Best Trolling Motor Battery in 2021 – Unbiased Reviews & Comparison

A trolling motor is quite useful on a boat as it eliminates the need to paddle around. You have the freedom to move at varying speeds so that you can catch the fish.

Unfortunately, it is virtually useless without a battery. A trolling motor battery makes it easy for you to move on the water for hours and even power the gadgets you have on board.

Below, I have provided a list of the best trolling motor battery available on the market based on their capabilities, capacity, performance, size and weight, among other factors.

Additionally, we’ve gone a step further and listed both the pros and cons of each battery in an effort to help you make an informed decision on the best choice for your next trolling motor battery.

Top 7 Best Trolling Motor Battery

1. Mighty Max Battery 12-V 55Ah Boat Pontoon Electric Trolling Motor

This Mighty Max is a great choice for those who spend hours on the water at a time. The battery offers you enough power to sustain your fishing even when you are driving at high speeds. This is like an upgrade from the 35 Ah model from the same manufacturer.

This comes handy when you are running a 30-lb trolling motor. It can last you up to 4 hours when trolling at top speed. When the speed is lowered to a minimum, the boat can stay on the water for up to 6 hours.

However, this battery is relatively bigger. However, it still remains within the range of not being bulky by measuring approximately 9.02 by 5.43 by 9.1 inches. It is also up to 14 pounds heavier than the 35 Ah model, bringing its weight to 38.6 lb.

This is a sealed lead acid rechargeable battery that does not require any maintenance. It is a spill-proof battery that is designed with a high discharge rate characteristic. You can operate it on a wide range of temperatures without worrying about its functional life. Even better, it recovers easily from deep discharge.

The unit resists vibrations and shock, meaning that you can mount it in any position. On purchase of this trolling motor battery, you are offered a 30-day refund policy with a 1-year warranty.

Seeing that it is a heavy duty battery if you drain it fully, the battery takes up to thirty hours to recharge fully on a trickle charge. The extra load on this battery may be too much for a small kayak. Ergo, you will need to use it on bigger boats that require more power to operate.


  • More time in the water at fast speeds
  • You can set it at any angle depending on the application
  • Highly resistant to vibrations and shock
  • Long lasting in extreme temperatures


  • Takes up to 30 hours to recharge if fully drained

2. VMAXTANKS VMAX V35-857 12 Volt 35AH AGM Battery

The VMAXTANKS Vmax857 is created differently from all other trolling motor batteries. The chemical structure of its plates and the physical design makes it unique.

VMAXTANKS follows special manufacturing processes to give their batteries stealer reliability, strength and durability and high performance to exceed the conventional Pb-Ca plates currently on the market.

This unit is designed with Absorbed Glass Matt between the plates to enhance its physical and electrical potential. This places it a notch higher than the wet lead acid batteries and ups its resistance to shock and vibrations.

Like the Mighty Max Battery before it, you can fit this battery anywhere on your kayak as it operates in extreme weather and rides conditions.

Seeing that the electrolyte will be absorbed by the AGM, this unit falls into the category of non-spillable and non-hazardous batteries. The plates are sealed in a tough tank that ensures the unit is delivered maintenance free.

Even better, this tank enhances the lifespan of the unit, making it resistant to scratches. Besides being a long lasting unit, these batteries are fancied by users thanks to their and ability to recover from deep discharges.

When fully charged, the battery can last up to four hours on 40 pounds trolling motor and up to 9 hours on 18 pounds trolling motor. The unit measures 7.7 by 5 by 6.1 inches.

This gives it a compact size that makes it easy to move from place to place and easy to connect. Designed with lead-tin alloys, the unit offers better performance. Even better, it will charge in half the time it takes to charge a standard battery.


  • Lightweight and compact construction
  • Has enough juice to power a throttle motor for several hours
  • Spill proof and can be set at any angle
  • Sturdy and durable


  • Costs more than other batteries with similar features

3. Optima Batteries 8016-103 D34M Deep Cycle Marine Battery

Optima is a trolling batteries manufacturer that has been in the industry for a long time, making them popular. All batteries from Optima are color coded.

The 8016-103 D34M is coded BlueTop, showing that it is to be used as a dedicated starting battery. This is offered in a light grey case, unlike other variants that come in a dark grey case. Given, you can use the unit for starting as well as for deep fish finder sessions.

This is a 12-volt battery with 750 cold cranking amps. You will love its compact size at 10 by 6-7/8 by 7-13/16 inches. It weighs 43.5 pounds. This is relatively heavy, but its performance allows it a heavier weight.

