What Type of Battery Does a Trolling Motor Use?

What Type of Battery Does a Trolling Motor Use?When it comes to choosing the right battery for your trolling motor, there are several types available on the market. Each battery type has its advantages and drawbacks, which you should consider before making a purchase.

Some of the most common types of batteries used for trolling motors include lead-acid, lithium-ion, and AGM. Understanding the differences between these batteries is essential to ensure that you choose the right battery type that meets your needs and budget.

Lead-acid batteries are one of the most popular choices for trolling motors, thanks to their affordability and reliability. These batteries are designed to deliver a consistent flow of power over an extended period, making them ideal for deep cycle applications. Lithium-ion batteries, on the other hand, have gained popularity in recent years due to their lightweight design and high energy density, providing longer run times and faster charging capabilities. An AGM battery is a type of lead-acid battery that is sealed and maintenance-free, offering the benefits of both lead-acid and sealed design.

In this article, we will explore the different types of batteries used for trolling motors, their advantages and disadvantages, and which one might be the best match for your specific needs. Let’s dive in!

Lead-Acid Batteries

Lead-acid batteries are a commonly used and affordable option for powering trolling motors. These batteries are known for their ability to deliver a consistent flow of power over an extended period, making them ideal for deep-cycle applications that require sustained energy output.

There are two types of lead-acid batteries available for trolling motors: flooded and sealed. Flooded lead-acid batteries are the most commonly used type due to their low cost and easy availability. They require regular maintenance, including re-filling of water levels and protection against overcharging, which can damage the battery and reduce its lifespan.

Sealed lead-acid batteries, also known as valve-regulated lead-acid (VRLA) batteries, are maintenance-free and do not require periodic water addition. They are sealed to prevent any gas or electrolyte leakage and are safer to use in enclosed spaces. However, they are more expensive than flooded batteries and have a shorter lifespan.

Deep-Cycle Battery for Trolling Motor

The most important factor to consider when choosing a lead-acid battery for your trolling motor is whether it is a deep-cycle battery. Deep-cycle batteries are designed to deliver sustained power output over an extended period, making them ideal for trolling motors that require a continuous supply of energy.

Compared to starting batteries, which provide a short burst of high power output, deep-cycle batteries can deliver a steady flow of power for hours without losing their capacity. Deep-cycle batteries are also capable of discharging more deeply than starting batteries without damaging the battery or affecting its longevity.

Battery Type Advantages Disadvantages
Flooded Lead-Acid Low cost, easily available Requires regular maintenance, prone to overcharging
Sealed Lead-Acid Maintenance-free, safe to use in enclosed spaces Expensive, shorter lifespan

Overall, lead-acid batteries are a reliable and affordable option for powering trolling motors, especially for those on a tight budget. Choose a deep-cycle battery for superior performance and longevity. However, be aware of the maintenance requirements and potential risks associated with flooded lead-acid batteries.

Lithium-Ion Batteries for Trolling Motors

Lithium-ion batteries have emerged as an alternative to lead-acid batteries for trolling motors due to their lightweight design and high energy density. These batteries use a lithium-ion cell chemistry that allows them to store and deliver higher amounts of energy with less weight compared to lead-acid batteries.

One of the most significant advantages of lithium-ion batteries is their weight. They are up to 60% lighter than lead-acid batteries, making them an excellent choice for those looking to reduce the overall weight of their trolling motor setup. This feature is particularly beneficial for kayaks and small boats, where the overall weight of the vessel can significantly affect performance.

Another advantage of lithium-ion batteries is their longer-lasting power. They have a higher energy density than lead-acid batteries, meaning they can store more energy in the same amount of space. This feature allows them to provide longer run times and faster charging capabilities, making them ideal for anglers who need more power and longer runtime from their trolling motor.

However, it’s essential to consider that lithium-ion batteries come with a higher price tag than lead-acid batteries. They are an investment, but their lifespan and performance can make them worth the initial cost. Lithium-ion batteries also require a specialized charger, which adds to their overall cost.

When choosing a lithium-ion battery for your trolling motor, consider the voltage and amp-hour (Ah) rating. The voltage will depend on the requirements of your trolling motor, while the Ah rating will determine how long the battery can provide power. Make sure to choose a battery with enough voltage and Ah rating to meet your needs and ensure optimal performance.

AGM Batteries

AGM (Absorbent Glass Mat) batteries are a popular choice for trolling motors due to their sealed and maintenance-free design. The electrolyte in AGM batteries is absorbed into fiberglass mat separators, preventing spilling and leaks, which makes them an ideal choice for boating and marine environments where rough conditions are common.

AGM batteries deliver high currents and can withstand deep discharges, which makes them suitable for demanding trolling motor applications. Compared to flooded lead-acid batteries, AGM batteries offer better resistance to vibration and shock, which makes them more durable and ensures a longer life span.

Advantages Disadvantages
Sealed and maintenance-free More expensive than flooded lead-acid batteries
High resistance to vibration and shock Not as lightweight as lithium-ion batteries
Long-lasting power

AGM batteries are more expensive than flooded lead-acid batteries but offer superior performance in terms of longevity, safety and reliability.

When choosing an AGM battery for your trolling motor, consider the required capacity, voltage, and terminal type. Ensure the battery is compatible with your trolling motor and charger to avoid any compatibility issues.

Overall, AGM batteries are an excellent choice for those who want a sealed and maintenance-free option that is durable, reliable and delivers high performance for their trolling motor.


In summary, selecting the suitable battery for your trolling motor is crucial to achieving maximum performance on the water. After exploring the different types of batteries available for trolling motors, you can decide on the one that best fits your needs and budget.

Consider Your Trolling Motor’s Energy Demands

It’s crucial to think about the amount of power your trolling motor requires before selecting a battery. Deep cycle batteries, such as lead-acid or AGM batteries, are ideal for long-lasting power requirements. If weight is a concern, lithium-ion batteries provide a lightweight and long-lasting power supply.

Weigh the Pros and Cons of Each Battery Type

Each battery type comes with its unique features, benefits, and drawbacks. Lead-acid batteries are affordable and reliable, but they require occasional maintenance. Lithium-ion batteries are lightweight, long-lasting, and recharge quickly, but they are more costly. AGM batteries combine the benefits of lead-acid batteries and a sealed design, but they are heavier than lithium-ion batteries.

Choose the Right Battery Type for Your Needs

Ultimately, selecting the right battery type for your trolling motor depends on your specific needs, budget, and preferences. Consider the power demands of your trolling motor, the duration of your fishing trip, and the type of water you’ll be fishing in. Make an informed decision based on your research and considerations to ensure an enjoyable and successful fishing experience.

Richard Dodds

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