The marine battery is meant to start your boat engine and run the electronics. However, it isn’t always simple to find the best marine battery on the market. That’s why we put together these deep cycle marine battery reviews to help you find the model that suits your needs.


Preview

Product

Battery Type

Amp Rating (CCA)

Check Price

Optima Batteries 8016-103 D34M BlueTop...

Optima Batteries 8016-103 D34M

AGM

750

Weize 12V 100AH Deep Cycle AGM SLA VRLA...

Weize

AGM

750

Renogy 12V 200AH Rechargeable Deep Cycle...

Renogy

Gel

unknown

VMAXTANKS VMAX V35-857 12 Volt 35AH AGM...

VMAXTANKS V35-857

AGM

300

Optima Batteries 8014-045 D34/78 YellowTop...

Optima Batteries 8014-045 D34/78

AGM

750

Odyssey 31M-PC2150ST-M TROLLING Thunder...

Odyssey 31M-PC2150ST-M

AGM

1150

ExpertPower 12v 33ah Rechargeable Deep Cycle...

ExpertPower EXP12330

SLA

N/A

Mighty Max Battery 12V 55Ah Power Boat...

Mighty Max

AGM

N/A

UPG 85980/D5722 Sealed Lead Acid Battery...

UPG 85980/D5722

SLA

315


Why Invest in Quality Marine Grade Batteries?

Why should you purchase the best marine batteries on the market? There are many reasons to consider a quality deep cycle marine battery. First, the deep cycle battery can be discharged to eighty percent without sustaining any damage. It also provides power to your appliances, motor, and electronics while having a low risk of overheating. In addition, the battery is made with solid lead plates and lasts longer than many other battery types.


Choosing a High-Quality Marine Battery

Usage

Consider the plan for your battery before making a purchase. If you need the best marine battery for trolling motor, it does no good to look for a battery designed to run the electronics. However, you can find plenty of dual-purpose batteries that will accomplish both starting the engine and running the accessories.

Battery Model

You have three main types of batteries to consider: deep cycle, starting, and dual-purpose. The deep cell marine battery offers consistent power to the electrical appliances and trolling motor. On the other hand, the best marine starting battery delivers a higher amount of cold-cranking amps to get the motor running. Finally, the dual purpose marine battery is the ideal combination between the two. However, this convenience comes with a higher price tag.

Engine Compatibility & Battery Size

As you read through the marine battery charger reviews, you want to ensure that the option you choose fits your vessel. You will find battery groups such as 24, 27, 6D, 8D, and more. This size corresponds with the marine battery box size. You can either measure this box to find the right size or look for a comparable replacement to what you are already using.

Cold Cranking Amps

CCA, cold cranking amps, is the term used to measure starting power. Overall, it is the measure of the amps that a battery can deliver over 30 seconds while operating at 0°F. The larger the CCA rating is, the more capable it is to start the engine, even in poor weather conditions. You might also see MCA, or marine cranking amps when talking about batteries for your boat. This figure is rated at 32°F instead.

Capacity

If you want to know the battery capacity, you read the amp hours (Ah). This number shows you the amount of power that the battery can deliver for one hour. So, you might see figures such as 20A for five hours or 5A for 20 hours. The higher the capacity, the more equipment you can run and for longer times. You also want to make sure you have the appropriate voltage needed.

Life Span

It does no good to find the best marine cranking battery if it has been sitting on a stock room shelf for a year. As time goes on, the batteries start to lose effectiveness. To ensure the longest life possible, you must check the manufacture date. Ideally, you want an option that is less than six months old.

Resistance

The best AGM marine battery offers many features that keep it running its best. First, you want it to be shockproof and vibration-resistant to ensure it has a long life. Furthermore, you want it to be spill- and leak-proof to keep everyone safe. Finally, it’s vital that the design is corrosion-resistant to ensure you don’t have to maintain it more than necessary.

Handles

While you don’t want to handle the marine starting battery more than necessary, there will be times when you need to carry or move it. Whether you are planning to store the battery for the winter or you want to swap it out with a replacement, having a handle makes the process much easier.

