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Up to date Jan 13, 2023 3:56 PM

Marine batteries are the unsung hero of the boating world. Simply as boaters will exit of their solution to discover ethanol-free gas and components to maintain their outboard working at peak efficiency, anglers will go to excessive lengths to maintain the ability flowing to their electronics and electrical trolling motors. For these of us who continually look to improve our angling expertise, a top-notch energy financial institution is simply as necessary as the fashionable instruments it helps.

Like all merchandise, the market is flooded with a wide range of marine batteries. A few of these are higher than others. I waded by way of the ocean of batteries to search out those price having. Listed below are the perfect marine batteries to maintain your fishing boat going so you’ll be able to consider what actually counts: catching fish.

How We Selected The Greatest Marine Batteries

As a ship proprietor for the final 30 years, I’ve had the chance to fish on a weekly foundation with a wide range of flooded lead acid cells and sealed AGM batteries. Along with my private expertise with lead acid batteries I’ve consulted many aggressive bass anglers who’ve taken the plunge into lithium battery expertise. These decisions are based mostly upon my analysis with these anglers in addition to my private experiences buying and fishing with these battery types.

The Greatest Marine Batteries: Evaluations & Suggestions

Greatest for Trolling Motor: Odyssey Excessive Trolling Thunder

Greatest for Trolling Motor

Why It Made the Minimize: These overbuilt AGM deep-cycle cells will ship most energy to your trolling motor for years with as much as 400 discharges earlier than they trace at slowing down.

Key Options

  • Group 31 AGM
  • 92-amp hours
  • 67 kilos


  • Rugged Building
  • Wonderful lifespan
  • Good efficiency at decrease cost ranges


  • Costly for a lead acid AGM battery
  • Heavy

Odyssey Marine AGM batteries are constructed particularly to deal with the repeated discharges of anglers who spend many days per week on the water. Whereas not as extremely touted by skilled anglers as lithium batteries, these stowaways are discovered within the energy banks of many fishing guides who cost and deplete their batteries on a close to every day foundation. The batteries are a bit heavier than different AGM marine batteries, however that weight comes from the business heavy-duty development that helps these energy packs fend off a number of the beatings that working at full velocity in tough water can dish out.

Bigger than regular cell sizes and pure lead plates provide extra capability as properly, that means you’ll be able to spend extra time on the water earlier than you start to note any battery fade within the trolling motor prop or see voltage drop. These batteries are a number of the most costly AGM’s available on the market, however most anglers we talked to have praised the worth as cash properly spent.

For much more decisions, try our roundup of prime trolling motor batteries.

Greatest Twin Function: Optima Blue High

Greatest Twin Function


Why It Made the Minimize: Don’t let the modest specs idiot you, these “blue topped beasts” pack extra punch than most absorbed glass mat choices in the identical dimension class.

Key Options

  • Group 31 AGM
  • 75-amp hours
  • 61 kilos


  • 900 chilly cranking amps
  • Extraordinarily immune to vibration and tough therapy
  • Lengthy lifespan


  • A bit gentle on the listed capability

Though it’s listed as a gaggle 31 battery, the Optima Blue High really has the identical dimensions as most 27 group batteries, making it a straightforward improve for anglers searching for a little bit extra juice with out rearranging their boat’s battery compartment. Optima additionally appears to be a bit extra conservative than different battery producers in terms of itemizing their batteries’ capacities. Though they listing the 31M at 75-amp hours, in-the-field efficiency of those batteries far exceeded many rivals’ fashions that listing at 80-amp hours and above. The AGM design of Optima batteries consists of separate coiled cells with fiberglas mats, making them 100% spill proof, even in the event you mount them on an angle or on their aspect.

This dual-purpose battery additionally pumps out an astonishing 900 chilly cranking amps, which can provide ripcord-like efficiency on the starter on just about any dimension outboard an angler is more likely to have his or her boat. Whereas it’s at all times finest to have separate batteries for the trolling motor and outboard, this battery might simply pull double-duty for anglers ought to their major beginning battery resolve to die at a nasty time. Whereas Optima might have been seen as costly 20 years in the past, their continued observe file and prolonged lifespan has confirmed itself to be properly price the additional cash over flooded cell batteries. And, it’s a mid-priced battery in right now’s market.

Greatest Lithium: Tracker Marine Lithium

Greatest Lithium


Why It Made the Minimize: With lithium batteries being the brand new children on the town, Tracker presents as near an entry-level expertise within the class with specs that examine to a lot pricier choices.

Key Options

  • Group 27 Lithium Iron Phosphate
  • 80-amp hours
  • 23 kilos


  • Quick recharge time
  • Low weight
  • Extraordinarily lengthy lifespan


  • Not good for twin function use
  • Lifespan might not be price excessive price

Whereas lithium marine batteries are nonetheless of their infancy, the Bass Professional Retailers Tracker Marine model has undoubtedly embraced the expertise, providing a wide range of lithium batteries produced by RelION expertise. Whereas different manufacturers have additionally contracted with the corporate, Bass Professional Retailers appears to have the perfect present value for comparable fashions. Along with a lifetime boasting greater than 5,000 discharges, these batteries provide a good capability of 80-amp hours. Nevertheless, anglers could also be pleasantly stunned that they are going to see an extended interval of high-power output, as these batteries carry out a lot in another way than lead acid cells.

