Best Trolling Motor Battery Reviewed (2021 Buyer’s Guide)

Lance Wilkins
Lance Wilkins
Editor @ CallOutdoors. Outdoor gear-head and adventure addict. I fish, camp and enjoy to writing about my adventures.

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There is nothing worse than getting to your boat and finding out that you can’t run your motor because your battery is flat, or the times you have to end your fishing time and paddle back home.

The best trolling motor battery will put an end to days like this giving you a consistent and reliable power source that’ll ensure you can fish whenever and for as long as you like.

Finding the best trolling motor battery isn’t so easy though.

There are loads of batteries to choose from and you have to decipher battery type and a lot of other technical information to find the best one for you, which is why I’m here to help – I’ve done the hard work, so you don’t have to.

The Best From The Review

Top Pick

Mighty Max Battery 12v

Sealed and maintenance-free battery that release its charge slowly, ideal for running your motor all day long.

Mighty Max Battery 12v

The best trolling motor battery is the Mighty Max Battery.

This trolling motor battery is an AGM deep cycle battery that you can run your trolling motor on all day thanks to the large amount of amperage hours, 100.

It’s durable, quick and easy to charge, and has small enough dimensions for you to fit it into any vessel.

It also comes with a 1-year warranty in case anything goes wrong with it.

Lightest Trolling Motor Battery

VMAX MR96-60 AGM High-Performance Battery

Specifically made as a trolling motor battery and can provide 24-50lbs of thrust to most electric trolling motors on the market.

VMAX MR96-60 AGM High-Performance Battery

The lightest AGM trolling motor battery is the VMAX MR96-60.

Weighing just 43 lbs, it’s 10-20 lbs lighter than other models and still has enough charge to run your trolling motor all day long.

Best Lithium Trolling Motor Battery

Best Lithium Trolling Motor Battery

Ionic Batteries Lithium-Ion Battery

Made for life on the water and is also a deep cycle lithium-ion battery that requires zero maintenance and topping up.

Ionic Batteries Lithium-Ion Battery

The best lithium trolling motor battery is the Ionic Batteries Lithium-Ion Battery.

It’s long-lasting, fast to charge.

It will run your trolling motor for 2 days quite easily and it has built-in Bluetooth so you can check how much charge it has left on your smartphone.

Renogy Deep Cycling Hybrid Gel Battery

Renogy Deep Cycling Hybrid Gel Battery

A gel electrolyte battery that will let you run your motor all day long without any worries.

Renogy Deep Cycling Hybrid Gel Battery

The best trolling motor battery that is a 12-volt is the Renogy Hybrid Gel Battery.

It holds its charge longer than any others while not in use and is durable and maintenance-free.

It’s also a deep cycle battery, releasing power slowly and ensuring your trolling motor can run all day without worries.

Best Battery For A 24 Volt Trolling Motor

Vmax XTR31-135 24 Volt Trolling Motor Batteries

A pair of 2 x 12-volt batteries that connect together to give you 24 volts for your 24-volt motor.

Vmax XTR31-135 24 Volt Trolling Motor Batteries

The best battery for a 24-volt trolling motor is the Vmax XTR31-135. This is a pair of 12v AGM deep cycle batteries linked together to give you 24 volts.

They give you an excellent amount of charge, 135ah, to run your motor all day with.

You can also mount them in any position and you get a 265-minute power reserve to ensure you’re never caught short out on the water.

Best AGM Trolling Motor Battery

VMAX MR137-120 AGM Sealed Marine Battery

An AGM deep cycle battery and is therefore sealed and maintenance-free, as you won’t have to add any water to top it up.

VMAX MR137-120 AGM Sealed Marine Battery

The best AGM trolling motor battery is the VMAX MR137-120.

It’s specifically designed for trolling motors and will give you between 50lb -110lbs of thrust to get you places quickly.

It also releases charge slowly, is easy to mount anywhere, and comes with 120ah to ensure you can run your trolling motor all day long.

Our Top Trolling Motor Batteries

Interstate Batteries

Comes with a 75 amp hour rating which is more than enough to run your motor all day long.

