Best Marine Battery for Trolling Motor-Type and Cycle Life

Sep 15, 2021   Pageview:54

Your electric motor system's battery is a crucial component. Always choose a top-of-the-line deep cycle marine battery. Deep cycle marine batteries, unlike vehicle batteries, are meant to be depleted and then recharged.

Marine batteries are built expressly for use on boats, with thicker plates and more durable construction to withstand the vibration and hammering that can occur on any powerboat. As a result, marine batteries are typically more expensive than automotive batteries, leading to some boat owners opting for an auto battery over a marine battery.

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In this guide, you will get a better understanding of the Marine Battery for Trolling Motor-Type and Cycle-Life and about the best battery for a trolling motor.

Let's dive in!

What type of battery is best for a trolling motor?

A marine battery should be used to power a trolling motor since it will last longer and become more reliable than an automobile battery in a boat.

Marine batteries are divided into three categories:

●Marine Starting Batteries: They are intended to start the engine and quickly recharge the engine alternator. They offer brief but powerful bursts of energy over short periods. A starting battery should not power trolling motors and other appliances.

●Marine Deep Cycle Batteries: They're made to gently discharge over a long period and withstand hundreds of charging and discharging cycles. An electric trolling motor and other battery-driven equipment such as audio systems, a windlass, depth finders, fish locators, and appliances should all be powered by a deep cycle battery. Starting batteries should not be used in place of deep cycle batteries.

●Marine Dual-Purpose Batteries: They mix the performance of starting and deep cycle batteries, and they're a suitable solution for smaller batteries when two aren't possible. They can execute the functions of both a beginning and deep cycle battery, although they aren't as efficient as individual batteries.

The absence of proper charging is the leading cause of trolling motor battery failure. A 12-volt deep cycle marine battery is recommended with at least a 110 amp hour rating, often a group 27 size battery. You'll get more run time if the amp hour rating is higher. If an amp hour rating isn't available, choose a deep cycle battery with a minimum reserve capacity of 180 minutes.

In addition, we've discussed how to charge marine batteries. Let's see!

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●Charging a Marine Battery

Most of us are aware that the batteries included may not be of the highest quality when purchasing a new or used boat. We don't give them much thought if they appear to be doing their job. However, everyday heat is a significant adversary of batteries in hotter locations, reducing their lifespan significantly. In sections of the country where we must store boats for the winter, how the battery is cared for is equally crucial to extending its life.

When not in use, it's recommended to keep batteries charged on a regulated "trickle" charger. In cold temperatures, a battery that has not been charged (and kept charged) can freeze, resulting in a cracked case. A battery is similar to many other things in life in that it must be used or it will be lost. Because the automobile is used frequently and kept charged, a car battery will generally live longer than a boat battery. 

The adage that a battery has a two-year life span is pretty accurate when it comes to boats. You'll usually get a heads-up in the shape of a "dead" battery one morning or a slightly slower cranking speed than usual when it's about to give up on you. You plugin the charger, the battery springs to life, and you're off on your adventure. It's possible that a light was left on or that the radio memory reduced the voltage. The battery may be sulfating, the plates are deformed, and it no longer accepts or keeps a charge as well as it used to.

What is the best lithium battery for trolling motors?

Any deep-cycle 12-volt marine battery will power most electric trolling motors. However, lithium iron phosphate (LiFePO4) batteries have the longest operating duration and longevity. Here are five reasons why:

1.The run time of Lithium LiFePO4 batteries will be doubled to tripled. More fishing time equals more run time.

2.Lithium batteries endure longer and require fewer replacements. Increasing your lifetime worth and giving you peace of mind.

3.Lithium batteries are 60% lighter than deep cycle lead-acid batteries. More maneuverability and speed come with less weight. When it comes to charging the batteries, they are also easier to transport.

4.lithium iron phosphate works at minus 20 degrees Fahrenheit (minus 29 degrees Celsius), so you can use it to power your boat in the summer and your ice fishing gear in the winter.


5.When you use a Lithium battery, you require fewer batteries. The voltage curve of lithium iron phosphate is flat. It means that the voltage of the battery does not drop as you use it. You've drained every last drop of juice. Historically, when using a deep cycle lead-acid battery to power a trolling motor, you could only use half of the battery's capacity before the voltage became too low to run the motor. You can use all of the battery's power with Lithium. Therefore a 100 Ah Lithium battery is equivalent to 200 Ah with lead-acid batteries.

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

With the specified 50 percent Depth of Discharge, a 100Ah 12 volt deep-cycle lead-acid battery can run a 400W continuous DC load for 1.5 hours. A 400W rated AC fridge can be run for 15 hours on a 100Ah 12 volt deep-cycle lead-acid battery at a rate of 40 watts per hour.

Here are some tips to remember when using the battery.

●Mixing different types of batteries or old batteries with new ones is never a good idea.

●After each usage, charge the batteries as quickly as possible; leaving them depleted reduces their longevity and performance.

●Check the level of wet-cell battery fluid regularly and top it off as needed.

●Periodically inspect terminal connectors for signs of corrosion and clean with a baking soda and water paste.

●Maintain a trickle charge and store batteries in a cool, dry place during the off-season.


If you plan on going out for a whole day of fishing, you'll need an excellent trolling motor that won't die on you before noon. You can operate it for a long time if you use a marine battery. We've covered marine batteries, what type of battery is best for a trolling motor, and how long a 100AH battery can run a trolling motor in this guide. Read the entire guide and learn everything there is to know about Marine Batteries so that you can put your knowledge to the best possible use.


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