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Author: William Kerner
Date: November 9, 2021

Best Marine Battery - Top 5 Reviews and Buying Guide 2021

As their name suggests, marine batteries are used to power boats and water vehicles of various sizes. Needless to say, picking a particular option should only be done after careful considerations of all the variables at play. In this article, we will outline the essential features of these batteries and we will help you choose the best marine battery that is available on the market today.

Best Marine Battery Buying Guide

If you want to get the highest amount of value for your money, you need to make sure that the marine battery you opt for has several essential qualities that guarantee its performance and functionality. Here is a brief overview of the main factors that you should keep in mind when you are looking for a new marine battery.

The capacity

As it is the case with any type of battery, the capacity is one of the first variables that you should Consider. It refers to the number of amperes that the battery can produce in an hour and it is represented in Ah. Batteries with high capacity will allow you to operate your equipment and devices for longer periods of time.

The discharge rate

The capacity of the battery is not the only factor that determines its life. In fact, the discharge rate is almost just as important. It indicates the rate at which the battery is discharged relative to its output. Generally speaking, you should opt for a battery that has a discharge rate of around 60%.

The weight

This is a critical factor that you should be aware of. While the specs and performance of the battery should be prioritized, you don’t want them to come at the expense of portability. Units that are too bulky and heavy will be difficult to carry and transport, which could put a damper on a lot of your outdoor activities.

Cold cranking amps

The CCA is the starting power of the battery. It indicates the amperage that the battery can deliver at a cold temperature of 0 F. The optimal CCA rating is typically around 500, and anything below 300 is where you will have trouble starting the engine. In order to make sure that your battery has the ideal cold cranking amps, check the CCA value that is indicated in the specs of your engine and get a battery that has a comparable rating to it.

Reviews of the best marine batteries in 2021

1 - UPG 85980/D5722 Sealed Lead Acid Battery

Sale
UPG 85980/D5722 Sealed Lead Acid Battery (12V; 35 AH; UB12350)
458 Reviews
UPG 85980/D5722 Sealed Lead Acid Battery (12V; 35 AH; UB12350)
  • Used in UPS backup systems, spotlights, flashlights, exit lighting & other equipment
  • This item is not for sale in Catalina Island
  • 35 Amp hours

The D5722 is one of the best deep cycle batteries on the market, so it is only natural that we start our list with this high-performing unit. It employs the latest cutting-edge absorbent glass mat technology and it is extremely effective in delivering a steady performance. This battery is rated at around 35Ah and also comes in a 75Ah version.

A major component of this device’s quality is its heavy-duty case. It is completely sealed and it is designed to withstand impact and exposure to various elements. Moreover, it has very low maintenance requirements and it is not affected by vibrations.

The level of performance that you can expect out of the UPG D5722 is significantly higher than what other similarly-priced competitors are capable of offering. It delivers around 1,200 cycles at a rate of discharge that exceeds 30%. Storage wise, it boasts less than 3% of self-discharge and it has the capacity to retain more than 64% of charge after a full year.

For such an affordable option, all the features that you would like to see in a good marine battery are included. Whether it is the corrosion-resistant case, the compact design, or the wide operating temperature range, the UPG 85980/D5722 packs a lot of quality for a very reasonable price.

Pros

  • The price is great Considering the number of features
  • The design is one of the lightest and most compact ones on the market
  • The battery has a good lifespan
  • The case is extremely durable and highly resistant to impact
  • The operational temperature range is fairly wide
  • It employs absorbent glass mat technology

Cons

  • The terminals feel a little bit flimsy
  • The packaging of the unit is rather poor

2 - VMAXTANKS VMAX V35-857

Sale
VMAX V35-857 12 Volt 35AH AGM Battery Deep Cycle High Performance Group U1 Battery Compatible with...
53 Reviews
VMAX V35-857 12 Volt 35AH AGM Battery Deep Cycle High Performance Group U1 Battery Compatible with...
  • Dimensions: L=7.7" W=5" H=6.1"
  • Heavy Duty Grids: VMAX heavy duty lead tin alloys provide an extra margin of performance...
  • Maintenance Free Operation: There is no need to check specific gravity of the electrolyte...
  • RECOMMENDED CHARGER: VMAX BC1204 12V 3.3Amp

This is another great deep cycle marine battery that is packed with a number of interesting features. Like the UPG that we reviewed above, it has a capacity of 35Ah and boasts a sturdy Construction that allows it to last for a very long time. More importantly, it does not require any expensive maintenance and its performance never dips below optimal levels. To ensure that the case is durable and sealed, the manufacturer relies on an efficient design that utilizes AGM technology. The result of this is a solid unit that is just as durable as it is high-performing.

On top of its amazing durability and sturdiness, the battery’s lightweight and slim design make carrying it very easy and convenient. Furthermore, its capacity to effectively eliminate shocks and vibration coupled with its ability to operate in any position gives it a lot of versatility.

The long lifespan of the VMAX V35-857 is another aspect that is worth praising. It can last of up to 8 years in float mode and it has the ability to recover full capacity with a discharge of around 60%. At this price range, it will be hard to find an alternative that can match these numbers. As for its performance, it can power a decent-sized trolling motor for up to 9 hours with a depth of discharge of 50%.