Interstate Batteries

The Interstate Batteries SLA/AGM Deep Cycle Battery is a sealed lead-acid battery with an absorbed glass mat (AGM) that is soaked in electrolytes and placed between the battery plates.

Maintenance

With AGM batteries, there is no need to have to refill it with electrolyte solutions, as the mat absorbs them and ensures they aren’t burnt off at any time during use.

This makes them almost zero maintenance bar cleaning it up and charging it.

This is also a deep cycle battery, meaning it will hold its charge and release slowly throughout the day, rather than running out of charge quickly.

Power

This AGM battery is a 12-volt, which is what most trolling motors run on, and comes with a 75 amp hour rating which is more than enough to run your motor all day long. It charges quickly and easily and has a long service life.

You should expect a good 2-5 years out of this battery or more, depending on how it’s treated.

Capacity

Another great thing about this trolling motor battery is that it can handle vibrations from a boat very well thanks to the AGM keeping hold of the electrolytes, rather than them vibrating around all day and losing charge in liquid form.

The battery has good dimensions that make it easy to install on your small boat or kayak, but it is heavy at 51.5 lbs, and you should take care when moving it around.

Terminals

The only downside to these Interstate Batteries is that they come without any terminals and you’ll have to add your own.

Specs

  • Weight: 51.5 lbs
  • Dimensions: 10.24 x 6.61 x 8.19 inches
  • Voltage: 12
  • Type: AGM Lead Acid
  • Amp Hours: 75

Pros

  • Rechargeable and spill-proof
  • Universal and works well
  • Charges quickly and easily
  • Runs your motor for up to 10 hours without charge
  • Small dimensions to fit in your boat or kayak
  • Long service life
  • Handles vibrations well

Cons

  • Very heavy
  • Add your own terminals

Best 12 Volt Trolling Motor Battery

Renogy Deep Cycling Hybrid Gel Battery

A deep cycling hybrid gel battery that will let you run your motor all day long without any worries.

Renogy Deep Cycling Hybrid Gel Battery

The Renogy Deep Cycling Hybrid Gel Battery uses a gel electrolyte solution instead of water.

This means that you won’t have to replenish it with water and that the battery is sealed making it almost maintenance-free.

Power

Another advantage of a gel battery is that it holds its charge when not used much better than a wet cell battery or an AGM battery.

This means while it’s in the shed in the offseason, you’ll only have to top it up and charge it now and then, unlike wet cells that need to be charged more often to ensure long service life.

Duration

This battery is a 12 Volt battery that comes with 100ah.

Being a deep cycle battery, it lets the charge out slowly, and with 100 Ah, will run your motor all day long without any worries.

This deep cycle battery has good dimensions for fitting in any vessel, small or large, and it comes with corrosion-resistant silver-plated copper terminals with bolt type connections to make it easy to hook up your motor.

Weight

The battery is a little heavy to move around at 60 lbs.

The only major downside to this battery is that it requires a special charger because it’s a gel rather than a wet cell battery.

Specs

  • Weight: 63.9 lbs
  • Dimensions: 12.9 x 6.8 x 8.7 inches
  • Voltage: 12
  • Type: Gel
  • Amp Hours: 100ah

Pros

  • Sealed and leakproof
  • Low maintenance thanks to the gel design
  • Excellent longevity with 100 amp hour capability
  • Doesn’t lose much charge in storage
  • Silver-plated copper terminals for durability
  • 3-year warranty
  • Will drive a motor for more than a day
  • Easy to fit in your boat or kayak

Cons

  • Heavy to move around
  • Requires a special charger

Trojan T31-AGM Group 31 Deep Cycle AGM Battery

This battery holds its charge for a long time and slowly releases just what the motor needs without waste.

Trojan T31-AGM Group 31 Deep Cycle AGM Battery

The Trojan T31-AGM is a Group 31 AGM deep cycle trolling motor battery. Being a deep cycling battery, it will release it’s charge slowly, and being a Group 31 battery, it releases it even slower.

It holds its charge for a long time and slowly releases just what the motor needs without waste.

Power

It’s a 12-volt battery with 100ah, more than enough to power your motor for a day or two without needing a charge.

Charging it is also simple and easy, and it charges up quite quickly too, so you won’t have to wait around.

