batteries 8016-103 D34M.
Resistance
Of course, vibration and shock resistance are other aspects worthy of consideration, the finest accumulators boasting high resistance to them. This means that they are less likely to get damaged, providing users with a reliable and constant top-notch performance, no matter what they are put through.
Difference Between a Marine and a Car Battery
It is easy to confuse marine and car batteries as these share common features and represent on their basis the same type of product, yet there are plenty of differences in discharge and design that affect the performance offered if not utilized for the intended applications.
Purpose:
- As implied by the name, car batteries are specifically manufactured to start the engine of the car. After powering the motor, it has little involvement left as the motor powers the electrical systems of the vehicle, all while recharging the battery to recuperate the power lost during the starting process.
- Marine models do more than simply start the engine as, besides this action, they provide energy for other devices aboard the boat. Thus, they don’t only provide the initial starting jolt but rather continue to work as they deliver a gradual supply of energy for onboard electronics.
- Conclusion: While car batteries are simple starting or cranking cells, marine models serve a dual purpose that provides more power through their design. The two cannot be interchanged as the purposes they serve are clear and straightforward, the somewhat superior power design of the marine cell being easily explicable considering the role it fulfills.
Design:
- Car cells generally have thin internal plates as their energy discharge is needed solely to jump the engine.
- Marine batteries need to provide continuous energy for all the systems onboard, so their internal plates are thicker for design aspects to comply with operational needs.
- The housing of marine models is usually made of thicker plastic as better insulation against impact and vibration is required.
As opposed to marine models, car batteries are cheaper in terms of pricing, but this is easily explicable seeing how marine batteries feature thicker plates on the interior and a more durable design.
Buying Guide
Purpose
Before you hurry to make an acquisition, first consider the purpose of the boat battery. For example, if you plan on utilizing it to crank the boat, you need a certain type of accumulator, while if you want to crank the boat and run onboard appliances, you have to go with another type of accumulator. The purpose that you need it to have will show you if you must go with a starting/cranking, a deep cycle, or a dual-purpose model.
Reserve Minutes
Show how long it can sustain a 25 amps load before it drops to 10.5V at 80°F. The longer, the better when it comes to this aspect, meaning that you must choose an accumulator with a lengthy reserve capacity, like the 260 minutes offered by the VMAXTANKS VMAXSLR125.
Amp-Hours Capacity
The Amp-hours measure how much energy it can deliver over 20 hours at a constant discharge rate until the voltage reaches 10.5V. To ensure you are making the right choice, go with an accumulator like the Exide XMC-31 MegaCycle AGM 200 that has a capacity of 100Ah.
Longevity
Of course, you have to ponder the longevity of the accumulator as well. Longevity refers to its cycle life, showing how many discharge cycles it offers over its lifespan. From this point of view, deep cycle models are superior to starting/cranking models since they can cycle repeatedly, meaning that they last for a longer period. To measure the longevity of the accumulators they sell, the manufacturers discharge the full accumulators at a temperature of 80F until their voltage reaches 10.5V. Afterward, they are recharged, and the process repeats until the batteries fail to hold half of their rated capacities.
CCA and MCA
These are power measurements you can guide yourself after to determine whether you have your eyes set on a quality accumulator or not. They show the amount of amperage it can offer for 30 seconds to maintain a minimum of 7.2V at a certain temperature.
- CCA, better known as cold-cranking amps, show the amount of amperage it provides over 30 seconds to maintain a minimum voltage of 7.2V at a temperature of 0°F.
- MCA, known as marine cranking amps, shows the amount of amperage it provides for 30 seconds to maintain a voltage above 7.2V at a temperature of 32°F.
Maintenance Tips
No matter the battery quality, it won’t last for long if you do not take proper care of it and if you do not utilize it under appropriate conditions. Therefore, make sure you comply with maintenance procedures to ensure performance will be on par.
Tip #1 – Do not reuse old batteries
Never mix in the old accumulators with the new ones. You might be tempted to think this is a good idea because it will increase capacity, but in fact, you are harming the new batteries. This happens because the old cells do not perform as well as they did, deteriorating the new ones too.
Tip #2 – Remember to clean it
What you must never forget is that cleaning is occasionally required. When dirt gathers on top of it, take a cloth and wipe it off. Also, as soon as corrosions appear on the cell terminals, handle them by using a wire brush post cleaner. By doing this, you extend the accumulator lifespan, and you uphold the constant and powerful flow of electricity that the boat needs.
Tip #3 – Pay attention to the charging recommendations
Without a doubt, charging is the most important maintenance task you have to do to keep the accumulator up and running for a long time. First of all, make sure you respect the recommended number of hours for recharging the specific accumulator you choose. Do not forget to recharge it immediately, especially if it has been stored separately or the boat has not been utilized for a long time.
