Best Trolling Motor Battery – ULTIMATE Buyer’s Guide and Reviews
Trying to choose the best battery for your trolling motor may seem like a bit of a challenge, considering there are so many different types for different uses. But how do you know which one will be the best? How long will it last? And what type of trolling motor battery do you need?
In a rush? This one from Optima is our #1 choice.
We understand that it can all be a little confusing, especially if you’re new to buying marine batteries. But we have put together a few details to give you some idea of the types of trolling motor batteries that are out there and what to look out for when you go to buy a specific battery.
Trolling Motor Batteries: At A Glance
(more on these below. The links take you to Amazon)
Top 11 Best Trolling Motor Batteries Review
1: Optima 8016-103 D34M BlueTop 55 ah 12 Volt Marine Battery
This is a 12V (750 cold cranking amps) AGM deep cycle battery that is basically maintenance free. With a 55 ah rating, this Optima battery boasts being capable of having up to 3 times more battery charges than other marine batteries.
Designed to cope with long periods of inactivity but it might not work with all types of chargers, which may cause a dead trolling motor battery. However, there's usually a one year warranty.
It can be mounted in virtually any position, which could be a good feature when it comes to mounting it on your kayak, compared to other batteries. It weighs 43.5 pounds and measures 10 inches by 7 inches by just under 8 inches.
This deep cycle marine battery will work well in colder conditions (has optimal starting power even in bad weather) and benefits from having a reserve of 120 minutes, meaning it can run at 25 amps for 120 minutes before it will reduce its amp usage to a minimum level. Deep cycle marine batteries like this Optima battery also have good resistance against vibration, for durability, so it's an ideal trolling motor battery.
2: Interstate Batteries 35 ah AGM Deep Cycle Battery
This 35 ah AGM deep cycle battery can be ideal for small spaces. It's pretty compact, measuring just 7.68 by 5.16 by 6.14 inches and it weighs just 23.1 pounds, so this Interstate battery isn't going to add too much extra weight to your load.
Ideal as a deep cycle trolling motor battery, it has a long life cycle and deep discharge usage. It also has the benefit of being mountable at any angle, so you have a bit of freedom as to how you position it on your boat for long lasting performance.
The Interstate battery is a non-spillable sealed lead acid battery that can be great for use as a trolling motor battery on a kayak. This is a great battery with good overall power for small trolling motors but can also be used as a deep cycle mobility product.
3: Mighty Max Battery (55Ah) For Electric Trolling Motor
This is a high quality durable 12V deep cycle battery that will deliver 55 amp hours and has a calcium alloy grid, which boosts its performance. This is a good trolling motor battery Might Max offer, as it is well suited to all conditions, including both high and low temperatures, giving it a longer life.
This Mighty Max battery can be mounted in any position, so you’re free to attach it wherever suits you best and because of its sealed style it's totally maintenance free.
Despite it being a professional grade quality product and an affordable option, this deep cycle trolling motor battery is not the lightest, at 38.58 pounds, and it measures 9.02 by 5.43 by 9.13 inches. Be aware that no wire harness or mounting screws come with the product, unlike some other deep cycle marine batteries.
4: VMAX MR127 12 Volt 100Ah AGM Deep Cycle Maintenance Free Battery
This MR127 packs a lot of power, delivering 100 ah in a 12V battery. This could be a good choice if you’re looking for enough power and a longer life for a few hours on the water.
This deep cycle battery has maintenance free operation with heavy duty grids that are thicker internally for sustained power and extended battery life. It has a fast recharge rate and it is also durable, with strong vibration resistance, making it one of the best trolling motor batteries on the market.
It's heavier than other deep cycle batteries, weighing 68 pounds, and it’s also a little larger than some other AGM batteries, measuring 12.1 by 6.7 by 8.2 inches. Fits any Group size 27 box for marine batteries. This larger battery may restrict some of your space for fishing gear.
5: WindyNation 12V 100 Amp-Hour Deep Cycle VRLA Battery
The WindyNation is a long life 12V AGM battery with 100 amp hours that's designed for deep cycle performance, frequent recharging, as well as sustained performance and long service life.
It weighs 63.5 pounds and measures 13 by 6.8 by 8.7 inches, so it’s a little larger than some other models, so think about the space you need for the rest of your fishing gear. For kayaking, you may want a lighter battery than this but it could be a good battery to suit the power needs of small bass boats and it has a built in handle for convenience.