Solar

This battery is also excellent for charging via solar, and you would be wise to add a small panel to your boat that would trickle charge the battery so it’s always juiced up and ready to go for your motor.

Durability

Being an AGM battery, it’s sealed and will handle shock and vibrations well plus it’s pretty much maintenance-free. There will be no need to top it up; you’ll just need to clean the terminals now and then – and charge it, of course.

The only downside to this AGM battery is that it is very expensive, almost double some of the others, and it’s very heavy to move around at 69 lbs.

Specs

  • Weight: 69 lbs
  • Dimensions: 10.51 x 6.8 x 8.3
  • Voltage: 12
  • Type: 31 AGM Lead Acid
  • Amp Hours: 100ah

Pros

  • A great amount of Ah to power your motor all-day
  • Long-lasting and durable build
  • Leakproof for safety
  • Excellent terminals that handle the salt
  • Good dimensions to fit it in your boat
  • Slow-release of charge over long periods
  • Low maintenance and handles vibrations well
  • Excellent for charging via solar

Cons

  • Very heavy
  • Very expensive

Odyssey 34M-PC1500ST-M TROLLING Thunder

Specially designed for life on the water and will always have enough charge to start your motor.

Odyssey 34M-PC1500ST-M TROLLING Thunder

The Odyssey 34M-PC1500ST-M TROLLING Thunder Deep Cycle Marine Battery is specially designed for life on the water and will always have enough charge to start your motor, while slowly releasing charge like all other deep cycle batteries.

Build

It’s also an AGM battery, meaning it’s sealed, safe, and pretty much free of any required maintenance bar charging and rubbing down the terminals now and then.

Power

It’s a 12-volt trolling battery and comes with 68 ah which is enough to run your motor for most of a day, but it’s not quite as good as having 100 ah on board.

However, this trolling battery does come with a 135-minute reserve capacity, which is enough reserve capacity to be able to get you home as long as you’re not too far away.

Charging

These AGM lead-acid batteries are easy to charge and work well with a trickle from an onboard solar panel.

They are also a little lighter than others in the review, but that is due to the lower ah.

Design

This trolling motor battery also comes with dual-purpose terminals instead of two, which means you can reserve one set for your motor and the other set for any other electronics you might want to connect like a GPS or fishfinder.

The only real drawback of this battery is that it’s quite expensive, especially considering the lower amp hours when compared to other more affordable ones.

Specs

  • Weight: 49.5 lbs
  • Dimensions: 13.25 x 11 x 9.5 inches
  • Voltage: 12
  • Type: Lead-Acid, AGM
  • Amp Hrs: 68 ah

Pros

  • Includes a 135 min reserve capacity for emergencies
  • Dual-purpose battery terminals for easy connectivity
  • Durable and long-lasting
  • Will keep your motor running for hours
  • Always enough to charge to start your motor
  • Lighter than other batteries
  • Easy to charge
  • Maintenance-free except for charging

Cons

  • Expensive
  • Low amp hour battery than others

Top Pick

Mighty Max Battery 12v

Sealed and maintenance-free battery that release its charge slowly, ideal for running your motor all day long.

Mighty Max Battery 12v

The Mighty Max Battery 12v is another AGM trolling motor battery.

Being AGM, it’s sealed and maintenance-free as you won’t have to add any water to the cell to keep it topped up.

The Mighty Max battery is a deep cell battery and will release its charge slowly for use over long periods of time, like running motors all day long.

Power

This Mighty Max is a 12-volt battery, which all trolling motors use and comes with 100 amp-hour of charge which is more than enough to fish from dawn to dusk with your motors running the whole time.

Charging

The Mighty Max is also easy to charge and does well when connected to a solar panel on your boat to keep it topped up.

It charges up quickly but the terminals come empty, so you’ll have to add your own bolts to them.

It’s quite affordable and comes with a 1-year warranty.

Its dimensions make it a good size to add to any boat.

