Best Marine Batteries

Best Marine Batteries in 2020 for Rough & Tough Use

The fishing season is one of the most refreshing times of the year. However, it brings a lot of responsibility. When preparing for the fishing season, one must check all the tools they use – especially the boat. Having the boat ready for long days on the water is vital to enjoying the season and staying safe the first thing is having the best marine batteries with you.

Using the right battery is as much a matter of safety as it is a matter of performance and convenience.

Apart from the engine, the most critical component of the boat is the battery – and having marine battery will help you fire up the engine with ease, and power the appliances on board without any hiccups. 

Types of batteries:

Marine batteries are of different types: Starter batteries, Deep cycle batteries, and dual-purpose batteries.

  • Starter batteries: These are also called cranking batteries. Starter batteries discharge a large amount of energy in a short time.

    This makes starter batteries ideal for starting engines.

  • Deep Cycle batteries: These batteries release a small amount of energy over a long time.

  • Dual-purpose batteries: These batteries are capable of both deep cycling and starting engines.

    However, they perform weaker deep cycles than dedicated deep cycle batteries do.

Getting the right type of battery is not enough – you must also examine the battery for specific features.

Here are some traits of a good marine battery:

Best Marine Batteries
  • Good Ratings:

When shopping for a marine battery, looking at the battery’s reserve capacity and amp-hour rating will help you set expectations as to how long the battery will last you.

Better ratings translate to longer-lasting charges and a better life.

  • Minimal Weight:

A battery that’s too heavy can be a pain to maintain. Try and get as light a battery as possible.

  • Recent Manufacture:

With time, all batteries lose their effectiveness. A battery that has been on the shelves for over a year will not be as capable as a freshly manufactured battery.

Always look at the date of manufacture and try and get as fresh of a battery as you can.

Finding the right battery can be challenging, given the vast array of products available on the market.

To help you out, we’ve narrowed your options down to the seven best marine batteries available on the market. 

Let’s get started. 

Image & Ratings

Product Name & Features

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  • Capacity: 12V, 7Ah/9Ah/100Ah/200Ah
  • Weight: 100Ah - 66lbs; 200 Ah – 129lbs

The Renogy battery is an excellent choice if you’re looking for a battery that can store solar energy from the panels on your boat. It boasts a large 200Ah capacity.

  • Capacity: 12V,35Ah
  • Weight: 23.1lbs

The battery supplies dependable power and can be mounted at any angle. It charges quickly, and its compact size enables it to fit in small compartments.

  • Capacity: 12V,125Ah
  • Weight: 77lbs

The Vmaxslr125 is a durable battery that will last you well over eight years in float mode. It packs a lot of power and has a capacity of 125Ah.

  • Capacity: 12V, 70-85Ah (group 24 battery)
  • Weight: 45.9lbs

The M24AGM is one of the cheapest batteries on this list. However, it does not compromise on performance.

  • Capacity: 12V, 50-75Ah (group 34 battery)
  • Weight: 49lbs

This Odyssey battery has a Cold Crank Amp (CCA) rating of 880, which makes it one of the most powerful batteries on this list. It is ideal for boats with trolling motors.

  • Capacity: 12V,55Ah
  • Weight: 43.5lbs

It weighs lesser than the average battery, making it more comfortable to carry and install. The AGM chemistry gives you the flexibility of installing it in any way you please.

  • Capacity: 12V,55Ah
  • Weight: 43.5lbs

The Mighty Max ML35-12 is an affordable and effective option for those looking for a compact battery for a trolling motor.

The Renogy battery is an excellent choice if you’re looking for a battery that can store solar energy from the panels on your boat. It boasts a large 200Ah capacity.

It is a deep-cycle battery, which is best for supplying power to appliances on the boat. It can also be used as a starter battery. Coupled with the right battery, it is perfect for daily use in the fishing season. 

One drawback with this battery is that charging it requires a special charger. However, a smart charger will charge it too.

The battery is leak-proof and spill-proof, making it very low-maintenance. It is also shock and vibration resistant, which makes it particularly durable.

It can be safely discharged to a maximum of 50%. The manufacturer strongly advises against over-discharging these batteries, especially if they’re connected in series. It could permanently damage the batteries.

Pros
  • High capacity
  • Comes with two- year warranty
  • Maintenance-free operation
  • Value for money option
Cons
  • Very heavy
  • Difficult to mount
  • Requires special charger

It is an affordable and powerful battery well-suited for any boat.

The batteries are a popular option among boat owners because of their minimal weight and high portability.

The battery supplies dependable power and can be mounted at any angle. It charges quickly, and its compact size enables it to fit in small compartments.

It lasts long and can power the boats’ cabin lights and fans for an evening. Since the battery is sealed, there is no risk of leakage

The battery is also vibration-resistant, which significantly increases the battery’s life.

They can also alternatively be used in other vehicles, in lawnmowers, and can also power consumer electronics.

Pros
  • Compact form factor
  • Lightweight
  • Vibration resistant
Cons
  • Small capacity

The Vmaxslr125 is a durable battery that will last you well over eight years in float mode. It packs a lot of power and has a capacity of 125Ah.

It is a class-leading option that will supply reliable power when you’re out on the water. 

The large capacity makes it the perfect battery to power your boats’ lights and other appliances. Although it is a deep cycle battery, it’s high rating enables you to use it as a starter battery in emergencies

It is built with military-grade plates that ensure a long life-span and excellent performance. It can be temporarily submerged and still work since it is not a wet-cell battery. 

It is an AGM sealed battery, making it very low maintenance. 

The battery can be mounted sideways since it does not have any freely-roaming fluids. Never use this battery fully enclosed, since it can cause a buildup of explosive hydrogen gas.