It is designed with AGM technology, making it non-hazardous and non-spillable. This makes it maintenance free and safe. It is completely encased, leaving you no space to add distilled water.

Given that the unit is completely sealed in a tank, it is highly resistant to vibrations. You can mount it on any part of your kayak as it operates swiftly in low and high temperatures. The tough outer casing makes this unit durable.

The 55Ah battery will never run out of optimal starting power even when the weather condition is bad. Better still, it reserves up to 120 minutes of constant performance power. You can use this battery for more than 4 hours on top speed.

When used at 80 degrees Fahrenheit, the battery discharges 25 amps for 120 minutes and then the voltage drops to 10.5 volts. To charge up to 90 percent, you will only need 35 minutes with 100 amps.

Optima batteries are relatively expensive, but their quality is great. To ensure the battery serves you for long, use it with the recommended charger and follow the charging instructions.


  • Doesn’t take long to recharge
  • Designed as dual purpose battery with Spiral Cell and AGM technologies
  • More than 15x vibration resistance compared to standard batteries


  • Easy to overcharge the battery if you don’t have the right charger

4. Optima Batteries 8027-127 D27M Blue Top Starting and Deep Cycle Marine Battery

The Optima D27M is a dual purpose 12v battery with a cold cranking amperage (CCA) of 800Amp. It can be used for both starting your trolling motor, as well as deep cycle operations.

By using the company’s patented Spiral Cell technology, the marine batteries are capable of quick recharge times and longer life spans than conventional batteries.

Measuring 12.19″ x 6.81″ and a height of 8.75″, the Optima blue top battery weighs 53.8Ibs (approximately 24.4kgs). Though this seems heavier than previous Optima battery models, the marine lead battery reserves its capacity for longer.

It can retain its capacity at 25Amps for up to 140 minutes while most other batteries die out at less than 120 minutes.

Mainly built from polypropylene, the Optima battery is weather proof allowing optimal power to start your motor even in less than ideal weather. It has a tightly sealed polypropylene case that keeps the plates safe even during the boats impact in rough waters.

By keeping plate movement to a minimum, Optima manages to increase the battery’s life span. The robust build also ensures that boat users need not worry about acid spills and leakages.

Thanks to its sturdy, maintenance-free design, boat owners will not be required to clean its terminals. The battery can also be mounted topside or below making adaptable to a myriad of boat designs.

Left unused, most batteries discharge rather quickly and are flat in a few months. However, stored correctly (kept at room temperature), Optima’s blue top D27M is capable of retaining the charge for up to a year even when not in use.

With an internal resistance of 0.0025ohms, recharge time is kept to a minimum.


  • Huge cold cranking power (1000amps)
  • Good reserve capacity
  • Compared to other marine batteries, the Optima D27m blue top can be recharged up to 3 times more
  • Offers 15 times more vibration resistance than most of its competitors
  • Robust, spill-proof build, mainly made of polypropylene
  • Can be mounted in any position


  • The battery offers dual-purpose use for starting and deep cycle applications

5. Mighty Max 12V 35AH Light Trolling Motor Battery

To complete our trolling motor battery reviews, is the sealed lead-acid (SLA) Might Max ML35-12, heavy duty battery. Like the UB121000, the 12.5v battery uses AGM technology in that the electrolyte is held in glass mats – different from flooded lead-acid batteries that freely flood the plates.

The result is a superior performance from the battery than one would get from a lead-acid or lithium-ion battery.

Rated at 35AH, the battery can maintain charge above 40% while outputting 252 watt-hours. This gives it a 6% constant rate of discharge, which is quite efficient.

In keeping with its competitors, the ML35 battery can operate in a wide range of operating temperatures. A sturdy build and SLA/AGM technology allow the battery to also be used in any position without risk of leakage or spillage. Moreover, it is capable of resisting shock and vibration while in use

Measuring 7.68″ x 5.16″ x 7.13″, the lightweight trolling motor battery has found its way to consumer electronics as well Its 23.15Ibs (approximately 10.5kg) and heavy-duty nature allows it to be used for emergency lights, golf carts, portable tools among many other applications.

It will surprise your that a Mighty Max’s ML35 will suffice for a 301b thrust Minn Kota trolling for 2-3 hours for a total capacity of about 400Ibs. This is all at relatively high speeds! Quite a performer.