Price & Warranty

Everyone wants to find the best price on marine batteries. However, the cost can’t be your only factor. While it might seem like a great deal to find the best marine battery under $100, you might not get everything you need. Instead, look for a top brand that has highly-rated marine battery reviews and a comprehensive warranty.


9 Best Marine Batteries Reviewed

1. Optima Batteries 8016-103 D34M

Our Top Pick!

Battery Type

AGM

Voltage

12V

CCA

750

Dimensions

10 x 6.9 x 7.8 inches

Warranty

2-year

To kick things off, let’s look at this Optima marine battery. It is a 12-volt battery with 750 cold cranking amps for optimal starting power. This AGM battery contains a unique SpiralCell design that contains two lead plates coated with lead oxide. This construction helps it to be fifteen times more vibration-resistant for maximum durability. In total, the battery includes a 120-minute reserve capacity.

You can use this battery for your trolling motor, marine applications, heavy electrical accessories, or RV. The company also offers several purchasing options besides just purchasing the battery. You can also opt for the battery/maintainer/charger package or the battery and starting battery package. You will pay a little more for one of these packages. However, the additional versatility makes the cost worth the expense.

Overall, the reviews on this battery are highly rated. With that said, there is still a group of negative reviews that must be addressed. Some people found that the BlueTop batteries failed prematurely. This could be due to the way the batteries were used, but the company is willing to provide a two-year warranty. This protection should provide all of the peace of mind needed to move forward and enjoy your time on the water.

Pros

  • Includes SpiralCell technology
  • Several packages available
  • Vibration-resistant
  • Maintenance-free

Cons

  • Some report premature failure

2. Weize

Best Marine Battery for Starting and Electronics

Battery Type

AGM

Voltage

12V

CCA

750

Dimensions

12.1 x 8.9 x 6.7 inches

Warranty

1-year

If you are looking for a lower cost AGM marine battery, you might prefer this option from Weize. What makes this model unique is the ability to connect a solar charger. It's a 12V battery with high-performance specs that ensure a long service life and deep discharge recovery. Use it with your marine vessel or any off-grid application, RV camping, trolling motor, backup sump pump, mobility scooter, and more. You can even hook it to your golf cart, electric vehicle, or lawn and garden tools.

This 12-volt battery does weigh a little more at nearly 60 pounds. That's something to keep in mind if you weren't looking to tote around heavy batteries. There is a convenient handle located on top that makes the replacement a little easier. Overall, it's a great AGM battery for a lower cost. Plus, you still get to take advantage of the leak-proof, spill-proof, and maintenance-free design.

This company also receives high reviews from customers. The only concerning aspect of this option is the one-year warranty. It's lower than many other companies offer. However, it doesn't appear that premature failure seems to be a regular occurrence, so you shouldn't have to worry. Overall, it's an excellent choice for starting the engine or running the electronics.

Pros

  • Can be used in a variety of applications
  • Highly rated
  • Handle included
  • Maintenance-free

Cons

  • Shorter warranty term

3. Renogy

Best Small Marine Battery for Trolling Motors

Battery Type

Gel

Voltage

12V

CCA

unknown

Dimensions

20.6 x 9.4 x 8.8 inches

Warranty

3-year

At the top of the line, you will find this 12 volt deep cycle marine battery from Renogy. It’s the ideal marine battery for a trolling motor thanks to the unique design and power. This gel battery has a specialized construction that keeps the electrolyte suspended and combines advanced valve regulated technology for a durable performance. You won’t have to worry about maintenance or acid leakage with this model.

The company claims that the corrosion-resistant grid adds up to 12 years of standby power, and it seems that customers tend to agree. It features a monthly discharge rate of less than three percent at 77°F, which is five times lower than flooded batteries. You can easily connect several of these batteries in parallel if you require more power. On the other hand, if this option is too powerful for your applications, consider the 100Ah Renogy battery instead.

The downside to a battery with this type of capacity is the weight. This particular model tops the charts at 128 pounds, so you will need help with the installation. On the bright side, Renogy is happy to offer customers a three-year warranty, which is longer than many of the traditional brands.

