Best Marine Battery Reviews

10 Best Marine Batteries (Reviews Updated 2019)

If you’re a boating enthusiast, you can greatly benefit from the best marine battery that will run your electrical equipment and start your engine, all while being resistant to the elements. You need to pick the right unit that offers consistently good performance with little to no maintenance required.

We’ve created this buying guide that will make your purchasing decisions easier by showing you the various aspects you need to consider when picking out the best battery for you. We’ve also compiled the best marine batteries we’ve reviewed and listed out their notable features.

The Top Marine Batteries Of 2019

Here’s the 10 best marine batteries:

1. Universal Power Deep Cycle-type AGM Battery (100Ah, 12V) (Best Overall)

Universal Power Deep Cycle Type Agm Battery

Review

This Universal marine battery will let you run each one of your devices because it uses the 12V standard that most marine electronics run on. Despite its power, the battery is quite compact, being 12 in. wide and a little above 9 in. tall. It’s also spill-, vibration-, and shock-proof, and you can enjoy a 1-year warranty in case of a defect. Finally, this battery is fully rechargeable and mountable in virtually any position.

Notable Features You Need To Know About:

  • Deep-cycle
  • Durable
  • Mountable in every position
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2. ExpertPower EXP12200 Deep Cycle-type Battery (20Ah, 12V) (Editor’s Choice)

Expertpower Exp12200 Deep Cycle Type Battery

Review

This lead-acid marine battery has a non-spillable, and fully-sealed design, which means that little to no maintenance is required, and valve regulation is automatic. All you need to do is install it to your rig, and it can be left to its own devices. With its easy installation and maintenance, we recommend this unit for boating beginners.

Notable Features You Need To Know About:

  • Durable design
  • Low maintenance
  • Easy installation
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3. ExpertPower Marine Battery Rechargeable (18Ah, 12V) (Best Value)

Expertpower Marine Battery Rechargeable

Review

ExpertPower’s lead acid-type battery is covered in durable ABS plastic that makes it resistant to shock, heat, and vibration. Installation is hassle-free, and afterward you can enjoy consistent levels of power with little to no maintenance required. This battery is also known to have a very long lifespan, so you won’t have to look for replacements any time soon.

Notable Features You Need To Know About:

  • Nuts and bolts-type connection
  • Durable ABS plastic
  • Easy installation and no maintenance
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4. Optima Batteries Starting BlueTop Marine Battery Deep Cycle (D31M)

Optima Batteries Starting Bluetop Marine Battery Deep Cycle

Review

This all-in-one battery from Optima acts as both as a start-up with 900 cranking amps and a power source for your devices with a 12V standard charge. This way, you’ll save both money and space instead of buying two units. With a 155-minute reserve capacity, you’re ensured consistent performance in a variety of different conditions. Much like other Optima models, this battery is vibration resistant and very durable.

Notable Features You Need To Know About:

  • Deep cycle and starting function
  • 155-minute reserve capacity
  • Vibration-resistant
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5. Optima Batteries Starting RedTop Marine Battery

Optima Batteries Starting Redtop Marine Battery

Review

This Optima model acts as a start-up battery with 720 cranking amps. Its 90-minute reserve capacity is more than enough for most boat users, and it can start up your engine in most conditions. This battery is also very durable and vibration-resistant, making it a perfect unit for those who just want something to start their boat’s motor.

Notable Features You Need To Know About:

  • Start-up type
  • 720 cranking amps
  • Will start in most conditions
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6. Optima Batteries Dual Purpose YellowTop Marine Battery

Optima Batteries Dual Purpose Yellowtop Marine Battery

Review

If you want a smaller version of Optima’s BlueTop, its smaller brother, the YellowTop, is your best bet. Much like it’s bigger relative, it has a dual function of powering your devices with 12V and acts as a start-up with 620 cranking amps for your motor. It can start up in virtually any weather and has 98-minute reserve capacity. Finally, it’s also durable and vibration resistant, like all Optima-made batteries.

