A Beginner’s Guide to the 10 Best Lightweight Trolling Motor Batteries

Do you need help with purchasing a good battery for your trolling motor? If so, you have come to the right place. In this article, we are going to talk about the top 10 trolling motor batteries and the lightest trolling motor battery available. Let’s get started.

Note: most links in this article are Amazon.com Affiliate links, see Affiliate Disclosure, thank you.

A Brief Introduction to Trolling Motor Batteries

Before we start listing the best trolling motor batteries available, it is important that you understand some key aspects of a trolling motor battery. This battery is significantly different than the starter battery used in your car.

A trolling motor battery is normally referred to as a marine battery or a deep cycle battery. This battery operates by discharging a small amount of current at regular intervals for a specific time period. This helps them use their electric charge more efficiently and helps run your trolling motor for hours. A deep cycle battery can be further categorized into two types:

  • A sealed AGM battery
  • A lead-acid wet cell battery

A lead acid wet cell battery is a traditional trolling motor battery. It makes use of electromagnetic plates that are submerged in an electrolyte fluid. This fluid is usually composed of sulfuric acid and water. It is important to maintain the fluid level for this battery. This can be done by adding distilled water, every time the fluid level decreases.

Make sure you don’t get careless about this aspect of battery maintenance. If the electrolyte fluid dries up to the point that the cells and plates get exposed, then the battery will get damaged. This type of battery is moderately priced and is very commonly used for trolling motors. It can last for 2 years.

An AGM battery is a type of battery that is completely sealed. This helps the battery maintain its charge for a longer period of time. It also extends its lifespan. They can last for as long as 4 years. However, they are also more expensive than a lead-acid wet cell battery.

Choosing the Lightest Trolling Motor Battery

Now that you have a brief understanding of trolling motor batteries let’s review some marine batteries that qualify as the “lightest trolling motor battery.” 

1. Mighty Max Battery ML18-12 12V 18AH SLA AGM Rechargeable Deep Cycle Battery for Electric Trolling Motor

Our Rating: 4.8/5

The first battery to feature on our list is the ML18-12 from Mighty Max. Mighty Max is a well-reputed brand for trolling motor batteries. Their products are well known for their quality and endurance. Their ML18-12 battery weighs only 12 lbs, which makes it the lightest trolling motor battery on our list.

The battery operates at 12 volts and has an amp hour rate of 18 AH. It is a sealed lead-acid battery that makes use of AGM (Absorbent Glass Matt) technology. In spite of the low amp hour rate, you can expect this battery to deliver a high-quality performance. It also recharges quickly. Since it is an AGM battery, you do not need to worry about maintenance. It comes with a 1-year warranty, and you can expect this battery to last for 3 to 4 years. That’s not a bad bargain considering the amount of convenience it offers at a reasonable price.

2. Mighty Max Battery 12V 35AH SLA Battery for Minn Kota Endura C2

Our Rating: 4.8/5

The second battery to feature on our list is the ML35-12 SLA by Mighty Max. This battery was launched in 2015. It is a sealed lead acid battery which is perfect for trolling motors. The battery makes use of AGM, as well as sealed lead-acid technology, and provides the best of both worlds. It has a calcium alloy grid that enhances its performance.

The use of calcium alloy also makes the battery more resistant to overcharging. The ML35-12 SLA operates at 12 volts and has an amp hour rating of 35AH. The battery is spill-proof and weighs 23.15 lbs. It also has a high discharge rate and can operate at a wide variety of temperatures.

You can recharge it by mounting it in any position. The battery is shock-resistant and comes with a 1-year warranty. The AGM technology, along with its valve regulated design, helps prevent any leaking of the electrolyte fluid. It also requires very little maintenance. Besides serving as a trolling motor battery, it can also be used for motorcycles, golf carts, medical mobility vehicles, etc.

3. Expert Power 12v 33ah Rechargeable Deep Cycle Battery

Our Rating: 4.5/5

Expert Power Inc. is another well-known company that has been producing batteries since 1987. Their rechargeable deep cycle batteries easily qualify among the lightest trolling motor batteries you’ll find. This particular battery by Expert Power uses state of the art Absorbed Glass Matt (AGM) technology. It operates at 12 volts and has an amp hour rating of 33 AH. It can run for several hours before you need to recharge it.