This deep cycle battery is durable and features a high reserve capacity of 240 minutes, which could make it a good choice for trolling motors. However, for kayaking, you may find that it might be a little too big and heavy.
6: Optima 8006-006 34M BlueTop Marine Starting Battery
This 12 volt Optima Blue Top 50 amp hour battery has strong deep cycle performance for marine use. It works well in cold temperatures and has a reserve capacity of 100 minutes, improving the battery's performance and letting you stay out to catch more fish.
You can mount it in any position, as it’s a spill-proof battery and requires no maintenance, meaning low operating costs. It utilizes AGM technology, has a longer life span and its amp hour rating means you’ll be able to power your trolling motor for a few hours on one charge.
This is a powerful and tough battery with a long service life that has strong vibration resistance and spiral cell technology. It measures 10 by 6.88 by 7.81 inches and weighs 38.4 pounds. It can also be used for both starting and deep cycle, even in harsh conditions.
7: ExpertPower EXP12180-2 Standard RBC7 Replacement Rechargeable SLA Battery
This can be a good choice if you’re looking to power a 24 volt trolling motor, as it is two 12 volt batteries that can be connected together in a series for more power. The trolling motor batteries are both sealed AGM technology types, so they can be positioned at different angles on your boat.
These trolling motor batteries both have 18 ah and could also be a good choice if you’re looking to have a spare battery on hand, as this could allow you to alternate between the two if you’re out on the water for a significant length of time.
However, you may find that each one has a low battery load so one may not last long if powering multiple electronics. This means you may need to use the other battery sooner than you hoped.
These maintenance free trolling motor batteries each measure 7.1 by 3.1 by 6.6 inches and weigh 24 pounds, offering great value for most anglers and an ideal addition to your fishing set.
8: VMAXTANKS Vmax857 Marine Deep Cycle Hi Battery
This 12V deep cycle marine battery is extra durable against vibrations, with its heavy duty Vmax plates inside its AGM design. This also helps to boost performance, giving it resistance and longevity when used frequently and being subjected to constant charging and recharging.
This Vmax battery can be a good maintenance free choice for small boats and it has the ability to be mounted in any position, which could make it easier to install on a kayak. It's compatible with a Vmax charge tank.
This 35 amp hour battery is also relatively compact, measuring 7.7 inches in length, 5 inches wide and 6.1 inches in height, making it ideal for use on a smaller vessel or smaller trolling motors.
9: Renogy Deep Cycle Hybrid Gel 12 Volt 100Ah Battery
This Renogy Deep Cycle Hybrid Gel battery is a 12V battery with a 100 amp hour rating that can be ideal if you’re looking to power a 12 volt trolling motor for a longer period. However, this will depend on the amperage draw of your trolling motor and whether you want to fire along at top speed.
This quality battery is not as compact as others, measuring 12.9 inches long and 6.8 inches deep, with a depth of 8.7 inches, so it can be worth checking that you have room on your kayak to accommodate it. It’s also a little heavier than some others, weighing in at just under 64 pounds.
This hybrid gel battery features a fully sealed leak-proof design and benefits from having corrosion resistant grids to give a long lifespan of up to 750 charge and discharge cycles.
10: Odyssey 34M-PC1500ST-M Trolling Thunder Marine Dual Purpose Battery
This Odyssey Trolling Motor Rechargeable Battery is a 12V AGM battery that is designed for use with trolling motors. It delivers 68 amp hours and features a sealed design with corrosion resistant brass terminals.
The battery weighs 49.5 pounds and measures 10.9 by 6.8 by 8 inches. A good feature of this one is that it has vibration resistance, which can be useful on marine craft.
Another good feature of dual purpose batteries is that they can be used both as a starting battery, like a car battery, and to power your onboard electronics. However, you may not want to use the same battery to do both things at once, as it will likely drain faster. It can last up to 400 cycles at 80% depth of discharge.
11: MinnKota Trolling Motor Power Center (Storage Unit Only)
If you have a small boat or a kayak with a transom mounted trolling motor, this could be a good option for you, as it is effectively giving you somewhere secure to store your battery. However, the power center is not a battery itself, it is only a case but it has a carry handle to make it easier to haul to your boat.
Designed for small boats that don’t have a battery compartment, this power center will hold marine batteries as well as let you have easy access to the terminals, so you can connect your trolling motor and charger without having to open the box.