Notable Features You Need To Know About:

  • Deep cycle and starting function
  • 620 cranking amps
  • Good reserve capacity
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7. AGM Marine Battery Deep Cycle VMAX857

Agm Marine Battery Deep Cycle Vmax857

Review

Being a lead-tin alloy battery, this AGM unit offers consistent performance along with a very long lifespan. So it will serve as a power source for your devices for a long time. This battery features a quick recharge and no maintenance requirements. On top of that, it also comes with a handle to offer extra portability. Finally, it’s also vibration resistant, which is necessary considering the environment it’s going to be used in.

Notable Features You Need To Know About:

  • Lead-tin material
  • Long-lasting and durable
  • No maintenance needed
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8. Optima Batteries Starting BlueTop Marine Battery Deep Cycle (D34M)

Optima Batteries Starting Bluetop Marine Battery Deep Cycle

Review

This BlueTop variant from optima is similar to the previous one except it features a more compact size and delivers a slightly lower 750 cranking amps. Being a dual-purpose battery, you don’t have to spend extra cash for another unit, and it’s 120-minute reserve capacity is more than enough for most boat owners.

Notable Features You Need To Know About:

  • More compact size
  • 750 cranking amps
  • 120 minute reserve capacity
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9. UPG Lead Acid Sealed Marine Battery

Upg Lead Acid Sealed Marine Battery

Review

This UPG unit comes in 75Ah or 35Ah options to suit your power needs. It also uses the 12V standard that can power most devices. Being more light and compact than most marine batteries, this model is perfect for smaller vessels that need power.

Notable Features You Need To Know About:

  • 75Ah and 25Ah options
  • Compact and portable
  • Standard 12V
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10. Optima Batteries Marine Battery BlueTop (34M)

Optima Batteries Marine Battery Bluetop

Review

This Optima battery is a start-up type that uses 800 cranking amps to start-up the engine. It comes with a 100-minute reserve capacity that can give you consistent performance all-throughout. And like its brothers, it can start even during bad weather. It’s also durable and vibration-resistant, perfect for rougher boating expeditions.

Notable Features You Need To Know About:

  • Start-up type
  • Good reserve capacity
  • Vibration-resistant
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Buyer’s Guide – Choosing The Right Marine Battery For Your Boat

Best Marine Battery ReviewsHere’s all you need to know about choosing the right marine battery for you.

Amp-hours

The Ah rating of batteries will determine how long they last with each charge. Ah stands for ampere-hour, the time in which a battery fully discharges. Generally speaking, having a larger Ah is better, but it depends on the use. If you don’t have many devices on your boat, consider getting a battery with less Ah instead of wasting money on a more expensive unit.

 Reserve Capacity

This essentially acts the same as Ah, except it uses different units. This refers to the minutes that a charged 12V battery can give 25A at 10.5V until V decreases. To put it simply, a higher reserve capacity means that your battery can perform for more prolonged periods per charge.

Durability

Batteries need to be resistant to physical altercations because their acidic interior can be hazardous if they seep out of their exterior. A boating environment is full of shock and vibrations, so marine batteries need to be resistant to both. Most manufacturers use ABS plastic for their battery’s outer shell, being a very durable material that can withstand plenty of punishment.

Starting or Deep Cycle?

Deep-cycle type batteries run at consistent and low levels of power that’s suited for powering your boat devices. Most of these batteries use a standard 12V, and a higher Ah is often better because of they last longer per charge. Starter batteries are used to power up your motor initially. For this kind of battery, you should take note of its cold cranking amperage, which determines its efficacy in starting engines.

Cold Cranking Amperage (CCA)

This measures your battery’s starting power. Bigger motors require higher CCA. For more specific details, check the specs of your engine online and look for its CCA requirements. But generally, a 700CCA battery can start most motors on mid-sized vessels.