Pros

  • 3-year warranty
  • Durable construction
  • Corrosion-resistant grid
  • Maintenance-free

Cons

  • Heavy

4. VMAXTANKS V35-857

Best Deep Cycle Marine Battery

Battery Type

AGM

Voltage

12V

CCA

300

Dimensions

7.7 x 5 x 6.1 inches

Warranty

1-year

On the budget end of the spectrum, you can choose this AGM battery from VMAX. It’s also available as a complete battery kit from the manufacturer if you want to add some valuable components to the mix. This battery is constructed with heavy-duty grids made from lead tin alloys. These provide the extra performance and service life you are looking for, in both cyclic and float applications.

The AGM design ensures that you don’t need to think about maintenance. There’s no reason to check the fluid level or add water. Plus, you won’t be concerned about spills or leaks with the sealed construction. This particular battery is also lightweight at just 25 pounds, allowing for quick installation.

Because of the lower cost of this AGM deep cycle marine battery, you have to expect that there will be some sacrifices. The first is the lower CCA. In fact, this model only features 300 CCA, so it’s not the best option for starting the engine.

While the customer reviews are off the charts, it’s also vital to notice that this battery only includes a one-year warranty. If it fails prematurely after that first year, you will need to purchase a new battery on your own.

Pros

  • Highly rated
  • Heavy-duty grids
  • Lightweight
  • Maintenance-free

Cons

  • Low CCA

5. Optima Batteries 8014-045 D34/78

Best Dual Purpose Marine Battery

Battery Type

AGM

Voltage

12V

CCA

750

Dimensions

10 x 6.9 x 7.8 inches

Warranty

3-year

If you want to start the engine and run accessories, you can’t go wrong with this 12V marine battery from Optima. It has maximum power with 750 cold cranking amps and 120 minutes of reserve capacity. You will be able to start your engine, even when the weather is poor. In addition, Optima batteries are constructed to provide fifteen times more vibration-resistant than the typical model.

You will find that this battery can handle the load of the running lights, AV system, winch, hydraulics, and stereo system with ease. It is constructed with a SpiralCell design that provides clean, reliable power. The low self-discharge rate also makes it the best choice for seasonal usage. Just hook it up to the best 3 bank onboard marine battery charger to keep it powered up.

As with the other option from Optima, the reviews seem to go one way or the other. Some people can't get enough of the brand, and others have had trouble recently. You want to keep this in mind before making a purchase, but it's also vital to consider the three-year warranty included with this line. The additional warranty term keeps you protected from premature failure and offers more peace of mind.

Pros

  • Highly rated
  • 3-year warranty
  • Spiral Cell technology
  • Maintenance-free

Cons

  • Recent quality concerns

6. Odyssey 31M-PC2150ST-M

Top of the Range

Battery Type

AGM

Voltage

12V

CCA

1150

Dimensions

16.8 x 11.1 x 11.9 inches

Warranty

3-year

If you are looking for an ideal marine cranking battery, you can’t go wrong with the Odyssey brand, but you must be prepared to pay more. With 1150 CCA, this battery features the power you need to start the engine in any weather. The company also claims it offers a seventy percent longer cycle life compared to most deep cycle batteries. The high voltage offers what you need for a longer period.

Furthermore, you get speedy charging times. In less than six hours, you can receive a full recharge, allowing you to get back on the water faster. In addition, it will operate at temperatures down to -40°F and up to 176°F. Because it is an AGM battery, you can mount it in any position without concern about spillage. It also features vibration and high impact shock protection.

Overall, you can't ask for better reviews on this battery. Plus, the company is gracious enough to supply a three-year warranty. The difference with Odyssey's warranties is that they are not pro-rated as some other brands are. If the battery fails during those three years, you get a completely new battery, no questions asked. That alone is worth the added expense to purchase from Odyssey.