It also benefits from having a battery meter built into it, so you can see its status and know how much power you have left. Another feature is that is has two manual circuit breakers; a 15 amp one and a 60 amp one, suitable for accessories and trolling motors.
Designed to fit group size 24 and 27 batteries.
Trolling Motor Batteries: Buying Guide
Types Of Batteries
There are various types of power sources out there but the most common ones used in trolling motors are wet-cell, Absorbed Glass Mat and lithium-ion rechargeable batteries. So we will take a look at each of these types and how they deliver a steady power output to your trolling motor, essentially all doing the same thing differently.
Lead acid wet-cell batteries are probably the most affordable type of battery for a trolling motor and is probably what your car battery is. This is a traditional battery that uses liquid acid in its construction. This is why they are referred to as lead acid wet cell and sometimes flooded cell.
Lead acid wet cell batteries are designed to withstand charging and draining frequently and are often traditionally used as car batteries, for that reason.
This makes them a popular choice for trolling motors because of the frequent usage and recharging that is expected with trolling motors. They are also able to stand up to being overcharged.
The downside of lead acid wet cell batteries is that they may require more maintenance, due to the battery acid and may require you to add distilled water. Another negative aspect of these types is that they are not sealed and can potentially leak battery acid. They also use lead plates which are fairly heavy.
Lead acid batteries are also susceptible to corrosion, due to leakage and other factors, which can have an effect on the performance and can damage it completely. This is another reason why they require more maintenance and can be time consuming, especially if you’re about to head out on the water when you discover it.
The vibrations that are sustained when you’re out on the water can cause further leakages and damage and potentially cause corrosive sulfuric acid to leak over you and your boat. Lead acid batteries will also require a well ventilated compartment due to them releasing hydrogen gas. A lot of people may prefer an AGM type for this reason.
What's that? A jet trolling motor?!
AGM stands for Absorbed Glass Mat, which refers to their construction using fiberglass matting.
These batteries are completely sealed, meaning they won’t leak sulfuric acid and they don’t require ventilated cases, as the gases are safely contained within its construction, often with an electrolyte suspension system. Some of the best marine batteries are usually AGM.
Having an enclosed case usually means you can install them in a variety of positions, which makes an AGM battery easier to fit onto boats or kayaks with limited space or mounting options. The non-hazardous sealed construction can also help prevent shock.
They charge faster and last almost twice as long as a wet-cell battery, and they tend to pack more power into a smaller area, making them space-saving and lightweight, which can be ideal for smaller boats and kayaks, or for fishing for long durations.
The advantages of AGM batteries are that they require no maintenance and they work well as deep cycle batteries for trolling motors because of their ability to stand up to the demands of frequent charging and recharging.
Deep cycle means the cycle of them being constantly used, drained and recharged, for a main power source, compared to a float cycle, which is most often used on generators or when the batteries are used as a backup power supply and not the main source of power.
Another advantage is that they work well in cold temperatures and have good resistance against vibration, which makes them a popular choice for trolling motor batteries because of their durability. This can make them a more reliable battery than others.
AGM batteries don’t, however, like heat, as this can damage them, and additionally they are also susceptible to being overcharged; but depending on the type of charger used, this can usually be avoided.
Another downside of glass mat agm batteries is that they can cost quite a bit more than a wet-cell battery but the advantages usually outweigh this disadvantage.
If you’re looking to cut down on the weight in your boat then a Li-ion battery will certainly do that. They are much lighter than wet-cell or AGM batteries, but they are also more expensive. However, they can be ideal as a trolling motor battery.
These are relatively new batteries to the trolling motor market but are increasing in popularity because of their good battery performance and they don't usually require maintenance.
You may already be familiar with lithium-ion batteries, as they are most commonly used in smartphones, laptops and other gadgets. This is because they charge fast and will generally last a long time, provided you don’t let them overheat. Li-ion can make a very lightweight trolling motor battery compared to both a deep cycle AGM and wet-cell battery.
For trolling motors, they are most frequently used by anglers who are involved in tournaments, as the lighter weight means you can increase your speed and the fast charging time means you can fish without delays with less chance of a dead trolling motor battery. A Li-ion battery is a very compact battery so could be worth the extra money.
Batteries 101: What To Look Out For
When you’re choosing a trolling motor battery, one of the most important things you should take into account is its ampere hours - commonly abbreviated to amp or Ah. This can help you find the right battery.
In order to work out how many amps you need from your battery you need to know how many amps your trolling motor needs, for example, the current it requires to power it.