Whereas lead acid will slowly lose effectivity as they’re discharged, lithium batteries present near the identical discharge fee till they’re practically gone, giving the person extra time at peak energy. And as a substitute of needing a full evening to recharge after being depleted, this battery will energy again up in as little as an hour and a half after a full discharge. The true query to ask is whether or not you actually fish sufficient to maintain up with this battery’s potential. In any case, 5,000 discharges are equal to fishing each day of the yr for greater than 13 years! A weekend warrior might by no means see the financial savings.

Greatest for the Cash: Duracell Marine DC27M

Greatest Battery for the Cash


Why It Made the Minimize: Greenback for greenback, it’s arduous to beat a Duracell for the typical angler and weekend warrior. They’re not a “set it and overlook it” battery, however with the correct consideration, the Duracell DC27 will carry out admirably on your angling wants.

Key Options

  • Group 27 Flooded Cell
  • 90-amp hours
  • 53 kilos


  • Cheap
  • Strong efficiency with correct upkeep
  • Holds as much as deep discharges in addition to higher-priced manufacturers


  • Restricted lifespan
  • Upkeep and monitoring required

Name me a client, however I’ve simply grow to be accustomed to changing my batteries as soon as each three or 4 years. Even once I used AGM batteries, there was at all times a need to improve or exchange my outdated cells once they hit the four-year mark. As a median angler, I realistically common about 10 fishing journeys monthly, with spring and summer time seeing many extra journeys than colder months. With that in thoughts, I’ve settled on the truth that I personally get essentially the most bang for my buck out of Duracell deep cycle marine batteries. These batteries are made by Johnson Controls, the identical producer that produces most manufacturers, together with Walmart’s Everstart model in addition to AutoZone battery manufacturers.

The 90-amp hour-rating of the 27 group deep-cycle marine battery provides loads of energy to maintain the trolling motor turning, and I’ve by no means gotten lower than three years out of every battery. The battery does require monitoring, because the water within the battery’s acid answer will evaporate some if the battery overheats throughout charging. However, checking the water stage is so simple as popping the highest off every cell and visually inspecting it to ensure the lead plates are submerged in liquid. At lower than $100 per battery, you should purchase three of those batteries earlier than you attain the worth of a comparable AGM, and twice that earlier than you method the worth of a Lithium battery.

Issues to Take into account Earlier than Shopping for a Marine Battery

Electrical engineers might have designed right now’s top-quality batteries, however you don’t need to have a level to slender down your decisions. Listed below are a number of the elements of marine batteries consumers want to concentrate to earlier than pulling out the billfold and making a expensive mistake.


For many years producers had been content material with the usual flooded cell battery. Sealed batteries provided an enchancment over the originals, but it surely wasn’t till latest forays into electrical car design that battery producers got the motivation to develop batteries that had been lighter, held a cost quicker and lasted for 1000’s of discharges.

  • Flooded Lead Acid: The fundamental battery your father in all probability utilized in his automotive, boat, and every little thing in between, flooded lead acid batteries have lead plates suspended in sulfuric acid that retailer and discharge electrical energy. Their easy development makes them the least costly possibility for marine batteries, and so they have a tendency to carry up for 2 to a few years earlier than needing to get replaced. Homeowners of those batteries ought to periodically test the extent of the acid within the battery, as it may evaporate out throughout charging, leaving the lead plates dry. This damages the battery, making it much less environment friendly, and finally nugatory.
  • Absorbed Glass Mat (AGM): One step above the flooded cells, AGM batteries nonetheless use acid and result in react and retailer electrical energy. However the acid contained in these cells is soaked into fiberglas mats to stop it from sloshing round or evaporating when the battery is being recharged. These batteries are likely to final barely longer than flooded cells, however their primary benefit is that they require no upkeep.
  • Lithium Iron Phosphate: The newest expertise for the fashionable boat, Lithium iron phosphate batteries have many benefits over flooded lead acid and AGM batteries, equivalent to quicker recharge instances, much less weight, and for much longer lifespans. These big-time advantages, nonetheless, include a big-time price ticket, typically costing as a lot as 4 or 5 comparably sized commonplace batteries. However even with the upper value, many take into account these to be the perfect marine batteries.


Marine batteries, except for some specialty batteries to energy motors designed for kayaks and canoes, fall into certainly one of three sizes, labeled teams. Take note of how a lot room you have got in your boat’s storage space and be sure to don’t buy a battery that in the end received’t match the format of your cargo maintain.

  • Group Measurement 24: Usually reserved for beginning batteries that received’t be required to deal with bigger battery drains. Nevertheless, this battery group’s lighter weight and small dimensions makes it a favourite for small jonboats the place house is at a premium.
  • Group Measurement 27: The usual battery dimension for many bass boats for each the deep-cycle trolling motor batteries and dual-purpose beginning batteries that additionally run primary boat electronics, bilge pumps and lights.
  • Group Measurement 31: The bigger dimensions of this battery group can imply extra energy capability, however that capability comes at the price of weight and house. Many mid-sized boats might not have sufficient house to accommodate these massive energy cells.