  • Small sized battery adaptable to multiple applications
  • Maintenance free battery
  • Spill-proof, vibration and shock resistant deep cycle battery

6. Optima Batteries 8006-006-FFP 34M BlueTop Marine Starting Battery

This is a mid-sized marine starting battery that is designed for use in small boats. The battery is powerful enough last you more than four hours on 40-pound motor trolling motor.

This Optima battery comes with 800 cold cranking amps and 100 minutes reserve capacity, allowing you to power other electrical equipment besides the motor.

It is designed with a strong plastic cover like other Optima batteries. This keeps it safe from bumps, scratches, and damage. It is highly resistant to vibrations, making it ideal for use on your boat.

The battery weighs only 38.4 pounds, making it a lightweight battery. It is 10 inches long and a little under 8 inches in height, ensuring it does not take up a lot of space.

However, this battery is not designed for deep cycle use. It has enough power for cranking and starting, but that is all you can do with it.

The battery uses SpiralCell technology, like other Optima batteries. This ensures that the battery stays on charge for long; up to three recharges as other batteries in its class.

Besides charging it, this battery does not require any maintenance. The thick and tough plastic case ensures that this battery withstands the weather.

The battery uses AGM technology, making it safe for use. However, you will need to be careful when charging this battery thanks to the same AGM technology.

Of the many available batteries in the market today, the three described above would probably give you the best value for your hard earned money. Saving up to buy a trolling motor battery is mandatory for any angler boat or motor propelled kayak.

These specially designed batteries would keep you moving for longer periods than can be achieved by other battery technologies. Many-a-novice have tried using car batteries for anglers. This would require you to replace your battery 3-4 times as frequently as a trolling motor battery.

Used properly, a good trolling motor battery can give you service for about 6 years before requiring replacement, making them a good investment. This includes good practice such as not allowing your battery to deplete charge completely before recharging.

All in all, while shopping for a battery, keep your boat’s weight, fishing style, type of climate and motor power needs in mind.


  • High quality and durable construction
  • Charges quickly and powers your boat for longer
  • Low maintenance and spill-proof
  • Quite reliable even in harsh conditions


  • Expensive that batteries with similar features

7. Minnkota Trolling Motor Power Center

The MinnKota Trolling Motor Power Center measures 14.9 x 8.7 x 15 inches and at around 1pound, it is a pretty compact and lightweight unit. It is one of the ideal battery holders on the market and excellent for smaller boats that don’t have a battery compartment.

It will store your battery securely and save you plenty of space in the process. Its unique design allows you easy access to the battery terminal. You can, therefore, connect the leads of the charger without having to open the box.

This battery holder also comes with an inbuilt meter that measures and displays the current battery charge during any situation. You can utilize this power center for any battery of group 24 and 27 sizes. Another factor that makes it popular is that it comes with a few useful accessories.

Such include a couple of 12-volt plugs and two circuit breakers i.e. a 15-amp breaker for the plug and a 60-amp breaker for manual reset.

The plastic material used for construction is quite durable, but not the best for heavy-duty batteries. You will need to lock the strap of the web once the battery is inside the case. The buckle system on the strap handles weight well and remains tightened even when the flexes at the top become loose.


  • Easy access to external battery terminals
  • Two manual circuit breakers provided
  • Has a built-in battery meter for monitoring charge


  • Doesn’t handle very heavy batteries well

Things To Consider Before Buying The Best Trolling Motor Battery

Choosing the best trolling motor batteries requires more than looking at just the battery brand, price, and it features. In addition to the above expert guide, the following specific factors will help you narrow down your choices.

Best Trolling Motor Battery

Absorbed Glass Mat

This innovation involves the use of a substance that is similar to a gel and a glass plate. Manufacturers use it to eliminate the need for adding distilled water by ensuring that the batteries are completely enclosed.

Batteries with this technology last up to 3-4 years longer than ordinary wet cell batteries. Unfortunately, this also means that they are more expensive.

Wet-cell Batteries

These are the basic deep-cell marine batteries and are durable enough to handle repeated series of charges and discharges. They require a little more maintenance and are more affordable to AGM batteries.

In addition, wet-cell batteries don’t last long and need to be replaced every 1-2 years.


Using a large battery is good for someone who owns a large boat. However, smaller boats are easily weighed down by the weight of larger batteries. That said, you may want to limit the weight to 40 pounds if you own a small boat.


Some batteries are designed to power onboard gadgets while others are for starting the motor. The battery you choose for your trolling motor should be able to work for other applications including motorcycles, jet skis, RVs, scooters, wheelchairs and more.