You should also keep in mind that batteries will come in 12 volts. Most trolling motors are usually 12V, especially those used on smaller vessels, such as a kayak, so you will usually find one 12V battery is sufficient.
However, if you have a 24V trolling motor, you will need two 12V batteries and for a 36V motor you will need three. On the other hand, you may find that some Li-ion ones will have a higher voltage, meaning you may only need one for a 36V motor.
Another thing to factor in is that if you do require two batteries, you need to make sure that they’re both the same type. For example, if one is a wet-cell, the other will also need to be a wet-cell. You shouldn’t mix a wet-cell with an AGM or AGM with Li-ion.
It’s also good to note that both batteries should be of equal charge and the same age. Mixing an old battery with a new one could lessen the lifespan of your new one, as it can drag it down to its pace.
How Long Do Batteries Last On Each Charge?
The length of time your trolling motor battery will last on a single charge will depend on the type of battery you have and the type of motor you’re running. It will also depend on whether you’re traveling at full speed, pulling a heavy load or looking for constant performance.
The best way to work out how long it will last is to find out the amp draw of your motor. Then you calculate the hours by dividing the amp hours in the battery by the amps in the motor.
For example, if your battery is 100 amp hours and your motor is 20 amps going at a medium speed, you’ll get 5 hours of running time from the battery. The higher the amp run time hours in the battery, the longer it will last on one charge and, similarly, the higher the amperes required by the motor, the faster it will drain (high discharge rate). So if you're racing at top speed, you probably won't be able to do it for long.
How Long Do They Take To Charge?
A wet-cell or AGM battery will take significantly longer to charge than a lithium-ion battery, and may take a couple of days to fully charge. The length of time it will take for your battery to fully charge will depend on the amps in the charger.
The higher the amps in the charger, the faster your battery will charge. A typical battery will charge in around 12 hours with a 5 amp charger, so most can be charged overnight for convenience but just remember, it’s important not to overcharge them.
With wet-cell batteries, overcharging can lead to corrosion, which can cause the circuit to break or prevent it from holding a charge. If corrosion does occur, it can be cleaned off with a wire brush and some water with baking soda.
It’s possible to get smart chargers that will automatically turn off when the battery is charged, which prevents the batteries from overheating or being damaged due to overcharging.
Another thing that will affect the length of time it will take to fully charge is if the battery is completely dead when you start to charge it. However, it’s not a good idea to let your batteries drain completely as this can affect the longevity of them.
On the other hand, when you do charge it, you should charge it till it’s completely full, as undercharging it can also lessen the life of the battery. By undercharging them, batteries can develop a sort of memory that will mean they will think they are full when they reach this point.
This can mean they will never charge beyond this point, which can also mean you won’t get the expected amp hours from one charge and mean your day on the lake may be lessened. New batteries should be fully charged when you get them.
A Li-ion battery recharges quickly and will take around 2 hours to fully charge. You can also get portable chargers that can come aboard with you to keep you powered if your battery dies unexpectedly far from shore.
Solar powered chargers could be a good option if you’re looking to charge up your batteries and keep your motor running while you’re out on the water. Most of the time you may find that they will help keep your batteries from draining but may not always be a good source of power if your battery is flat.
Because you’re already outside with solar energy in abundance, these chargers could mean you get to extend your fishing trip beyond the normal capacity of your battery.
How Should I Store The Battery?
After you’ve returned from your fishing trip you should always make sure you recharge your battery. Leaving any battery type without a charge can cause problems, such as a dead battery when you next go to use it.
Much like a car’s battery, if the battery isn’t used for a length of time it may not recharge. So it’s important to always ensure your battery is charged, particularly if you’re not using it or there are cold weather conditions.
Having them fully charged will also make it more convenient for you the next time you’re heading out to the water, as you and your battery will be ready to go whenever you like.
You should make sure the area where you’re storing it is cool and dry to extend the life of it. If it’s a wet-cell battery, you may need to top it up with water to keep the fluid at the correct level.
You should also make sure your batteries are protected from significantly cold weather, particularly if you get cold winters, as this can also affect the performance and lifespan.
It’s possible with some batteries to leave them on a trickle charge, to keep them charging at a slow speed with a low amp charger. But it’s a good idea to check your batteries frequently, no matter where they’re stored, to ensure they continue to be in working order.
What Is The Lifespan Of A Battery?
Different battery types have different lifespans and the way in which they are treated can also have an effect on its lifespan.