Specs

  • Weight: 60 lbs
  • Dimensions: 12.17 x 6.61 x 8.30
  • Voltage: 12
  • Type: AGM SLA battery
  • Amp Hrs: 100ah

Pros

  • Comes with a 1-year warranty
  • Sealed and leak proof
  • Well made and maintenance-free
  • Small dimensions for your boat
  • High performance for starting and long-lasting current delivery
  • Charges quickly and easily
  • Will run motors all day with ease
  • Affordable

Cons

  • Heavy to move around
  • Have to add your bolts to the terminal

Lightest Trolling Motor Battery

VMAX MR96-60 AGM High-Performance Battery

Specifically made as a trolling motor battery and can provide 24-50lbs of thrust to most electric trolling motors on the market.

VMAX MR96-60 AGM High-Performance Battery

The VMAX MR96-60 AGM High-Performance Battery is another deep cycle battery that is also AGM. It’s been specifically made as a trolling motor battery and can provide 24-50lbs of thrust to most electric trolling motors on the market.

Build

Being AGM, it’s sealed and maintenance-free without the need to top it up like wet cell batteries.

The battery will also handle boat vibrations well thanks to the mat that holds everything together on the inside.

Power

The battery is a 12-volt and comes with 60 amp-hours and it releases its charge slowly to ensure you can run your motors for long periods of time.

You’ll notice the amp-hours are a little lower than other batteries, and this does mean you’ll get less trolling timeout of it, but it also makes the battery lighter and more affordable.

Weight

It’s a great choice for a kayak angler as it won’t weigh you down too much, as long as you’re not relying on your motors to move you around all day.

These batteries are quick charging, saving you any time waiting if you forget to top them up, and they are pretty long-lasting too with a float service life span of 8 to 10 years.

Specs

  • Weight: 43 lbs
  • Dimensions: 9.2 x 5.5 x 8.3 inches
  • Voltage: 12
  • Type: AGM SLA
  • Amp Hrs: 60

Pros

  • Made specifically for trolling motors
  • Maintenance-free operation
  • Lightweight and with small dimensions
  • Excellent power for your motors
  • Charges easily
  • More affordable than others
  • Float service life span of 8 to 10 years

Cons

  • Amp-hours are a low for all-day trolling

Best AGM Trolling Motor Battery

VMAX MR137-120 AGM Sealed Marine Battery

An AGM deep cycle battery and is therefore sealed and maintenance-free, as you won’t have to add any water to top it up.

VMAX MR137-120 AGM Sealed Marine Battery

The VMAX MR137-120 AGM Sealed Marine Battery is designed specifically for trolling motors and can deliver between 24-50lbs of thrust to Minn Kota, Cobra, Sevylor, and other electric trolling motors out there.

Build

It’s an AGM deep cycle battery and is therefore sealed and maintenance-free, as you won’t have to add any water to top it up like you would with wet cell batteries.

It releases its charge slowly to ensure you can run your motors all day long without any worries.

Power

It’s a 12 Volt battery and comes with 120 amp hours which is more than most of the others in the review, and will power your motors for a day or two with ease.

This battery is also quick charging and will be topped up faster than most, making for less time waiting around to go fishing if you have forgotten to top it up.

Terminals

The terminals come readily equipped with bolts and washers, making it easy to slide on your motors connections and tighten them down.

This battery is also more affordable than a lot of the others, which is awesome considering the extra amp hours it has.

But the extra amp hours do make it heavier than others and at 74 lbs it’ll be hard to carry and might weigh down your boat a bit, especially a kayak.

Accessories

You can also add products and accessories to your battery or motor batteries if you like, such as the MinnKota Trolling Motors Power Center.

This is a case for your battery that has a built-in battery meter that displays the current “state of charge” and comes with external terminals for your motors.

Specs

  • Weight: 74 lbs
  • Dimensions: 13 x 6.8 x 8.8 inches
  • Voltage: 12
  • Type: Group 31 AGM
  • Amp Hrs: 120

Pros

  • Float Service Life span of 8 to 10 years
  • Made specifically for trolling motors
  • Gives your motors 50lb -110lbs of thrust
  • Awesome amp hours for long days of trolling
  • Zero maintenance design
  • Excellent terminals
  • Charges well and easily
  • Can be mounted in any position

Cons

  • Very heavy

Best Lithium Trolling Motor Battery

Ionic Batteries Lithium-Ion Battery

Made for life on the water and is also a deep cycle lithium-ion battery that requires zero maintenance and topping up.

