Best Marine Battery to Take on Your Next Fishing Trip

Without a marine battery, you can forget about running a sizable boat. True enough, a marine battery is one of the essentials for every fishing enthusiasts. Sometimes, you even need two of them – one with enough amps to power the boat’s engine and the other to power the appliances on the boat.

Optima OPT8016-103 Batteries D34M BlueTop Starting and Deep Cycle...

If you own a boat or any water vessel, you will need at least one type of marine battery.

However, choosing the best marine battery for your fishing needs can be downright tricky – especially with the number of options out there.

Lucky for you, we are here to help.

For this post, we have reviewed some of the top-rated marine batteries that money can buy. Plus, we have written a brief guide on how to shop for marine batteries.

How We Chose Our Ratings

As mentioned, shopping for a marine battery can be a confusing affair. That’s why we always strive to be informative, accurate, and honest when making our recommendations.

Shortlisting the best marine batteries available was no easy task. We have spent many hours of research and testing to ensure that we recommend the batteries that are actually worth your time and money. We have also considered several factors like quality, features, brand, and price when making this list. As per usual, user reviews and feedback were taken into account as well.

Hopefully, this buyer’s guide will help you choose, not necessarily the best marine battery, but the most suitable battery for your boat or marine vessel. Let’s jump right to it!

Top 5 Best Marine Battery Models

After many hours of research and testing, we’ve come up with the selection of the top-rated marine batteries to power your fishing boat.

Optima OPT8016-103 Batteries D34M BlueTop Starting and Deep Cycle...
  • 12-Volt, 750 Cold Cranking Amps, Size: 10 inches x 6 7/8 inches x 7 13/16 inches tall, Weight: 43.5 pounds, Dual SAE &...
  • Optimal starting power even in bad weather
  • Mountable in virtually any position. Works well as a boat battery or RV battery
  • Weight: 43.5 lbs
  • Dimensions: 10 x 6.88 x 7.8 in
  • Voltage: 12 volts
  • Capacity: 55 Ah C20
  • Cold Crank Amp (CCA): 750
  • Key Features: 750 Cold Cranking Amps, Dual SAE & 5/16 inches Stainless Steel Stud Posts, Reserve capacity of 120 minutes, 15x more resistant to vibration

The Optima Batteries 8016-103 D34M is a dual-purpose marine battery. First, it powers the engine with 750 cold cranking amps and guarantees continual operation for the appliances on the boat.

The battery features a 5 Ah C20 battery capacity which should be plenty enough for most boats. One of the key features that I really enjoy is that the battery is very resistant to vibrations which means that it can withstand shakes and impacts without losing any power. It also weighs a little bit over 40 pounds, making it easy to mount even during rougher seas.

The 12-minute reserve capacity is excellent which could run a trolling motor or other appliance for a good deal of time whenever the boat engine cuts mid-way and a trolling motor is required.

This is an absorbent glass mat (AGM) battery type which is good because it requires little to no maintenance. However, be wary not to overcharge it as it could easily result in damage. Optima provides a two-year warranty for this product.

Odyssey 31-PC2150S Heavy Duty Commercial Battery
  • Cold Crank Amp (CCA)- 1150; Better warranty: Limited 3 and 4 year full replacement warranty – not pro rata; Longer...
  • Longer cycle life: 70 percentage longer cycle life compared to conventional deep cycle batteries, up to 400 cycles at 80...
  • Faster recharge: The highest recharge efficiency of any sealed lead battery on the market, capable of 100 percentage...
  • Weight: 77.8 lbs
  • Dimensions: 16.6 x 11.1 x 12.3 in
  • Voltage: 12 volts
  • Capacity: -
  • Cold Crank Amp (CCA): 1,150
  • Key Features: Longer cycle life, Vibration resistance, Extreme temperature tolerant, Reserve Capacity is 205 minutes

Now, we move on to something more powerful. The Odyssey 31-PC2150S Dual Purpose Battery is a highly-sought battery, thanks to its massive starting power.

Like the Optima battery, the 31-PC2150S also features a dual-purpose profile, making it a highly versatile product. You can use this battery to start boats, golf carts, and recreational engine. On top of that, it’s also good for deep cycling applications like running onboard equipment like fish finders, GPS systems, and more.

It’s a heavy-duty battery that can handle the toughest tasks even under less than favorable conditions. The impeccable design enables the battery to resist rapid vibrations and extreme temperatures. These two elements are the most common causes of premature cell failure, so you can rest easy knowing that you have a tough battery on your hands.

Maintenance is kept at a minimum due to the recombinant technology which eliminates the need for refilling. This product is backed with a 4-year warranty plus 3-10 years of service life.

VMAXTANKS VMAX V35-857 12 Volt 35AH AGM Battery Marine Deep Cycle HI...
  • Dimensions: L=7.7" W=5" H=6.1"
  • Also avilable as a battery kit:
  • Heavy Duty Grids: VMAX heavy duty lead tin alloys provide an extra margin of performance and service life in either...
  • Weight: 25 lbs
  • Dimensions: 7.7 x 5 x 6.1 inc
  • Voltage: 12 volts
  • Capacity: 35Ah
  • Cold Crank Amp (CCA): 330
  • Key Features: Heavy Duty Grids, Maintenance Free Operation, Resistance to shocks and vibrations

The VMAXTANKS VMAX857 AGM Battery is a deep cycle marine battery with a decent 35Ah capacity. Again, this is an AGM type which means that maintenance will be kept at a minimum. Plus, it is available for a good price.