Tip #4 – Check it for cracks and bulges
No matter the type of accumulator you go with, make sure to occasionally check for cracks and bulges. If these problems do arise, it means that either the alternator of the boat has a problem or the charger is overcharging it.
How to Install a Boat Accumulator
Although it might sound complicated to install a new accumulator in your boat, it is a straightforward procedure even for those who have not dealt with these kinds of tasks before. In case you have mounted a car accumulator before, you will find it a lot simpler to install a boat accumulator as well, the whole task taking less time. Nonetheless, regardless if you are experienced or not, it is still a chore that you will certainly be able to perform.
First, you have to buy a high-quality accumulator and check if you have a box as well. In case you do not already have one, buy it as it is important because it shields the accumulator from the elements. For the procedure, you need two wrenches that you will utilize to remove the connections of the old accumulator and install the new one. You should also have a small container of Vaseline with you as it comes in handy for lubricating the accumulator terminals.
To replace the old accumulator with a new one, locate it, and switch it off. Disconnect the cables, lift it out of the box, and store it somewhere safe. Now you must check the terminals to ensure they provide a reliable connection. Apply a small amount of Vaseline to these terminals and reconnect the cables while making sure no loose cables remain in your way. Use a wrench to check for the cables to be firmly attached to the accumulator terminals, and place the lid back on the box.
After installing it, check if the installation has been successful and if the accumulator works. Switch the accumulator’s power on and turn on an electronic device that uses it as a source of power. If the electronic device works, it means that the installation was a success, and you can start the boat to sail off with it. If it does not work, check the whole procedure again to make sure the cables are properly joined to the terminals.
Winter Storage Tips
As soon as winter makes an appearance, you stop using the watercraft that you own. The long winter nap that the boat is passed through inevitably affects the maritime accumulator if you leave it inside instead of properly storing it.
To make sure that the boat is ready for use when spring comes as the accumulator still works just as well as it did a few months back, we have written this section of the article to explain proper storing during winter.
- Disconnect and store
– As we have previously said, leaving it inside the boat throughout the cold season, when the watercraft is not used, is going to lead to the battery’s decay. What you should do is disconnect it to impede power depletion throughout this period. After disconnecting it, you can store it properly, more precisely in a dry and safe space. You should store it in the garage if you have one, or in a storage facility. Just make sure that where you do place it the temperature won’t fall below the freezing point.
- Avoid corrosion by cleaning and drying it
– Although it might be advertised as being highly impervious to corrosion, you should not take any chances as corrosion can appear on the terminals. To avoid oxidization, you should clean it with a mixture of baking soda and water after you take it out of the boat. Make sure you rinse it with clean water and wipe it dry before placing it in the storage space chosen for it. The composition of the cleaning solution will neutralize any acid that lays on the case. Also, it will help remove any existing corrosion.
- Do not forget to recharge once per month
– An unused boat accumulator can deteriorate a lot faster than one that is regularly used. As it takes a break, the chemicals inside it react, which causes it to self-discharge. The rate at which it discharges depends on its type and temperature, so there is no way to indicate how it occurs for all accumulators. What we can say with certainty is that discharge and battery destruction are avoidable through monthly recharge. When you are charging it, do not permit it to overheat or overcharge as you could cause more harm than good.
Rating Our Picks
20Hr Nominal Capacity
The 20-hour nominal capacity of a marine cell shows the number of amps it can deliver over 20 hours.
Cold Cranking Amps
Represent how much amperage it offers for 30 seconds to maintain a minimum voltage of 7.2V at 0F. Knowing that higher amperage shows a better quality, we rated our picks accordingly.
Pulse Hot Cranking Amps
Show how much amperage it can offer over a short duration of high rate discharge. To figure out the PHCA, we have multiplied the CCA they offer by 1.66. This is the formula you can use to learn the PHCA of any accumulator out there that does not specify this stat.
Marine Cranking Amps
The MCA indicates how much amperage it produces for 30 seconds to maintain at least 7.2V at 32F. Just like with CCA and PHCA, the bigger this amount is, the better.
Reserve Capacity
The reason why RC matters is that it shows how many minutes it takes to discharge down to 10.5V by 25 amperage discharge at a temperature of 80F.
Recharge Time and Options
Recharge Time and Options
Time is of the essence these days, this being the reason why we had to rate the batteries according to their recharge time and options. All of our picks can be recharged using an alternator and other charging options. Also, the recharge time influenced our ranking.
Frequently Asked Questions
How long does it take to charge?
