Best Deep Cycle Battery For Trolling Motor


Trolling motors are essential for many fishing enthusiasts, providing a quiet and efficient way to navigate through the water in search of the perfect catch. One of the most important components of a trolling motor is the deep cycle battery that powers it, ensuring the motor can last for hours on end. In this blog post, we'll discuss the best deep cycle batteries for trolling motors, as well as the factors you should consider when choosing one.

What is a Deep Cycle Battery?

A deep cycle battery is a type of lead-acid battery specifically designed for continuous use and supplying a steady amount of power over a long period of time. These batteries are different from starter batteries, which are built for short bursts of energy needed to crank an engine. Deep cycle batteries have thicker plates and are built to withstand repeated charge-discharge cycles, making them ideal for use with trolling motors.

Top 4 Deep Cycle Batteries for Trolling Motors

To help you find the best deep cycle battery for your trolling motor, we have narrowed down the top choices available in the market today:

1. Optima Batteries D31M BlueTop

Optima Batteries D31M BlueTop is a popular choice among anglers because of its high-performance and durability. This 12-volt battery has a 75 Ah rating and a 155-minute reserve capacity, ensuring long-lasting power for your trolling motor. The spiral cell design and pure lead plates make it more resistant to vibrations and corrosion, guaranteeing a longer lifespan compared to other models.

2. VMAXTANKS MR127 Deep Cycle Battery

VMAXTANKS MR127 Deep Cycle Battery is a heavy-duty AGM (Absorbent Glass Mat) battery designed for trolling motors with 100 Ah capacity. This 12-volt battery is maintenance-free and has a long service life, making it a reliable choice for fishers who spend a lot of time on the water. It also features a rugged, military-grade construction that can withstand harsh conditions and is resistant to vibration and shock.

3. Battle Born LiFePO4 Deep Cycle Battery

Battle Born LiFePO4 Deep Cycle Battery is a lithium iron phosphate (LiFePO4) battery, which is a lightweight and long-lasting alternative to traditional lead-acid batteries. This 12-volt battery has a 100 Ah rating, and its unique chemistry allows it to have a longer lifecycle and better performance. The downside is that LiFePO4 batteries tend to be more expensive, but the investment is often worth it for the exceptional performance and longevity they provide.

4. Universal Power Group (UPG) UB121000 Deep Cycle Battery

Universal Power Group (UPG) UB121000 Deep Cycle Battery is an affordable yet reliable choice for powering your trolling motor. This 12-volt AGM battery boasts a 100 Ah capacity and is maintenance-free. It features a spill-proof construction, which prevents any damage from acid leaks. Although it might not last as long as premium models, this battery is perfect for those looking for a budget-friendly option.

Factors to Consider When Choosing a Deep Cycle Battery

When selecting the best deep cycle battery for your trolling motor, consider the following factors:

  1. Capacity (Ah Rating): The higher the capacity, the longer your trolling motor will run before needing a recharge. Consider your typical fishing sessions and choose a battery with enough capacity to match your needs.
  2. Voltage: Ensure that the battery's voltage matches your trolling motor specifications (usually 12, 24, or 36 volts). Mismatched voltage can lead to poor performance or even damage to your motor.
  3. Size and Weight: Make sure the battery will fit into your boat's designated space and that you can handle its weight. Remember, large capacity batteries tend to weigh more.
  4. Type of Battery Technology: Lead-acid batteries like AGM (Absorbent Glass Mat) and Gel types offer good performance and are generally more affordable, while advanced lithium-based batteries (such as LiFePO4) are lighter, more efficient, and have a longer lifespan but come at a higher cost.


When it comes to finding the best deep cycle battery for trolling motors, it's crucial to balance capacity, durability, and affordability. By considering the factors mentioned above, and based on our top four recommendations, you can confidently power your trolling motor with the best battery for your angling adventures. Happy fishing!

Best Battery for a Trolling Motor

Q: What is the best battery for a trolling motor?

A: Lithium Iron Phosphate batteries, also referred to as LiFePO4 batteries or lithium marine batteries, boast the longest battery lifespan of any marine or deep-cycle battery. They are the best battery for a trolling motor any boatsman, yachtsman, or angler could want.

Q: Are there other good batteries for trolling motors besides LiFePO4?

A: Yes, other good batteries for trolling motors include AGM (Absorbent Glass Mat) and flooded lead-acid batteries. While both options are typically more affordable than lithium marine batteries, they usually provide a shorter lifespan and require more maintenance.

Q: What factors should I consider when choosing a trolling motor battery?