Pros

  • Maximum CCA
  • 3-year warranty
  • Fast recharge time
  • Maintenance-free

Cons

  • Expensive

7. ExpertPower EXP12330

Best Cheap Marine Battery

Battery Type

SLA

Voltage

12V

CCA

N/A

Dimensions

7.7 x 5.2 x 6.3 inches

Warranty

1-year

You don’t have to spend a lot of money to get a functional marine battery. In fact, this option from ExpertPower will do for the majority of users. It’s a sealed lead acid battery that operates under many temperatures. You can use it in -40 °F to 140 °F temperatures with ease. It will also recharge with temperatures ranging from 4 °F to 122 °F.

This 12-volt battery has a ten-hour deep cycle ability and weighs just 23 pounds. In addition, it is compact for the smaller battery boxes. You won’t have any trouble installing it and will be pleased with the maintenance-free design. In no time, you can be back out on the water, enjoying the warm weather and sunshine.

For the price, it’s amazing that this battery has so many positive reviews. However, it isn’t suitable for most motors, so you want to stick to using it for accessories only. Otherwise, you might be disappointed. On the other hand, the company still provides a one-year warranty, which is quite exceptional considering the bargain. If that’s not enough, ExpertPower also provides customers with a 90-day guarantee. If you aren’t satisfied during that time, they will take the battery back.

Pros

  • Cheap
  • Highly rated
  • 90-day guarantee
  • Maintenance-free

Cons

  • Low power

8. Mighty Max

Best Large Marine Battery for Trolling Motors

Battery Type

AGM

Voltage

12V

CCA

N/A

Dimensions

9.02 x 5.43 x 9.13 inches

Warranty

1-year

Another low-budget option is from Mighty Max. This AGM rechargeable battery is maintenance-free and won't spill. You also don't have to worry about what position you mount it in since it won't leak. This battery is especially known for the longer service life, deep discharge recovery, and wide operating temperatures. It's also lightweight for easy installation.

Even though it is a cheaper battery option, it still features solid construction. In fact, you can count on the shock- and vibration-resistant properties. Inside the case, this battery is made with a heavy-duty calcium-alloy grid for maximum performance in either the cyclic and float applications. Use this battery for your trolling motor, consumer electronics, golf cart, lawn or garden tools, emergency lighting, and so much more. There are too many uses to list them all.

You might notice that this battery doesn’t receive as many five-star reviews as some other options. That is mainly because of the reliability. It’s just not as reliable as a $300 marine battery would be. However, it will get you by in a jam. Plus, the company offers not only a one-year warranty but also a 90-day money-back guarantee. If you don’t appreciate the performance or are unhappy for any reason, make sure you contact the company within that return period.

Pros

  • Cheap
  • Lightweight
  • 90-day guarantee
  • Maintenance-free

Cons

  • Lower customer reviews

9. UPG 85980/D5722

Best Lightweight Marine Battery

Battery Type

SLA

Voltage

12V

CCA

315

Dimensions

10.2 x 10 x 6.5 inches

Warranty

1-year

To finalize the list, we will examine one more cheap option. This SLA battery provides a maintenance-free operation, so you have less to think about. It's simple to install because of the lightweight design. That's part of the reason it's valuable in other systems. Aside from using it in your marine application, consider buying some for your spotlights, backup system, and other equipment.

You can't really ask for more from the customer reviews, either. Generally, when a battery is this low priced, it comes with a ton of negative reviews, but that's not the case with this model. In fact, the overwhelming majority of customers felt comfortable offering a five-star review. Still, the lower cost does reduce the warranty time. You will only get a year of protection. However, if the battery lasts for many years, you have scored quite the bargain.

On the downside, you won’t want to use this battery for starting the motor. It only features 315 CCA, which is going to struggle, especially in extreme temperatures. For this reason, it’s best to use this battery for your appliances and electronics instead. When it is used properly, it’s likely that you won’t face any disappointment and can offer your own five-star review.