Ionic Batteries Lithium-Ion Battery

The Ionic Batteries Lithium-Ion Battery is one of the best as it is made for life on the water and is also a deep cycle lithium-ion battery that requires zero maintenance and topping up, unlike wet cell batteries.

Build

It is designed to handle rigorous deep charges and long slow recharges, making it not only easier to charge overall but longer-lasting and quicker to charge too.

Most other AGM trolling motor batteries require a long slow charge and can be damaged with a fast deep charge.

Power

Being a deep cycle battery, it releases charge slowly to ensure your motor gets consistent power all day long.

It also comes with more than enough amp hours with 100ah, which ensures you can run your motor all day long without worries.

There are some great things about these lithium-ion deep cycle batteries.

Features

The first is dual purpose long terminals that allow you to put one set of connections for your motor and another for other devices like a fish finder.

The built-in Bluetooth allows you to check the battery’s status, so you know how much charge you have and when to recharge it.

Weight

This battery is also the lightest battery in the review, is the longest-lasting and can be recharged faster and more times over the course of its life than any other featured.

The only downside to these trolling motor batteries is that they are super expensive, but that’s what you get for the best motor battery performance.

Specs

  • Weight: 28 lbs
  • Dimensions: 13.00 x 6.70 x 9.04 inches
  • Voltage: 12
  • Type: Lithium Ion
  • Amp Hrs: 100ah

Pros

  • Durable and handles both rigorous deep charges & long slow recharge
  • Lots of amp hours for long trolling days
  • 5-year warranty included
  • Bluetooth battery monitoring
  • Reliable and powerful
  • Dual-purpose terminals for multiple connections
  • Good dimensions to fit in any boat
  • The lightest battery in the review
  • The longest life cycle of all the batteries in the review

Cons

  • Very expensive
SLI31MDC

Duracell Ultra SLI31MDC Battery

The most affordable battery in the review while still delivering as good a quality as the rest of them.

Duracell Ultra SLI31MDC Battery

The Duracell Ultra SLI31MDC Battery is one of the best trolling motor batteries around if you’re on a budget. It’s the most affordable battery in the review while still delivering as good a quality as the rest of them.

It’s a deep cell battery and an AGM battery meaning it’s maintenance-free as it won’t require topping up like wet cell batteries, and it’ll also release its charge slowly over a large length of time, ideal for using a motor all day.

This battery is a 12v battery with 105 amp hours, which is more than enough to ensure you can use your motor for a large length of time, up to 2 days. The battery also comes with a 190-minute reserve capacity which will help you get home if you get caught short out on the water.

Another great thing about this battery is that it comes with a 1-year free replacement warranty, so if anything does go wrong, you’ll get a new battery absolutely free.

Specs

  • Weight: 59 lbs
  • Dimensions: 13 x 6.75 x 9.5 inches
  • Voltage: 12
  • Type: AGM Lead Acid
  • Amp Hrs: 105

Pros

  • 1-year free replacement warranty
  • Great amp hours for all-day trolling
  • Easy to charge and does so easily
  • Made for trolling motors
  • Durable and long-lasting
  • More adorable than all the others
  • 190-minute reserve capacity
  • 650 cold-cranking amps

Cons

  • Heavy

Best Battery For A 24 Volt Trolling Motor

Vmax XTR31-135 24 Volt Trolling Motor Batteries

A pair of 2 x 12-volt batteries that connect together to give you 24 volts for your 24-volt motor.

Vmax XTR31-135 24 Volt Trolling Motor Batteries

The Vmax XTR31-135 24 Volt Trolling Motor Batteries come as a pair of 2 x 12-volt batteries that connect together to give you 24 volts for your 24-volt motor.

They are both AGM deep cycle batteries that you don’t have to maintain like wet cell batteries, as they are sealed and have no need for a top-up.

Build

They handle boat vibrations well and can be mounted in any position, making them a little easier to install on your boat.

Being a set of deep-cycle trolling motor batteries, they release their charge slowly over a long length of time.

Power

They come with a total of 135 amp-hours which is enough to keep your motor running all day.