Maintenance

Batteries nowadays require no maintenance. Units created for marine use are made from Absorbent Glass Mat or AGM. These batteries are stronger and more durable compared to older battery models, and what’s best is that they need no maintenance. Always check the owner’s manual of your battery to see if it has maintenance and long-term storage requirements.

Size

You don’t want to buy a battery only to find out that it’s too big for your vessel. Always check the necessary dimensions before you lock in your purchase. Normally, larger batteries offer better performance, so if you’ve got the space, it’s a good choice to invest in a bigger model.

Type

  • AGM batteries

These batteries are costly, and for good reason. They offer the best performance, durability, and they require no maintenance. If you’re looking for a good investment that will offer you top performance for a long time, you should opt for an AGM battery.

  • Gel batteries

Being made from a blend of acid, water, and silica, which creates a gel-like substance that has fewer chances of leaking compared to flooded batteries. This is a good median between AGM and Flooded units, offering a decent price range with little maintenance required.

  • Flooded batteries

If you want something a lot more affordable, you can opt for flooded batteries. However, the maintenance can be taxing, and it isn’t really suited to high-vibration environments, which is why you’ll never see marine batteries of this type.

Frequently Asked Questions

Here are questions frequently asked about the best boat batteries.

Q: What is a marine battery’s standard lifespan?

A: This depends on your treatment of the battery as well as the battery type. Lead-acid units typically last 2 to 3 years if cared for properly. AGM batteries boast far longer battery lives compared to the other models, and they’re made to withstand severe conditions. So with a little bit of care, an AGM battery will last you a long time.

Q: Can you start up your boat’s motor with a deep-cycle type battery?

A: If your battery has enough amperage, then it can potentially be used to start up a motor. However, we advise against this because it won’t be suitable for the battery. Instead, you should invest in a dual-purpose battery that can do both functions.

Q: How will I know if I need a battery change?

A:  Here are a few key signs to take note of so you don’t mistake a failing battery for anything else.

  • Having to give your battery a jump start is a big sign that it needs replacing. Double-check its parts because it could simply be a faulty connection somewhere. Otherwise, it might mean battery failure.
  • If you’re having trouble starting your motor, it could mean a battery problem. For example, if your battery could once start the motor during cold weather, but it can’t, which means that it’s CCA is getting weaker.
  • Connected electronics are cutting out or dimming down.
  • The battery runs out of charge quickly.

Q: What is a standard discharge rate for a marine battery?

A: A battery will discharge gradually until it can power your devices any longer. The discharge rates of units vary, being dependent on a variety of factors. Generally, batteries discharge between 2% and 20% every month. Here are the factors that will influence your battery’s discharge rate:

  • Battery age
  • Battery type (Where AGM units have a much slower discharge)
  • Temperature conditions

As mentioned previously, AGM batteries will offer better performance compared to the other types, and this includes the discharge rate. If you think about it, AGM batteries will actually cost you less in the long run because they have longer lifespans, and you’ll be getting their top-of-the-line performance to boot.

Q: Is discharging or overcharging bad for the battery?

A: Yes. Both will have potential consequences for your battery. Overcharging will result in a change of the battery’s internal composition if done regularly, and it will gradually lessen the unit’s capability. Discharging will reduce a battery’s lifespan, or worse, it will stop working entirely. It can be very taxing to monitor your battery, but you should check it once in a while to keep it at optimal levels for most of the time.

Q: Does a high reserve capacity equate to better battery quality?

A: No. Not necessarily. The reserve capacity of a unit is essential, and its often used as an indicator for a battery’s performance. However, you need to look at the other features as well. Does it have a decent CCA and Ah rating? These figures have to be considered and taken into account to give you a clearer picture of a battery’s level of quality.

Conclusion

We hope that our guide has armed you with sufficient information to make a better marine battery purchased that’s perfect for your needs and preferences. A low-quality battery is a potential problem, especially in the long run, and taking the extra time to look for the best unit is well worth the effort.