Like the Mighty Max batteries reviewed above, this one has a calcium alloy grid too. These batteries are also regulated through valves and require minimal maintenance. It is a little heavier than the Mighty Max battery and weighs 23.3 lbs. It can operate at a wide variety of temperatures and is perfect for use in a trolling motor. It comes with a 1-year warranty.

4. Expert Power EXP12180 Lead Acid Battery

Our Rating: 4.1/5

This is the second lightest trolling motor battery on our list. It weighs only 12.3 pounds. It was released in 2007 and is still the go-to choice for many boat owners. Backed by Expert Power Inc, you can expect this battery to give a reliable and consistent performance. It operates at 12 volts and has an amp hour rate of 18 AH.

The battery makes use of sealed lead-acid technology. The cover is made of ABS plastic. This is non-conductive and shock-resistant. It can also withstand exposure to heat and chemicals. The battery is vibration-resistant as well. If you are looking for something light, durable, and price-friendly, then this is one of the best trolling motor batteries available.

5. Expert Power EXP12200 12V 20AH Lead Acid Battery

Our Rating: 4.7/5

The EXP12200 is a winner in two departments. It is the third lightest trolling motor battery on our list. It is also very price-friendly. Given that it is a product of Expert Power Inc, you do not need to worry about compromising quality over cost. This battery makes use of the classic lead-acid technology.

It operates at 12 volts and has an amp hour rate of 20 AH. It can run for several hours before you need to recharge it. The battery’s capacity to hold a charge for a long period of time makes it an even more cost-effective purchase. It is also valve regulated and maintenance-free. The battery weighs only 12.5 lbs and comes with a 1-year warranty.

6. Optima Batteries 8027-127 D27m Blue Top Deep Cycle Marine Battery

Our Rating: 4.0/5

These batteries come with an innovative design that makes them distinct from other marine batteries. They employ AGM technology, but the makers have kicked things up a notch by making a few tweaks that add to their functionality. This is probably evident from the significant price difference between these batteries and the others on our list. They are ideal for trolling motors and can last very long.

The batteries have been designed using a spiral design, with the cells compressed tightly. This contributes to their prolonged life and durability. It also makes them vibration-resistant. These batteries are dual-purpose and can function as starter batteries, as well. They operate at 12 volts and have a reserve capacity of 25 amperes. This is particularly useful in an emergency and will give you an extended battery life of 2 hours and 20 minutes. The overall battery life of these batteries is 3 times more than your usual marine battery.

7. Sealed Lead Acid (AGM) Deep Cycle Battery by Interstate – DCM0035

Our Rating: 4.5/5

Produced by Interstate Batteries, the DCM0035 is a deep cycle marine battery that makes use of AGM technology. It is smaller than most marine batteries and weighs 23.8 lbs. It operates at 12 volts and has an amp hour rate of 25 AH.

Since it’s a sealed battery, you do not need to put in too much effort in maintenance. This battery is more suitable for small boats that do not have a lot of space for fitting in batteries.  It has a compact design and can help run your trolling motor for 2 or 3 hours. You can install more than one battery if you want to extend its lifespan before recharging.

8. Mighty Max Battery 12V 55Ah Deep Cycle Battery for Electric Trolling Motor

Our Rating: 4.5/5

This product by Mighty Max is heavier than most deep cycle batteries on our list. It weighs at nearly 39 lbs but is a lot more dependable than other smaller batteries. It is highly resistant to vibrations and can help you navigate choppy waters without losing its charge. If you run it on an intermittent basis, then you can get several hours of runtime before needing to recharge.

It is most suitable for pontoon boats, canoes, kayaks, and small fishing boats and works well with 30-pound thrust trolling motors and 45-pound thrust trolling motors. You can expect it to run for 4 hours before needing to recharge it. If you reduce the power usage to 25%, then you can get an additional runtime of 2 hours.  The battery comes with a 1-year warranty and does not require any maintenance. Make sure you check the charge level before recharging. The battery is sensitive to overcharging and may get damaged in the process.

9.  ML50-12 12V 50AH SLA Mighty Max Battery for Electric Trolling Motor 

Our Rating: 4.0/5

The ML50-12 SLA is a Mighty Max battery makes use of sealed lead acid and AGM technology. This battery is unique among those offering an amp hour rate of 50 AH and above. Most batteries in this category weigh between 40 to 60 pounds. However, the ML50-12 delivers 50 AH in spite of only weighing 30 pounds. You can think of it as the lightest trolling motor battery in this particular category.