Generally, a wet-cell battery will last anywhere from a year up to two years, with consistent use and frequent recharging. An AGM battery will typically last between 3 and 4 years and a lithium-ion battery will last around 10 years.
If you keep them stored in the recommended environment - cool and dry - you should be able to get the maximum life expectancy from any battery type.
You will usually find that batteries will last longer on a float cycle than a deep cycle. This is because the deep cycle use is much more demanding because of the frequent charging, draining and recharging that’s required.
Batteries will last significantly longer if they are only used for float cycle use, as they are not being subjected to constant recharging or damage sustained from overheating. However, for a trolling motor you will be more frequently using it in a deep cycle, unless you’re keeping one as a spare.
What Size Battery For Kayak Trolling Motor?
The size of battery you’ll need for your trolling motor will probably depend on a few things. Firstly, you may want to make sure that the battery you choose will fit in your kayak. Some fishing yaks may have battery compartments, so it can be a good idea to check the dimensions of the compartment if that’s the case. Note that a smaller battery (like you would use on a kayak), may not last as long as larger ones used on bigger boats.
You may also want to think about how much your battery weighs and whether or not it could impact your boat’s performance. You also probably don’t want to be carrying a heavy battery around with the rest of your gear.
It can be a good idea to make sure the battery type you choose is suitable for your trolling motor and with enough amp hours to run your motor for the length of time you want.
Usually, you’ll need a 12V battery for your 12V motor but remember to consider that you might need more than one battery if you’re using a 24 or 36 volt trolling motor.
Trolling Battery FAQs
What Size Battery Do I Need?
This will probably depend on the size of your trolling motor and how much power it requires to operate. It will also usually depend on how long you plan to power your motor and whether you will be operating it at full capacity or not. You can get a general idea by dividing the battery amp hours by the motor’s amps drawn to give you a length of time at medium speed.
A 12 volt battery is suitable for a 12 volt motor. For a higher voltage motor you will usually need two or more 12 volt batteries to operate safely. The physical size of the battery will usually depend on how much space you have available on your boat.
For most kayaks and canoes, one 12 volt battery may be all you have room for and is generally all that’s required for a 30 to 50 pound thrust motor.
If you have a larger bass boat, you may be able to accommodate three 12 volt batteries for your 100 pounds of thrust (or more) motor.
What Is A “Battery Reserve Capacity”?
This can be the same as amp hours but using different units. The battery reserve capacity is generally how many minutes it can operate at 25 amps before the voltage drops below 10.5 volts (from 12 volts).
How Do You Charge A Trolling Motor Battery?
You can use a battery charger to charge your trolling motor battery. There are various types, including on board and portable chargers. The charger can be connected to the terminals using the cables attached to the charger.
What Happens If The Battery Gets Wet? Should I Protect It?
If your battery gets wet, it’s not usually a problem as long as you dry the terminals right away to prevent corrosion. Saltwater can be more corrosive than freshwater. You can add a layer of protection to your battery by storing it inside a battery box. This can help to protect it from rain and spray for added safety.
How Often Should A Trolling Motor Battery Be Charged?
Ideally, you should fully charge your trolling motor battery after each use. It can also be recommended not to let your battery drop below 50%, as this can affect its lifespan and overall performance. Note that old batteries with a low deep discharge recover rate may require more watering and a higher amperage to get to the end of its charging cycle.
Why Are Deep Cycle Batteries Best For Trolling Motors?
Deep cycle battery technology is designed to handle the frequent charging and discharging that a trolling motor requires, similar to car batteries. It is also designed to deliver smaller amounts of current for greater length of time.
Now that you’ve read this article you should have a better grasp on the types of trolling motor batteries that are available. So hopefully you will be able to work out the best trolling motor battery for your specific requirements.
Choosing a power source for your trolling motor doesn’t have to be difficult. As long as you know the voltage of your trolling motor and the power that you’ll need for your boat then you should be able to make a good choice.
Just remember to keep in mind that if you’re in a kayak, battery size is important to keep your load as compact and lightweight as possible.
Also, by adding weight to your kayak or boat with a heavy battery it will also mean the motor will be pulling more weight, which could affect both your speed and the amount of hours you get from one charge.
So when you’re making the choice for the best batteries, make sure your power source meets the needs of both your motor and your boat but don’t forget to factor in the length of time you want to spend on the water, the frequency of your trips and how you plan to charge it.
Do you use a trolling motor? Which one do you have?