The battery set also has a reserve of 265 minutes to ensure you can always get home even if you have stayed on top of charging them.

Warranty

They’re quick and easy to charge and they come with a 1-year warranty if anything was to go wrong, like not holding their charge.

The downsides to this 24-volt battery set are that they are extremely heavy with a total weight of 150 lbs, and because you’re getting two batteries, the set is expensive.

Specs

  • Weight: 75 lbs per battery
  • Dimensions: 13 x 6.8 x 8.7 inches per battery
  • Voltage: 24 V
  • Type: AGM
  • Amp Hrs: 135ah

Pros

  • Excellent amp hours for all-day trolling
  • Maintenance-free AGM design
  • 265-minute reserve capacity
  • Quick and easy to charge
  • Ideal for 24 Volt trolling motors
  • Can be mounted in any position
  • Includes a 1 Year replacement warranty
  • Resists shock and vibrations

Cons

  • Superheavy with a total weight of 150 lbs
  • More expensive due to having 2 batteries

What is a trolling motor battery?

Motorboat Water Wake
Motorboat Water Wake

A trolling motor battery is a type of battery that provides your motor with electricity in order to power it.

It’s a rechargeable battery that is made differently to ensure that you can use your motor for long periods of time without running out of power.

How is a trolling motor battery different from regular batteries?

The main difference between a trolling motor battery and regular batteries is that they are designed with deep-cycle technology.

This means instead of delivering a lot of charge quickly like regular batteries, it lets its charge out slowly to ensure you can run your motor for longer periods of time.

How long do trolling motor batteries last?

This depends on the type of battery you choose, but they can last anywhere between one to seven years or more.

We’ll get into the types later, but for reference, this is how long each type lasts.

  • Marine wet cell batteries: 1-6 years
  • Gel deep cycle: 2-5 years
  • AGM deep cycle: 4-7 years
  • Lithium deep cycle: 7 years or more

What type of battery is best for a trolling motor?

Trolling Rods at the Back of a Boat
Trolling Rods at the Back of a Boat

The best type of battery for a trolling motor is any type that is deep cycling.

Deep cycle batteries offer a lower and steadier provision of power rather than spending it all quickly and therefore ensure you can run your motor all day long without running out of power on the water.

Types

Wet Cell

Wet cell batteries are lead-acid batteries and are the most common and you’ll find them in a lot of cars.

They hold many cells in an electrolyte solution that is known as battery acid.

They last quite a long time, up to 6 years but they require a lot of maintenance.

Water Level

You’ll have to top the water often to ensure the levels don’t fall too low, as otherwise, the battery will stop holding a charge.

They also don’t handle boat vibration well due to the electrolyte being in liquid form.

AGM Batteries

MR137-120 Deep Cycle AGM Battery Product Image
MR137-120 Deep Cycle AGM Battery Product Image

AGM stands for Absorbed Glass Mat, and they come with a fiberglass mat that is soaked in electrolytes and placed between the battery plates.

This allows AGM batteries to be sealed as they are not liquid-based, and you won’t have to top them up with water at all.

Being non-liquid AGM batteries can also handle vibrations a lot better.

NOTE

The downsides to AGM batteries is that they are heavier than most others, and they don’t like being overcharged and will lose performance if this happens.

Gel Cell

Gel batteries are filled with electrolytes like the wet cells but instead of being in water, they are in a gel.

This means there is no need to top up the cell with water and it can handle any vibration with ease.

Discharge

The great thing about gel batteries is their slow discharge.

When stored they will lose barely any charge when compared to wet cells or AGM batteries.

This means they’ll last longer when not in use on a vessel, and require less topping up during the offseason.

NOTE

The downside to these batteries is that they are more expensive and you’ll have to buy a dedicated special charger for them.

Lithium-Ion

Ionic 12 Volt 100Ah Lithium Deep Cycle Battery
Ionic 12 Volt 100Ah Lithium Deep Cycle Battery

Lithium-ion batteries are the best performing of them all but they are also up to 4 times the price of the others.

The reason they are so good is because they are much lighter, charge much faster and last much longer, more than seven years compared to 1-7 years which is all the others can manage.