You probably have a kayak that you just need to convert to energy, try our roundup of the perfect kayak motors. You can even outfit your vessel with one of many prime trolling motors as picked by our consultants. We even have a bunch of helpful suggestions for do-it-yourself outboard repairs to maintain your vessel ship-shape. Uncover Boating additionally presents some useful solutions on boat upkeep to maintain your time on the water trouble-free.


Batteries have three primary makes use of on a ship: beginning the outboard engine, fueling the electrical trolling motor or powering the entire bilge pumps, aerators, lights and electronics discovered onboard. As fish finders have grow to be bigger and extra superior, they require rather more energy than earlier flashers and primary graphs. Completely different makes use of name for various battery builds to get essentially the most of every energy cell stowing away in your boat.

  • Beginning Battery: Beginning batteries are designed with many skinny lead plates to maximise the floor space of the chemical response going down to launch saved electrical energy. The skinny plates provide sudden bursts of excessive vitality, however don’t maintain up properly to being drained too deeply then recharged.
  • Deep-Cycle Battery: The alternative finish of the battery spectrum from beginning batteries, deep-cycle batteries have fewer, however thicker plates suspended within the acid answer. This presents a decrease output of present, which permits the battery’s vitality reserve to final for much longer. The thicker plates additionally resist harm brought on by use, letting the person drain the battery’s energy a lot additional when working electrical gadgets equivalent to trolling motors.
  • Twin-Function Battery: Mister middle-of-the-road, the dual-purpose battery presents sufficient prompt energy to crank most outboards, but in addition has massive sufficient plates to deal with common discharges from electronics and aerators that will run all day.

For those who want a transportable battery pack to maintain your cell telephones or different electronics going, try our roundup of the perfect energy banks.


For many boating functions, capability will be measured in certainly one of two readings, relying upon the aim of the battery.

For beginning batteries, it’s all about instantaneous output, which is measured as Chilly Cranking Amps (CCA). So long as the beginning battery meets the CCA requirement of your outboard, it’ll carry out as wanted till it must be changed. There’s actually no have to spend more money on larger CCA batteries than what your outboard wants.

For dual-purpose and deep-cycle batteries, a battery’s amp hours can provide an excellent indication of its reserve. Whereas amp hours are literally a measure of how a lot cost goes into the battery throughout charging, it presents a relative quantity to check batteries of various sizes and kinds. For many trolling motors, batteries of 80- to 100-amp hours will present a full eight-hour day of use underneath regular circumstances. Preventing excessive winds and present can deplete batteries faster, chopping that utilization significantly.


Q: Do I really want a marine battery for my boat?

Marine batteries are designed to face up to the moist environments present in boat cargo areas in addition to the abuse pounding waves can deal out on a voyage. A boater would possibly be capable to get by with a battery meant for a automotive or different car kind, however that energy supply might undergo catastrophic failure from the acute environments the place anglers depend upon their gear. Decrease output charges can imply larger amperage attracts as properly, which might trigger harm to some marine electronics if used regularly.
Anglers utilizing a normal automotive battery to energy a trolling motor additionally might discover themselves wanting extra capability, as beginning batteries are designed to ship massive quantities of present in brief bursts, whereas trolling motors require decrease quantities of vitality unfold out over an extended time frame.

Q: Are you able to overcharge a deep-cycle battery?

Most fashionable battery chargers have safeties in-built to close off when a battery is absolutely charged, however it’s nonetheless doable to overcharge a deep-cycle battery. When the battery overheats, the water within the sulfuric acid answer inside its case will boil and escape, leaving dry lead plates behind, which sulfate and lose their capability. If the overcharging continues or the water isn’t changed, the battery could be a full loss.
Overcharging typically is the results of the person not selecting the proper setting on their battery charger. Whereas uncommon, a charger or battery maintainer’s failsafe can malfunction, so it’s at all times finest to regulate your charging standing and never rely too closely on the charger dealing with it for you.

Q: Which is best, AGM or lithium battery?

If cash had been no object, lithium batteries could be the apparent alternative over lead acid batteries. The lithium battery supplies extra energy with much less weight, an extended lifespan and a way more fixed energy output earlier than it turns into weak.
Nevertheless, all these advantages come at the next price. Whereas lithium battery prices are slowly reducing, they’re nonetheless a bit dearer than a lot of the AGM batteries available on the market.

Remaining Ideas on the Greatest Marine Batteries

The worth you expertise in a battery in the end relies upon upon the person and the way typically the battery is used. A lithium battery might permit as much as 10 instances the variety of discharges as comparable flooded cell or AGM batteries, but when the customer doesn’t use their boat and batteries on a weekly foundation, they could by no means use the batteries lengthy sufficient to offset the extra expense. Likewise, if a boater isn’t prepared to place within the further monitoring and upkeep commonplace flooded cells require, they could harm the inexpensive possibility, requiring common replacements.

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