The charge time depends on how discharged the battery is. Usually, it takes several hours for the recharge process to finish. When the cell is severely discharged, it should take up to 12 hours or even more for a full recharge.
How long does a marine battery last?
If you properly use and uphold the battery, it generally provides 4-5 years of service. To benefit from a maximum lifespan, you should use it for its intended purpose, charge it correctly, clean it to prevent corrosion and other hazards, and store it in a cool and dry place when not in use.
How to test a marine battery?
Before you begin the boating session, it is recommended to first test and learn if the battery is charged. You can do this by using a DC voltmeter that you connect to the cell or with the help of a load tester.
What do CCA and MCA indicate?
CCA is the rating that indicates the amperage provided by the accumulator over 30 seconds to maintain a constant 7.2 voltage when the temperature is at 0F. MCA is the rating that indicates the amperage required for a 7.2 voltage to be maintained at a 32F temperature over 30 seconds.
Why does it bulge?
If when you last inspected the accumulator you noticed that it has bulged, it might mean that the alternator has a problem that is directly affecting it, or that the charger is overcharging it. Check to see the issue and fix it as this problem can lead to the demise of the accumulator fast.
Does over-discharging affect its quality and lifespan?
Yes, over-discharging does take a toll on the lifespan and responsiveness of the battery. During discharges deeper than 50 percent, the cell cycle life is dramatically shortened, thus its service life decreasing as a direct result.
Can a deep cycle model jump the engine?
While it is indeed true that deep cycle batteries deliver less CCA than other types of accumulators, there should not be any problems when it comes to them starting engines. The answer to this question depends on the specific engine and battery at hand, so there’s no clear-cut response, but it is highly likely for it to deliver sufficient CCA for the engine to start with the provided current.
Does it need to be stored in specific conditions?
Each type of battery requires specific handling and storage, and we recommend you check out the instructions in the manual to make sure you are going through the right procedure to prolong the product’s lifespan as much as possible. Check out the instructions we provided too as these are general tips that apply in most situations, regardless of the specific model you are working with.
Conclusion
When being on the water is what relaxes you the most, you feel the need to spend as much time as possible on your boat. However, the difference between a smooth ride and a horrifying one is made by a single part – the watercraft battery. Before we conclude, we want to go over some of the standout products in this niche once more to help you rapidly reach a decision that complies with your expectations.
Best Marine Battery for Sale:
Odyssey 31-PC2150S
A dual-purpose battery with a 12V voltage power that has been designed for commercial and heavy-duty purposes specifically, the 31-PCS2150S from Odyssey is your best option for starting and powering electronics. It can recover up to 400 cycles at 80% discharge depth and recharges remarkably fast (100% is reached in only 4-6 hours of continuous charging). Furthermore, it resists heavy mechanical vibrations and shocks from impact. This makes it tolerant of improper conditions other batteries wouldn’t handle.
Editor’s Choice:
Renogy RNG-BATT-AGM12-100
A general-purpose deep cycle battery that can be utilized for a large series of applications, this Renogy entry is our favorite as it boasts an extensive capacity and is convenient to utilize due to its upkeep-free design. It is sealed so that no interventions are required, and manufactured to resist corrosion and lot leak or spill, regardless of use conditions. Furthermore, it instantly discharges high currents, which makes it perfect for emergencies.
Best Marine Battery for the Money:
VMAXTANKS VMAX857
As you have probably already concluded on your own, it is one of the cheapest high-end options to go for. Likewise, it does not shy away from delivering reliable performance, and its shock and vibration resistance makes it a long-lasting investment too.
Best Marine Battery for Trolling Motor:
Exide XMC-31 MegaCycle AGM 200
The Exide XMC-31 is the go-to trolling motor battery that is well worth the retail price because it boasts a high resistance to shocks and offers a whopping 200-minute RC. It works for both starting and deep cycling applications, which adds to its versatility in use. Moreover, compared to similar batteries, it can retain more power and charge considerably faster due to its large acid container. Putting into balance all of these aspects alongside the reasonable asking price, you can see why we recommend the XMC-31 for trolling motors.
Best for Electronics:
Optima Batteries 8016-103 D34M
The consistent performance and 120-minute RC make this Optima Batteries entry the go-to for trolling motors. Through its dual-purpose nature, it can be utilized for deep cycling and starting, all without performance loss. Another aspect that helps it reign supreme is the high vibration resistance that makes it stand strong in the harshest of conditions, which is expected considering its application.
The AGM profile makes it completely upkeep-free, an important aspect as your attention is not required to care for it in any way until the time comes to replace it. Speaking of, considering the long 10-year service lifespan under ideal operational conditions, you are likely to make an acquisition that will serve you for years to come if you opt for it.