A: When choosing a trolling motor battery, consider factors such as weight, battery capacity (measured in amp-hours), discharge rate, size, and battery lifespan. It's essential to select a battery that can efficiently provide enough power for your trolling motor throughout your trip while still fitting comfortably in your boat's available space.

Q: How can I determine the right battery capacity for my trolling motor?

A: To determine the right battery capacity for your trolling motor, first find out the total power usage of your motor in watts. Then, divide that number by 12 and multiply the result by the number of hours you plan to use your motor per day. This equation gives you the minimum amp-hours capacity your trolling motor battery should provide. We recommend adding a 20% safety margin to this number.

For example, if your trolling motor uses 600 watts, the equation is: (600 ÷ 12) × Hours of use (let's say 8 hours) = 400 amp-hours. Then add a 20% safety margin: 400 + 80 = 480 amp-hours. In this case, you should look for a battery with a capacity of at least 480 amp-hours.

Q: How do I maintain my trolling motor battery for a longer lifespan?

A: Proper maintenance of your trolling motor battery helps to increase its lifespan. Here are a few tips to keep your battery in excellent condition:

  1. Always use a proper charger designed specifically for your battery type (LiFePO4, AGM, or lead-acid).
  2. Charge your battery after each use to prevent deep discharges that can harm the battery's life.
  3. Store the battery in a cool, dry place when not in use.
  4. Avoid overcharging and over-discharging the battery.
  5. Check the battery terminals regularly for signs of corrosion and clean them if needed.
  6. Periodically inspect the battery for any physical damage, swelling, or leakage.
  7. For AGM and lead-acid batteries, always keep them upright to prevent acid leakage.

By following these tips, you can ensure your trolling motor battery remains reliable and efficient for many boating adventures to come.

Additional Questions

What is the best battery to use for a Minn Kota trolling motor?

When thinking about the right power source for your Minn Kota trolling motor, you’d want something that matches strength with stamina. This is why it’s recommended to go for a 12-volt deep cycle marine battery. More particularly, ones with an amp hour rating of at least 110, typically a group 27 size battery. But let’s dive deeper, what does all this technical jargon mean for you as a boater?

A higher amp-hour rating directly translates into more run time for your trolling motor. This means that you spend less time worrying about your battery running out and more time exploring and fishing. I remember one occasion when I was out fishing with a friend. We lost track of time and, unfortunately, the battery running our trolling motor gave out. It was a tough row back to shore, I can tell you that. Since that day, I've always valued a battery with a high amp-hour rating. For me, it's the peace of mind I need when I'm out at sea or lakeside.

What battery lasts the longest for a trolling motor?

Looking for a long-lasting battery for your trolling motor? Say no more. You should definitely consider Lithium Iron Phosphate batteries. Also known as LiFePO4 batteries or lithium marine batteries, these powerhouses will provide you with the longest battery lifespan.

These are not just words. Over the years, I have had the privilege of working with different types of batteries, but none have impressed me as much as the LiFePO4 batteries. Among all marine or deep-cycle batteries, LiFePO4 batteries hold the record for the longest lifespan. This makes them an ideal choice for any boater, yachtsman, or angler. Trust me, it's a game changer when you're out on the water and the last thing you want to worry about is your battery.

What is the best type of battery for an electric trolling motor?

A 12-volt deep cycle marine battery with at least 110 amp hour rating is the best choice for an electric trolling motor. Often, these come in Group 27 sizes or larger. The reason isn’t far-fetched. Such batteries come with a high amp-hour rating which equates to longer run times for the trolling motor.

Honestly, there's nothing more liberating than not having to worry about your battery when you're out fishing or simply cruising. On more occasions than I can count, having a reliable and durable battery has saved me from the headache of a shortened trip or frantic calls for help. So, remember, the higher the amp-hour rating, the more adventurous your boating experience should be.

Is AGM battery better for a trolling motor?

When it comes to powering trolling motors, AGM batteries are an excellent choice. Their resistance to damage, especially from vibration, is just unbeatable. You don’t have to take my word for it, take a moment to consider this.

Think about the many times your boat has had to bounce off waves on the water. Such conditions can easily damage a battery, derailing your adventure. I recall this one time when I was battling some quite rough waters on a fishing trip. My boat was bouncing around so much that I was sure something would break. Thankfully, I had an AGM battery installed. It withstood the ordeal and kept the trolling motor going all the way back to shore. It's not just their durability that impresses, but also the resilience of AGM batteries under tough conditions that really sets them apart.

Recent Posts