Vibration Resistance and Durability

Given the fact that there’s always a chance of finding yourself on choppy waters gears, it’s important to remember that intense vibrations caused by rough waters can damage your battery.

Some models have a higher resistance to vibrations compared to others. Depending on what your budget is, ensure that you purchase the most durable battery you can afford.


A battery that only lasts 6 months won’t do you any good. And while manufacturers make claims about their product lifespan and durability, it’s good to remember that warranties don’t always back those claims.

Reserve Capacity

Depending on how long you plan on being on the water, you will need a battery that can power your boat for longer. The last thing you want is to take a day off from fishing because your battery isn’t charged or worse, get stuck on the water because the battery ran out of charge too soon.

Type of Battery

Wet-Cell batteries are common deep cycle marine batteries. They are relatively affordable and durable to withstand frequent drains and recharges. Unlike other batteries, you will need to maintain these batteries by topping them up with distilled water. You will replace these batteries every year.

AGM batteries are quickly gaining traction. AGM batteries, short for Absorbed Glass Matt batteries, use a glass plate and a gel-like substance. They are maintenance free batteries as they are completely enclosed.

They are comparatively long lasting as they can serve you for up to 4 years. Given their durability and maintenance-free nature, the batteries cost twice as much as wet-cell batteries.

Lithium-ion batteries are common on smartphones, but there are advanced versions that can be used to power trolling motors.

These batteries are great as they can serve you for up to 10 years when kept in temperatures below 105 degrees Fahrenheit. However, these batteries are extremely expensive to match their quality.

Maintenance Tips for Trolling Motor Battery

Anyone who depends heavily on trolling motor batteries should know the basics of maintenance. The reason is that these batteries need to be well taken care of to ensure optimum performance. Regular maintenance also prevents extensive damage and saves you money in the form of repair or replacement expenses.

New Batteries

Every new battery should be cycled several times before reaching capacity, preferably 20-50 cycles. It’s important that you limit how deep you discharge a new battery. It should be treated like a baby that needs to be nurtured into a rhythm.


The water you use to replenish your battery should be treated not to exceed 200TDS. It’s also important that you take extra care not to use water with iron. Always opt for distilled water rather than spring or tap water.

Discharging Battery

Never discharge your battery below 80%. This also applies to deep cycle batteries that are designed to be charged and discharged over and over. Anything past 80% only works them harder, thus increasing the risk of sulfation of battery plates.

Regular Battery Testing

Testing your battery at least four times every year is a good way to identify potential and existing problems. Check the hydrometer readings for indication of true charge and balance.

The voltage will let you know if your battery is still strong or needs replacing. Load testing is another good way of knowing if a cell is good or bad.

You will need to maintain it for durability. To do that:

  • Give your battery cool-off time after charging
  • Let the battery charge less for the first few days until it attains its full capacity
  • Avoid using the wrong battery charger, especially using a wet battery charger for other types of batteries
  • Use a voltmeter to check the performance of your battery at all times when charging and discharging Recharge your battery as quickly as you can after use
  • For wet cell batteries, when you need to top up water, only use deionized or distilled water
  • The top of your battery must remain dry and without dirt
  • Your cables and connectors need to be cleaned often
  • Before you charge your battery, ensure that the electrolytes level is lower than the split ring splash barrel

Safety Tips

  • Don’t use a mismatched charger: An oversized charger will cause gassing, thermal runaway and in extreme cases, explosion. An undersized charger, on the other hand, won’t be able to get the job done regardless of how long you try.
  • Like muscles, batteries need to be used regularly. Alternatively, you can give them a boost charge if they sit for a few months without any use. This is because inactivity harms them.
  • It’s important to remember that as they get older, the maintenance requirements of batteries change.
  • Gassing voltage goes up and so does the specific gravity.
  • This ultimately means higher amperage at the end of charge and longer charging periods.
  • In addition, older batteries need to be watered more often. Otherwise, their capacity will decrease.


For trolling motor batteries, performance and reliability go hand in hand. Batteries that offer you long functional life and with high power will cost comparatively high, but they are worth the price. If the right battery is chosen for the right purpose, the battery will get the job done. These batteries can be used to start your boat, run it and even run other onboard equipment.

Choosing the best battery for trolling motor requires being keen, consider the needs and size of your boat, consider your budget and then go out shopping. Even after you have chosen the best battery for your boat, it is pertinent to keep it maintained.

While a battery may be good for one person, it may not meet all your needs. As such, you need to consider all factors as expounded above.

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