A trolling motor is an important part of any fishing boat because it allows anglers to move quickly and quietly through the water. However, a trolling motor is only as good as a battery. Without a reliable and efficient deep-cycle battery, your trolling motor won't be able to perform at its best. This guide will look at deep-cycle batteries and help you choose the right one for your trolling motor.

Understanding Deep Cycle Batteries

A deep-cycle battery is a type of battery that is designed to provide a steady and consistent flow of power over an extended period. This makes them perfect for use in things like trolling motors that need a steady power source. Unlike other types of batteries, designed for quick bursts of energy, deep-cycle batteries are built to deliver a slow and steady power flow over a longer period.

What are the pros and cons of deep-cycle batteries?

The main benefit of deep cycle batteries is that they can keep giving off power for a long time. This makes them perfect for use in things like trolling motors that need a steady power flow. They are also made to be used and charged many times. This makes them a reliable power source that will last long. On the downside, deep-cycle batteries tend to be heavier and more expensive than other types of batteries.

Common terms associated with deep-cycle batteries

  • Amp hours measure how much energy a battery can give off over a certain amount of time. The higher the amperage, the longer the battery will last.
  • Reserve Capacity: This is how long a battery can deliver a sustained flow of power before it runs out of juice.
  • Depth of Discharge: This refers to the percentage of a battery's capacity that has been used. For instance, a battery with a capacity of 100 amp-hours and a 50% depth of discharge has a 50% depth of discharge.

Things to think about when picking a deep-cycle battery for your trolling motor

There are a few things to think about when choosing a deep-cycle battery for your trolling motor:

Battery capacity needed for your trolling motor

The capacity of your battery will depend on the size and power of your trolling motor. You'll want to choose a battery with sufficient capacity to power your motor while on the water.

Battery size and weight

Size and weight are also important things to think about, especially if you have a smaller boat. You'll want to choose a battery that fits comfortably on your boat and is easy to move around if necessary.

Battery type

Several types of deep-cycle batteries are available, including flooded lead-acid, sealed lead-acid, AGM, and lithium-ion batteries. Each has advantages and disadvantages; the right choice will depend on your specific needs and budget.

Battery brand and quality

Choosing a well-known brand and high-quality battery is important to ensure your trolling motor has a reliable power source that will last a long time. Look for batteries with a warranty and a proven track record of performance.

Charging time and maintenance needs

It's also important to consider how long it takes to charge your battery and how much care it needs. Some batteries require more maintenance than others, and you'll want to choose a battery that is easy to charge and maintain.

Types of Deep Cycle Batteries for Trolling Motors

There are several types of deep cycle batteries available, each with its advantages and disadvantages:

Flooded lead-acid batteries

Flooded lead-acid batteries are the most common type of dakota lithium deep-cycle battery. They are affordable and widely available but require regular maintenance, including topping off the electrolyte levels and checking the water levels. They are also prone to spills and leaks, so they must be used and stored carefully.

Sealed lead-acid batteries

Sealed lead-acid batteries are similar to flooded lead-acid batteries, but they don't need to be maintained. They are sealed, so they don't require topping off electrolyte levels or checking water levels. They are also less prone to spills and leaks, making them a safer option for boating.

AGM (Absorbent Glass Mat) batteries

AGM batteries are sealed lead-acid batteries that use a special absorbent glass mat to hold the electrolyte. They cost more than flooded or sealed lead-acid batteries, but they don't need as much upkeep and can handle shocks and vibrations better.

Lithium-ion batteries

Lithium-ion batteries are a newer type of deep-cycle battery with advantages over traditional lead-acid batteries. lifepo4 battery’s are lightweight, have a longer lifespan, and can be charged faster. However, they are also significantly more expensive than other types of batteries.

Section 4: Maintenance and Care for Deep Cycle Batteries

To get the most out of your deep-cycle battery and ensure that it lasts as long as possible, it's important to take proper care of it. Here are some maintenance tips:

Proper charging techniques:

To keep your battery in good condition, it's important to charge it properly. Follow the manufacturer's instructions for charging your battery and avoid overcharging or undercharging it.

Maintenance requirements: 

Different types of batteries need to be taken care of in different ways, so make sure to follow the instructions from the manufacturer. This may include topping off the electrolyte levels, checking water levels, and cleaning the battery terminals.

Common issues and troubleshooting tips

If you experience problems with your battery, such as a loss of power or difficulty holding a charge, there may be an issue with the battery or the charging system. Check the manufacturer's instructions for tips on how to fix the problem, or think about getting a professional to fix your battery.

Safety precautions when handling batteries:

Deep-cycle batteries can be dangerous if mishandled, so taking proper safety precautions is important. Wear gloves and glasses that protect your hands and eyes, and don't smoke or use open flames near the battery.


Choosing the right deep-cycle battery for your trolling motor is important to ensure you have a reliable source of power on the water. You can choose a battery that fits your needs and budget by thinking about its capacity, size, and weight, as well as its type, brand, and quality and how it needs to be cared for. Take good care of your battery to ensure it lasts as long as possible, and always follow safety rules when handling batteries.