Tips to choose Trolling motor battery | In-Depth Review

One of the most important parts of any electric motor system is its battery. When it comes to picking trolling motor batteries, you may feel it hard because of the varieties available. The best size of trolling motor battery is the one having a 12-volt capacity with at least 110 amp hour rating with a group 27 size.

Normally, trolling motors become dull or useless just because we are unable to access the right battery. In turn, the batteries will not get properly charged and make it hard for you to use them for the smooth working of your boat. Here in this article, we are going to explore the answer to “What size battery for trolling motor” is the best in detail. We have also covered some best batteries for trolling motors in another article. You can check it out as well.

Additionally, we will show you what factors you need to keep in mind while looking for the best trolling motor battery. In the following sections, you will get a step-by-step guide to all the important points that will help you to pick a deep cycle trolling motor battery. Let’s get started and explore what you need to look at while picking a trolling motor battery.

What to look for while picking a battery for trolling motor?

When it comes to choosing a battery for an electric boat motor, the very first question that comes to mind is what size battery for trolling motor would be a good choice. It is because you might be thinking that a small trolling motor battery would be good for the smooth working of the boat.

We all know that choosing the right battery and size for a sailboat is the most important thing. But the problem is still there because you don’t know exactly about the size of the battery and other factors that you have to consider. Here we have enlisted a few steps or factors that you should consider while looking for a trolling motor battery.

Size & Weight of the boat

Mostly, we consider a lightweight trolling motor battery because we think it matters a lot. Keep in mind that the size of the boat matters more than the size of the battery or motor. It is because if you have picked a lower-capacity motor, it will never let you enjoy the ride for your boat.

Also, you may have to face instant battery dropping due to inappropriate capacity. For example, if you have installed a 12-volt trolling motor battery inside your heavy boat, it will not work smoothly because the motor will not work finely.

Along with this, the efficiency of the motor or battery depends on the trolling speed. You will get a lot of choices available on the market but before buying a battery, you should need to check the instruction or recommendation page.

It will let you know whether the size and weight of the boat will be compatible with your battery capacity or you need to change it. If you are confused about power, you have to check the quantity with Pounds of thrust which is a common unit used for this.

Motor Capacity

If you have been in this field for a long time, you must have gone through the marine battery group size chart to estimate which battery is good for which motor. It is because batteries should be perfect in power with the motor capacity to keep your boat in perfect condition.

Along with this, motor capacity will let you know what size battery for trolling motor should you need to buy. By having a look at this section, you will be able to know the trolling speed of the motor with your finalized battery.

In turn, it would not only let you understand the battery for your boat but also let you know how much you will be able to use that boat with a single charge. According to many experts, it is recommended to pick a 12-volt marine battery for trolling motor to enjoy smooth rides using your boat.


Batteries are considered the core section of many electric appliances. Without efficient batteries, you will not be able to use that specific appliance for a long time. Sometimes, you may have picked batteries that are not long-lasting and you have to change them after a few months.

Keep in mind that you have to use your prominent amount of savings to buy batteries for trolling motor. That is why it is important to get an idea about the long-lasting of the finalized batteries. By keeping the above factors in your mind, you will be able to pick the best trolling battery for your boat.

But the question is how to get an estimated lifespan of a battery for trolling motor. This is where you will find the following section beneficial to you.

Type of battery

When it comes to discussing the long-lasting of a battery for a motor, the first thing that comes to mind is the type of battery. Yes, there are different types of batteries available in the market that you need to choose from.

Every type of battery will provide you with smooth services for a different time. So, you have to choose it carefully just according to your usage and requirements. Here we have listed the most common types of batteries used around the globe.

  • Lead Acid Wet Cell

Whenever you will search for what kind of battery for trolling motor you should buy, you will get this type on the top of almost every page. It is because Lead Acid is considered the deep cycle trolling motor battery available in the market.

By using this type, you will be able to overcome issues like instant recharging and power draining. Along with this, you will find them cheaper than the other types mentioned below. Normally, you will be able to use this battery for 2-3 years without facing any issues.

  • AGM battery

AGM is an extended form of lead-acid batteries that are sealed properly and completely. Due to complete sealing, this type of battery will work for a long time even with a single charge. Along with this, the lifespan will be longer than traditional lead-acid batteries.

So, you can say that it will enable you to push trolling motor to work fast for a long time. The only issue that you may have to face is the price. Yes, the cost of this battery would be around two times more than the traditional lead batteries.

  • Lithium Battery

If we say that it is the most rapidly growing type of battery, it would be right. Lithium batteries are not only used for trolling motors but also used in other sections related to electric appliances. There are several reasons behind its popularity.

First of all, you will find it lightweight trolling motor battery that makes it simple for you to use it fearlessly. By using such batteries, you will be able to reduce 70% of the weight of the entire boat. Secondly, these batteries have a significant lifespan as compared to both above types. So, you can say that it would be a perfect choice for you to choose from all types of batteries for trolling motors.


How long will a 100Ah battery run a trolling motor?

A 100Ah battery can run a 30lbs trolling motor for 4 hours with a speed of 4. The speed and time may vary with the material or type of battery that we have mentioned above.

How many amps does a 40lb thrust trolling motor use?

A battery with this weight can work on 29-31 amps/hr which is not enough when compared with motors used in different electric appliances.

Can you use a regular battery for a trolling motor?

Normally, it is not recommended because a normal battery can’t work smoothly over a long time. But if you have any issues, you can use a regular battery instead of a deep cycle battery for a short time.

What kind of battery for trolling motor should you buy?

We have mentioned it in detail regarding what to look for while picking a battery for trolling motor. Also, we have discussed the types of batteries in the above sections. You can read it carefully and estimate which battery you should buy for your boat.We have also provide some detail reviews of some best trolling motor batteries.

Final Wrapping

In the above sections, we have properly discussed what size battery for trolling motor should be the best to choose. Also, you must have learned about the factors that you need to know or keep in mind while choosing a battery for your boat.

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Kaitlyn Kris
Kaitlyn is a real powerhouse when it comes to content. She’s been working as our content editor since she joined the team – and ever since, we’ve seen a huge improvement in the quality of our blog. Kaitlyn brings an incredible wealth of knowledge to everything she does. From her sharp eye for detail that catches even the smallest errors, to her vast understanding of the industry and how to apply it through content creation. She’s always looking for ways to improve our blog and make sure the content is engaging, informative and accurate.

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