Pros

  • It can last up to 8 years in float mode
  • The solid case is Constructed using AGM technology
  • It reduces shocks and keeps vibrations to a minimum
  • It can power a mid-sized trolling motor for up to 9 hours
  • It is easy to use and carry

Cons

  • It does not come with enough instructions
  • Some important metrics are missing in the technical data section

3 - Optima Batteries 8006-006-FFP

Don’t a let the colorful and unassuming design of this battery fool you. This is a highly durable unit that offers a high level of performance that is required for powering large motors. Thanks to its high capacity of 50Ah and 100 minutes reserve, the Optima is capable of running a wide range of motors with little effort. The efficient combination of AGM technology and spiral battery cells is another factor that adds to the great performance of this high-end unit.

As you would expect from models at this price, the Optima employs a smart precision-controlled design that contributes to increasing the number of recharges that the battery offers. This is the main reason why it is capable of providing up to three times the number of recharges that a mid-range battery can deliver. The low resistance is another quality that should be highlighted. This characteristic results in a more efficient managing of power output and it is also responsible for boosting the recharge times.

As far as high-end options are concerned, the Optima 8003-006-FFP ticks all the required boxes. Its Consistent performance, smart design, impressive versatility, and convenient portability make it a top pick at this price range.

Pros

  • This battery is capable of powering large-sized motors with relative ease
  • It combines AGM technology and spiral battery cells for a superior performance
  • It employs a precision-controlled design that boosts the number of recharges
  • Its low resistance enables it to manage power output in an efficient manner
  • It is light and compact which allows for a more convenient portability

Cons

  • It does not come with the two nuts that are needed for hooking up electrical wires
  • The price is not ideal for people on a tight budget

4 - Odyssey 34M-PC1500ST

Sale
Odyssey 34M-PC1500ST TROLLING Thunder Marine Dual Purpose Battery
85 Reviews
Odyssey 34M-PC1500ST TROLLING Thunder Marine Dual Purpose Battery
  • Cold Crank Amp (CCA)- 880; Better : Limited 3 and 4 year full replacement - not pro rata;...
  • Longer shelf life: Can be stored on open circuit without the need for recharging up to 2...
  • Vibration resistance- design protects against high impact shock and mechanical vibration;...
  • Totally maintenance free: No need to add water, ever Improved safety- US Department of...

This is another great high-end option in this list. This battery was manufactured by Odyssey, one of the most established entities in the space. The 34M-PC1500ST is a dual purpose marine battery that is characterized by a high capacity as well as a high cranking power. While it might be slightly more expensive than the average marine battery, it is essential to remember that its performance and durability make it worth the asking price.

Like all product from Odyssey, this unit is the result of fine and immaculate engineering. The AGM technology is specifically used in order to regulate power output and reduce battery dry-out. Furthermore, the battery is Constructed in a way that enables it to handle vibrations and high cycling operation.

The performance of this battery is excellent, to say the least. It boasts a reserve capacity of over 200 minutes and its maximum power reaches the 100Ah mark. It is mostly suited for mid-sized motors but it is still capable of powering some large ones in optimal conditions. You can expect a little less than 5 hours of continuous operation when you are using it with mid-sized trolling motor and around 1,000 cycles at a depth of discharge of 60%.

Pros

  • It boasts a high capacity and cranking power
  • The battery is remarkably sturdy and durable
  • The lifespan of this unit is one of the longest on the market
  • It can power mid-sized motors for up to 5 hours in optimal conditions
  • It is backed by a generous 2-year warranty
  • It is adept at handling strong shocks and vibrations

Cons

  • The parking drain is relatively low for such a pricey product
  • The manual does not include some essential instructions

5 - Exide XMC-31 MEGACYCLE AGM-200

The final item in our list is another dual-purpose marine battery that is just as versatile and high-performing as the other models that we reviewed in this article. The specs of this battery are some of the best on the market, with a CCA of 925 at 0 degrees, a 200-minute reserve, and a capacity of around 100Ah, the Exide XMC-31 stands out as a worthy investment despite its relatively high asking price.

The performance that you can get out of this model is good enough to power a wide range of motors. This includes both mid-sized trolling motors and smaller outboard motors for various types of boats. You can expect around 1,000 cycles with a depth of discharge of 50% to 60%. But the biggest selling point of this model is probably its unmatched lifespan. In float mode, it can last for more than 10 years, a figure that is unique in the space.

When it comes to performance and durability, the Exide XMC-31 is easily the best marine battery below the $500 mark. However, the trade-off is its high price as well as the relative bulkiness and heaviness of its design.

Pros

  • It can power trolling and outboard motors in a very effective manner
  • It delivers around 1,000 cycles with a decent discharge rate
  • The battery can last for up to 10 years in float mode
  • The case is durable and it is resistant to all sorts of impact
  • The dual terminal design allows for easy installation and multiple applications

Cons

  • The unit is quite bulky and heavy which significantly reduces portability
  • The value to price ratio is not the best at the high-end range

Final thoughts

Even if you are a newcomer to the world of marine equipment and accessories, picking the best marine battery does not have to be an overwhelming task. Make sure to familiarize yourself with the basic features of these batteries and go over the reviews several times so that you can make an informed purchase decision, also consider reconditioning the old battery to make it like new again, however it requires some knowledge and practise.

Last update on 2021-12-02 / Affiliate links / Images from Amazon Product Advertising API

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