Pros

  • Cheap
  • Lightweight
  • Highly rated
  • Maintenance-free

Cons

  • Not powerful enough for starting motor

Marine Battery Types & Models Explained

  • Sealed Lead Acid 
    The SLA battery is also known as a Valve Regulated Lead Acid battery. This type maintains several characteristics. First, it is maintenance-free. It can also be mounted in several positions and is leak-proof. This battery will contain a safety vent that releases gas if the internal pressure builds up. These batteries require less upkeep and last longer than the typical lead-acid battery. Plus, these are often cheaper than the comparable AGM battery.
  • AGM (Absorbed Glass Mat) 
    The AGM battery is a type of SLA battery. It states that the electrolyte is absorbed in the separators between the plates. These separators consist of a sponge-like fiber mat made of fine glass material. Again, this type of battery is also maintenance-free, leak-proof, and can be mounted in any position. It's a very similar style to the lead acid battery but will cost a little more due to the unique design and increased durability

Marine Battery Usage Tips & Safety Precautions

It’s vital that you maintain your deep cycle marine battery with these essential steps.

  • Don’t allow the battery to discharge below 20 percent too often.
  • When you store your batteries, use the best marine battery maintainer to prevent self-discharge.
  • Use the best marine battery charger. By overcharging or undercharging the battery, you can create permanent damage.
  • Keep the cable connections and battery terminals free of corrosion. You can easily clean the marine battery terminals and connections with a baking soda solution.

Charging a Marine Battery

What is the best way to charge a deep cycle marine battery? Once you find the best marine on board battery charger or the best solar panel to charge marine battery, you want to set up the equipment according to the owner’s manual. To help the battery last as long as possible, follow these tips

  • Keep the marine battery charger in a trickle setting whenever you can.
  • Use Vaseline to coat the battery terminals to prevent corrosion and improve the connection.
  • Avoid using the battery in excessively hot or cold temperatures.
  • If you need to top off multiple batteries at once, you can opt for a 2 bank marine battery charger or 3 bank marine battery charger.
  • If the battery starts to become less effective, consider reconditioning the battery.

Here are some more helpful guidelines when charging a marine battery.


People Also Ask (FAQs)

How long do marine batteries last?

The majority of marine batteries will last between five and seven years, but this largely depends on what type of battery you purchase and how you take care of it.

What are common reasons why marine batteries fail?

First, the battery might have been exposed to extreme temperatures. Secondly, you might have charged it incorrectly or stored it inappropriately. It’s also possible that the batteries were not installed correctly, leaving them at risk for failure.

What are some tips on taking care of these batteries?

When you want to prolong the life of your marine battery, it’s vital that you store it when it’s not in use and keep it properly charged. While the battery is in storage, make sure you research who makes the best marine battery charger to keep it at appropriate levels.

What to expect from budget, mid-range, and expensive marine batteries?

The price you pay for a marine battery will directly affect the performance you receive. A low-budget might get you by for now, but it will likely contain lower cold-cranking amps and won't run multiple accessories at once. Instead, opt for a mid-range or expensive battery for a longer life and more durability.

Can a deep cycle battery start a boat’s engine?

The 12v deep cycle marine battery isn’t ideal for starting power because it contains less cranking amps. However, it could be used in a pinch, as long as it meets the vehicle’s amperage requirements.

How many batteries do I need for my boat?

You will want at least two batteries and the best marine battery switch. One battery is meant to start the engine, while the other is meant to run the accessories. In addition, with the switch, you can decide which battery gets charged while the engine is running.

How do deep cycle batteries differ from cranking batteries?

The deep cycle battery is meant to run the accessories on your boat, while the cranking battery starts the engine.

What are the differences between Optima's Blue, Yellow, and Red Top batteries?

Who makes the best deep cycle marine battery? We are partial to the Optima batteries, but you have several options, designated by colors. The RedTop batteries provide a higher cranking power to start the vehicle. YellowTop batteries are considered deep-cycle and run the accessories. Ideally, you will want a BlueTop battery as a vessel or RV marine battery.


Conclusion

What is the best 12 volt deep cycle marine battery? The Optima Batteries 8016-103 D34M is a BlueTop model, ideal for marine use. Plus, it offers 750 cold-cranking amps for reliable starting power.

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