Deep Cycle

All of the above types of batteries can also have deep-cycle technology within them, and as we touched on above, a deep cycle is a must for your trolling motor to be able to run for long periods of time.

Deep cycles work by releasing their charge slowly over a long period of time, but shouldn’t go down to below 80% before they are recharged in order to not affect their performance.

Dual Purpose

A dual-purpose battery is a deep cycle battery (usually AGM) that also has enough charge to start a normal petrol outboard engine

You can therefore use one of these batteries to run both a trolling motor and your outboard engine rather than having two batteries.

NOTE

These batteries are useful on flat skiffs that would use an outboard engine to get to the fishing grounds, and then switch to a trolling motor so they can sneak around quietly.

Things to Consider When Buying the best trolling motor battery

Picking The Right Type

We now know that the one thing you have to choose when buying a trolling motor battery is that it has to be a deep cycle battery and then you have a choice to make whether to go for: wet cell, AGM, Gel, or lithium batteries.

I’d advise against wet cell batteries due to the maintenance required and the fact that these batteries don’t do well with vibrations.

Otherwise, AGM batteries, Gel, and lithium are all solid choices, and it comes down to your budget at the end of the day, AGM batteries being the most affordable.

Size And Weight

To work out which size battery you need, think about the size of your vessel and where you plan on putting your battery.

The dimensions are all quite similar across the various types, but the weight differs considerably depending on the amp hours and the type.

Types

Lithium batteries can weigh around 20lbs, whereas an AGM battery with a lot of amp hours can hit 75lbs quite easily. If you have a 24-volt motor, you’re going to need two of them.

Weight shouldn’t be an issue in most vessels but it might be if you’re in a kayak for example. The battery might weigh you down too much, or cause the kayak to be unstable if it’s too heavy.

NOTE

Also, you’re going to have to carry the battery to and from your vessel when it needs charging or for security purposes, and lugging around a 75 lb battery is one hard task.

Charger & Charging Time

All battery types can use the same deep cycle charger except for gel batteries that require their own special charger.

Lithium batteries charge the fastest, and gel batteries require the least amount of charging as they hold their charge well when not in use.

Type

Charging times vary by battery brand across all types as well, so look out for any quick charging options as it’ll save you time and waiting around if you forget to charge in preparation for a fishing trip.

Recharging

How to Charge A Deep Cycle Battery

Never let your charge drop to zero, always charge your battery when it has around 20%. This will ensure it’ll continue to hold a charge and perform well.

You should never overcharge your battery as this can cause damage to it, especially with AGM batteries.

Overcharging is worse than letting it go empty. It causes the acid inside to boil and percolate, leading to the decomposing of the electrolyte and will induce premature aging.

Overcharging Effects

It can also lead to the battery cracking, as the acid will eventually heat up enough and expand and render your battery completely useless.

The best way to avoid all of this is by having a good deep cycle charger that will do it all for you by delivering the right amperage at the right times during the charge.

TIP

It’ll also make sure you don’t ever overcharge by detecting the battery is full and stopping the current and it’ll charge up quickly.

Voltage

The voltage you require is based on your trolling motor and needs to match it for it to work effectively. Trolling motors come in either 12-volt or 24-volt options, so you’ll need 12 or 24 volts of battery for them to work.

Motor

All the trolling motor batteries out there are 12-volt batteries which makes life simple if you have a 12-volt motor, you’ll need one 12-volt battery.

If you have a 24-volt motor, you’ll need two 12-volt batteries rigged in series to give you the 24-volts you need.

Amperage Hours

Every battery comes with a number of amperage hours (ah). The higher the number, the more hours your battery can power your motor for.

You should aim for a size battery with 100ah or thereabouts to guarantee being able to run your trolling motors all day.

Range

The amperage hour rating of a battery can range from 35 to 135ah, and there is a quick calculation you can do to work out how long your motors will run on different amperage hours.

Simply divide the number of amperage hours, let’s say 100ah, but the draw of your engine, say 10 amps.

In this case, you’ll have 10 hours of run time from a 100ah battery.

TIP

You can use this simple equation to work out the exact amperage hours you need from a battery for the amount of time you want to spend out on the saltwater.