The makers of the battery used a specialized physical and chemical structure for the construction of the plates. This results in a stronger performance and overall reliability. For instance, the battery is housed in a tough tank that is highly resistant to vibrations and shocks. You’ll appreciate this toughness once you’re out in the water and the going gets tough.

In cyclic use, the VMAX857 is able to recover to full capacity with a 60% regular depth of discharge. In case you don’t know, this means a longer service life. In float mode, you can easily get 5-8 years of lifespan.

For charging, you can use any quality AGM charger but I would recommend the same brand’s VMAX BC1204 12V 3.3 Amp charger.

Optima Batteries 8040-218 D35 YellowTop Dual Purpose Battery
  • 12-Volt, 620 Cold Cranking Amps, Size: 9 5/16" x 6 13/16" x 7 5/8" tall, Weight: 36.4 pounds, SAE Post,.300+...
  • 98 minutes reserve capacity for constant performance
  • Optimal starting power even in bad weather; the positive or red terminal is located to the right
  • Weight: 36.4 lbs
  • Dimensions: 9.38 x 6.75 x 7.69 in
  • Voltage: 12 volts
  • Capacity: -
  • Cold Crank Amp (CCA): 620
  • Key Features: Dual-purpose AGM battery, 98 minutes reserve capacity, C20 Capacity - 48 Ampere hour, 300+ discharge/recharge cycles

The Optima 8040-218 D35 Dual Purpose Battery is another dual-purpose maritime battery type that targets large loads. However, it is also designed for repeated, regular use, thanks to its 300+ discharge/recharge cycles.

This 12V battery provides a solid 620 cold cranking amps. It’s not as capable as other Optima’s blue-topped batteries but it offers its own set of features. For instance, the 300+ discharge and recharging cycles cater to those who need this sort of feature.

The 98-minute reserve capacity will not blow anyone’s mind but it is decent enough for an “all-around” marine battery. This is a very capable maritime battery which is best suited for small to medium sized outboard motors.

As with most Optima batteries, the 8040-218 D35 uses the patented Spiral Cell technology and construction which ensures that it can handle shocks and vibrations 15x better than other brands. Even the most turbulent seas won’t pose a threat.

The battery weighs on 36.4 pounds, making it one of the lightest batteries in this category. It is also quite compact which is good if you have a limited mounting space.

Odyssey 31M-PC2150ST-M TROLLING Thunder Marine Dual Purpose Battery
  • Cold Crank Amp (CCA)- 1150. Better warranty: Limited 3 and 4 year full replacement warranty: not pro rata; Longer...
  • Longer cycle life: 70 percentage longer cycle life compared to conventional deep cycle batteries, up to 400 cycles at 80...
  • Recharge: Highest recharge efficiency of any sealed lead battery on the market, capable of 100 percentage recharge in...
  • Weight: 71 lbs
  • Dimensions: 16.8 x 11.1 x 11.9 in
  • Voltage: 12 volts
  • Capacity: 100Ah
  • Cold Crank Amp (CCA): 1,150
  • Key Features: Longer cycle life, Vibration resistance-design, Highest recharge efficiency, 3-10 years of service life, Extreme temperature tolerant

The Odyssey 31M-PC2150ST-M Thunder Marine Dual Purpose Battery is yet another quality offering from the Odyssey brand and it’s also the most expensive battery on this list.

This battery has 1,150 cold cranking amps which are beastly and should have no problem starting up hungry engines in the most reliable way. You can rely on its rapid recovery and extreme durability that will stand up to the most turbulent of waters or the harshest weather. The battery also boasts a sealed design that prevents leaks and spills and enables you to use the battery in any position.

This battery has the most recharge efficiency out of all the batteries we’ve tested. The battery recovers at a tight speed even after 400 cycles of 80% depth of discharge.

The battery comes with a 4-year warranty plus 3-10 years of service life which means that you’ll be using this for quite a long while. It’s expensive but it’s definitely worth the asking price.

Buyer’s Guide

When buying the best marine battery, there are several things that you should keep an eye on. Here are a few features that should understand before making a purchase:

Cold cranking amperage – the cold cranking amps or CCA is the measurement at what the battery can deliver with a full charge over a 30 second period at a 0-degree Fahrenheit temperature. This means that the higher the CCC rating, the more powerful the battery at starting an engine. There’s also the marine cranking amp or MCA which is alternative rating at 32-degree Fahrenheit.

Reserve capacity – this is the set measurement for a battery that’s charged 100%. This is quite straightforward as the higher the reserve capacity, the longer the battery can operate between charging cycles. So go for a marine battery that has more reserve capacity than you think you would need since the capacity tends to degrade over time.

Size and maintenance – most modern marine batteries are AGM which makes them leak-proof and requires little to no maintenance. Better AGM batteries are water and weatherproof. There older type lead-acid batteries but you need to get inside to perform some maintenance. Size is only an issue if you have a smaller boat. These days, there are plenty of marine batteries that are small in size but still has a high capacity.

Brand – normally, I won’t judge the battery based on the brand but this is the case of getting what you paid for. A battery with a cheap price tag might be attractive but I would stay away if it’s not from a reputable brand or it has poor customer reviews. You need a marine battery that you can rely on, so you can’t really afford to go for a cheaply-made product coming from an unknown company.

A marine battery is pretty much the lifeblood of a boat or any other marine vessel.

While it’s tempting to go for the cheapest battery that you can find, you have to remember that if the battery fails, you can’t start the boat and power up the appliances. This is why you need the best marine battery that your budget will allow you.

I hope that this guide has helped you find the suitable battery for your boat.

So what do you think of our list? Any other marine batteries that I should have included? If you have any questions or suggestions, sound off in the comment section.

Janice Friedman

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