It gives a high-quality performance and will allow you to run your motor for several hours before recharging. It is also highly resistant to shocks and vibration and can operate at a variety of temperatures. The battery comes with a 1-year warranty and will last you for at least 4 years before you need to replace it.

10. ML55-12 12V 55AH SLA Mighty Max Battery for Electric Trolling Motor

Our Rating: 4.1/5

The final product to feature on our list is the ML55-12 SLA Battery by Mighty Max. Like the ML50-12, this battery also makes use of sealed lead acid and AGM technology. It operates at 12 volts and has an amp hour rate of 55 AH. The best part is it weighs only 36 pounds, an impressive achievement for a trolling motor battery in this category.

The battery is spill-proof and does not require any maintenance. It has a high discharge rate and is resistant to shocks and vibration. It costs a little more than the other Mighty Max products featured here, but it is also very long-lasting. The battery comes with a 1-year warranty.

Click here for our article on Choosing The Proper Size Battery.

Special Feature: Lithium Ion Batteries for Electric Trolling Motors

So far, all the trolling motor batteries we reviewed employed AGM technology or lead-acid. These batteries are usually less expensive and long-lasting. However, we’d also like to discuss lithium-ion batteries.  These batteries tend to be very expensive (the price range can be anywhere between $700 to $1200). The upside is, they are also very lightweight and powerful. Let’s take a look at our top 3 lithium ion batteries:

1. RUIXU LiFePO4 12V 100Ah Lithium Iron Phosphate Battery 

RUIXU’s lithium-ion batteries can serve as a classic replacement for your lead-acid batteries. These batteries offer an amp hour rate as high as 100 AH. The incredible thing is, they weigh only 26 lbs! This makes them the lightest electric trolling batteries that use lithium-ion. They have incredibly long battery life (nearly 5 times longer than a traditional lead-acid battery). They also come with a 3-year warranty. The batteries also have a battery management system installed that offers circuit protection.

2. Battle Born Batteries BB10012 100Ah 12V LiFePO4 Lithium Deep Cycle Battery Bundle with Victron IP65 15A Bluetooth Charger

These lithium-ion batteries are equipped with state-of-the-art Bluetooth technology. They offer an amp hour rate of 100 AH and weigh only 30 lbs. The Bluetooth technology allows you to check the charge level of the battery through your smartphone, laptop, or tablet. You can also configure the charger settings using a smart app. These batteries can give a continuous output of 200 amperes and are incredibly long-lasting. They come with an 8-year warranty.

3. VoltXcell LiFePO4 12V 100AH Deep Cycle Lithium Battery

VoltXcell’s lithium batteries also deserve a mention. These batteries operate at 12 volts and have an amp hour rate of 100 AH. They are excellent with solar panels and weigh only 28 lbs. Like RUIXU’s batteries, these also come equipped with a battery management system. They can help run your trolling motor for several hours. The charging system is incredibly fast, as well. These batteries require no maintenance and will last you for many years.

Optimate LiFePO4 12V 5amp Battery Charger/Maintainer.

For most lithium batteries you should use a special battery charger. The Optimate charger is not the largest charger but will extend your battery life because it is full function. Additionally, because it is weatherproof and lightweight you can mount it in any boat for onboard charging.

Click here to read our review of Trolling Motor Batteries

Let’s Sum It Up

Choosing the right battery for your trolling motor is very important. It can help you get optimum performance out of your boat and also help you avoid an unexpected catastrophe. Here’s a quick recap of what you need to keep in mind when buying a marine battery for your boat:

  • The battery should be able to operate for more than 2 hours
  • External shocks or vibrations should not compromise the charge level of the battery
  • The battery should require little to no maintenance
  • It should have a reasonable amp hour rate that gives you a good output
  • It should not be too heavy for your boat

You must also keep an eye on the charge level when you set the battery up for recharging. Overcharging can shorten the life of the battery. It may damage it permanently as well. If you own a pontoon boat or a kayak, we strongly recommend you buy the lightest trolling motor battery available. This will help your boat function more smoothly.

For more interesting articles on trolling motors, visit DC Trolling Motor.