Furthermore, it recharges very quickly and can resist shocks and vibrations on the boat, making it even more durable.

You can also opt to get a battery calculator. This device will help you determine the number of batteries you need on your boat to meet your power requirements.

Pros
  • 8 to 10 years of life in float mode
  • 12 months warranty
  • Fantastic quality – built with military-grade plates
Cons
  • Very heavy
  • Prone to overcharging

The M24AGM is one of the cheapest batteries on this list. However, it does not compromise on performance.

Although the battery does not have any wing nuts for connecting the cables to, they can be bought separately and installed.

The unit is quite compact – its measures are 7”x11”x7”. This makes it easy to fit, even if you don’t have much space on your boat. 

It comes sealed, which provides you with a lot of safety benefits when you are on the water. There is no need to worry about leaks either.

The M24AGM uses a valve-regulated gas recombinant technology, which gives it up to three times the life cycles a conventional battery would supply.

It has both screw terminals and top posts – which enables you to use it in a car if you need to. 

Since it is an AGM battery, it recharges fast and can be mounted any way you like without having to worry about damaging the battery. It supplies excellent deep cycle performance.

Pros
  • 18-month warranty
  • Uses valve-regulated gas recombinant technology
  • Leak-proof and maintenance-free
Cons
  • Does not come with wing nuts included

This Odyssey battery has a Cold Crank Amp (CCA) rating of 880, which makes it one of the most powerful batteries on this list. It is ideal for boats with trolling motors.

It is slightly expensive; however, this high-quality battery will last you at least ten years. It also boasts a longer charge cycle.

It’s high CCA rating makes it the perfect dual-purpose battery – and you can power both your engine and your appliances. It will keep running for a long time without a drop in voltage.

Odyssey supplies a four-year warranty, which gives you peace of mind about your purchase.

Another advantage is that the battery does not require any maintenance, and you don’t need to keep checking on it as much. It is an AGM battery, giving you a lot of mounting options.

It boasts the highest recharge efficiency of any sealed lead battery on the market. It also has a long shelf life and can be stored for two years without needing recharging.

The unit is heavy at 49lbs. However, it is sturdy and will never leave you stranded on the water.

Pros
  • High-quality build
  • CCA rating 880
  • Long warranty period
Cons
  • Pricey

The D34M is slightly cheaper than the Odyssey 34M. However, it offers similar performance. 

It weighs lesser than the average battery, making it more comfortable to carry and install. The AGM chemistry gives you the flexibility of installing it in any way you please.

The battery will hold up for the whole day when you’re out on the water, and you don’t have to worry about being stranded because the engine wouldn’t start.

It is lightweight, making it ideal for a fishing vessel. However, it is more than capable of handling larger loads, and will easily last for over 11 hours on a larger container. The battery is perfect for boats having trolling motors. 

The battery is durable – and will continue to hold power without significant drops in performance for years. It is spill-proof and can handle vibrations and shocks very well.

 It also charges quickly – plug it in in the night, and you’re good to go by dawn.

Optima’s D34M is a fantastic battery that will give you three times the average charge cycles. It comes with a one-year warranty.

Pros
  • Good price
  • Lightweight
  • Very durable
Cons
  • Relatively small capacity

The Mighty Max ML35-12 is an affordable and effective option for those looking for a compact battery for a trolling motor.

It is a robust battery, and regardless of how demanding the boat’s motor is and how fast you like to go, it will get you through a weekend of fishing without needing a charge. 

It boasts a compact size, measuring 7.68” x 5.16” x7.13”. It is also very lightweight, weighing 38.58lbs. The weight makes it ideal for powering smaller boats.

The AGM battery comes sealed, making it spill-proof and resistant to vibrations. It requires zero maintenance and can be stored at any angle, even in unventilated spaces. 

The ML35 has a wide operating temperature range, which makes it an excellent choice for year-round use. 

One drawback is that the battery does not come with mounting accessories or wire harnesses.

Overall though, the Mighty Max ML35-12 is the perfect choice for those looking for compact and powerful batteries.

Types of battery chemistries and their significance:

Batteries have different chemistries. Commercially available batteries come in mainly three chemistries: flooded, gel, and Absorbent Glass Mat (AGM).

  • Flooded batteries: Also known as wet batteries, these are the cheapest batteries available for boats.

Since they generate heat and gas when the chemicals inside react to produce electricity, they require frequent maintenance and must be topped up with distilled water. 

Flooded batteries cannot handle vibrations and shocks well, and must be strapped to stay in an upright position.

They also discharge much faster and need to be charged in the off-season to maintain the battery’s integrity.

  • Gel batteries: These are high maintenance batteries that can handle vibrations much better. They are very expensive for the performance they offer.
  • AGM batteries: Absorbent Glass Mat batteries come sealed and handle bumps and vibrations correctly. They require virtually no maintenance. 

They also charge faster and have low discharge rates.

AGM batteries dominate the current market because of the flexibility and durability they offer.

Use only a single type of battery across your boat. Mixing different battery types could cause undercharging or overcharging, which will damage the cells.

Battery Maintenance Tips:

Here are some additional steps you should take to ensure safer and longer battery operation:

  • Try and keep discharges as shallow as possible – it increases battery life. 
  • Don’t leave your batteries deeply discharged for too long – it will lower the battery’s capacity.
  • Never mix new batteries with old batteries.
  • Keep the terminals connectors clean to avoid loss of conductivity.
  • Check on fluid levels regularly in case you have wet-cell batteries.

Conclusion

The battery you pick depends on your requirements and your budget. This list highlights different kinds of batteries well suited for all circumstances. 

Going through Upfored list and tallying the batteries with your requirements makes finding the right battery for your boat very easy.

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