Reserve Capacity

Family on a Motorboat
Family on a Motorboat

Not every battery has a reserve for you to use, but the best ones do and I highly recommend getting one with a reserve of 175 minutes, or thereabouts.

Having a reserve in your battery means if you happened to run out of charge on your battery, you’ll still have enough juice to get home or at least somewhere safe, instead of drifting off into the unknown.

Indicator

It can be hard to tell how much charge your battery has left, and one day you’ll get caught short, it happens to all of us.

I’ve had to save boats when fishing in Seychelles who’s battery died over the course of the day, and it was lucky they had a radio to ask for help.

Trickle Charging

One thing you can do, depending on the size of your vessel, is put a small solar panel on it to trickle charge your battery to ensure it’s being topped up during the day.

It won’t fully charge the battery, but it will certainly help.

Accessories

One other thing you can do is add a case that displays the state of charge, letting you know how much charge your battery has left, so you always leave enough charge in the battery for your day on the water.

Maintenance & Long Term Care

Your battery needs looking after, just like your vessel.

The more care you give it, the longer it will last, and the better it will perform.

Every time you leave your vessel, check the battery and clean any corrosion off the terminals or dirty that might have built up.

This will ensure it doesn’t discharge as fast, making sure to save the charge for when you want to use the battery.

Check For Damage

You should also check for any cracks in the battery as this is a sign that there could be a problem with the voltage, and you’ll need to have it checked out by a pro to confirm it.

When the offseason comes, you’re going to need to store your battery properly to ensure it performs for the next season.

Storage

Preparing Your Marine Batteries for Winter – battery tender

Never, ever, leave your battery in storage without a full charge. As soon as the battery is being put away, charge it fully beforehand.

You can then choose to attach the battery to a trickle charger to ensure it stays charged all offseason, or check it monthly to see if it needs topping up.

Temperature

You should also ensure you store your battery in a climate-controlled environment, like a cupboard in the garage.

The recommended temperature is 15°C (59°F) and the extreme allowable temperature is –40°C to 50°C (–40°C to 122°F) for most types.

TIP

Having a good charger for your battery is also a good idea if you want it to last a long time. This will allow you to charge your battery perfectly and never overcharge it and damage it.

Trolling Motor Battery Question & Answer

How long do agm batteries last?

On average an AGM battery will last up to 3-5 years, but one thing you can do to make this longer is to maintain it properly.

If you look after your AGM battery correctly, following the advice I have above, you can make it last up to 8 years.

What is the best battery for a Minn Kota trolling motor?

One of these motors will run fine with any deep cycle, marine-grade 12V battery, so you can pick any of the ones in the review, and you’ll be fine.

Just make sure to pick a battery with the right amperage hours for your needs, and the type of battery you prefer.

Summing Up

I hope the world of the best trolling motor batteries is a little clear for you now. It is quite a complicated topic when you start considering all the different types out there, let alone when you get hit with all the technical information.

The key is to pick a battery that is going to run your engine long enough and is easy to charge. If you haven’t quite decided which battery to choose yet, here are my top 2 which might make your decision a little easier.

Best Lithium Trolling Motor Battery 

The best one in the review is the Ionic Batteries Lithium-Ion Battery and it’s also the most expensive by 3, 4, or 5 times some of the others.

But, it’ll last longer than all the others and it’s much quicker to charge too.

With this battery, you’ll never have to worry about running out of charge as it lets you know via Bluetooth and you’ll always have enough charge for an uninterrupted day of fishing.

Best AGM Trolling Motor Battery

My other favorite is the VMAX MR137-120 Battery.

This battery is one of the most reliable while still delivering everything you need to enjoy motoring around on your boat.

It delivers charge slowly and for long periods of time, is hassle-free, and is durable too.

You can beat it for your trolling motor.

Feel Free to Share!

Thanks very much for reading my article and I hope you found it useful.

Please feel free to share it around with your friends and family, and if you liked it, I have a few more articles you might be interested in.

I cover everything from fly fishing to fishfinders and GPS units, so if you need some new gear, you’ll find all the info you need on them right here.

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Lance Wilkins
Lance Wilkins
Editor @ CallOutdoors. Outdoor gear-head and adventure addict. I fish, camp and enjoy to writing about my adventures.
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