Navigating the open waters or stealthily creeping through the creeks, the last thing an angler wants is a trolling motor powered by a mismatched battery!
Understanding what size lithium battery for trolling motor can mean the difference between a bountiful day on the water longer life, smoother operation, and reduced efficiency and motor damage.
In this guide, we’ll dive deep into the determining process for the right battery size, and explore the various types of lithium batteries available. Keep reading to power up your knowledge!
What size lithium battery for trolling motor?
For a trolling motor, you’ll require a 12V battery with at least 100Ah capacity. It ensures optimal performance and sufficient power for prolonged use especially in fishing activities. However, the ideal size lithium battery is determined by the motor’s power and usage needs.
Trolling Motor Battery Sizes Chart:
|Trolling Motor Power (in Watts)||Minimum Battery Voltage (V)||Recommended Battery Capacity (Ah)||Suitable For|
|180||12||50||Small boats, kayaks|
|360||12||100||Medium-sized boats, freshwater use|
|720||24||200||Larger boats, saltwater use|
|1440||36||300||Heavy-duty marine applications|
Different Types of Lithium Batteries Suitable for Trolling Motors
LiFePO4 batteries, also known as Lithium Iron Phosphate batteries, are a popular choice for trolling motors. They are known for their long lifespan and stability.
What makes them stand out is their ability to handle high temperatures, making them very safe. Imagine using your trolling motor on a hot summer day; LiFePO4 batteries won’t let you down!
They also have a slow discharge rate, which means your trolling motor can run longer before the battery needs recharging.
Next up are Lithium-Ion batteries. These batteries are lightweight and have a high energy density. In simple terms, they can store a lot of energy relative to their size.
This makes them an excellent choice for trolling motors, especially if you’re planning a long fishing trip. They can power your trolling motor for hours without adding much weight to your boat.
However, they do require proper handling and storage to ensure safety and longevity.
Lithium Polymer Batteries
Last but not least, we have Lithium Polymer batteries. These batteries are very light and flexible. The cool thing about them is that they can be made in any shape.
This makes them perfect for compact trolling motors where space might be limited. They also offer a high discharge rate, meaning they can provide a lot of power quickly when your trolling motor needs it.
However, they do require careful handling as they can be more sensitive to overcharging or physical damage.
How to Determine the Right Battery Size for Trolling Motors
Finding the Right Voltage for Your Trolling Motor
Voltage is like the power behind your trolling motor. A higher voltage means more power and longer battery life. You need to decide which one is right for you. For smaller boats, a 12V battery is good.
It’s like having a smaller engine in a car. If you have a medium-sized boat, you might want a 24V battery. It’s like having a bigger engine for more power.
And, for very large boats, a 36V battery will do the job. It’s the biggest engine of them all!
Checking Battery Type and Amp-Hour Rating
Let’s talk about battery types and amp-hour ratings. It’s important to get the right one! There are different types of batteries, like deep cycle batteries.
They are good for long-term energy use. It’s like a camel storing water for a long trip. Then there’s the amp-hour rating.
It tells you how much energy the battery can store. So, a higher amp-hour rating means the battery will last longer. Make sure you pick a battery with the right amp-hour rating for your needs.
Calculating the Required Battery Capacity
Now, let’s learn how to calculate the required battery capacity. Start by finding out the total wattage of your trolling motor. It’s like knowing how many apples you have in a basket.
Then, divide the total wattage by the voltage of your battery. So, if you have a 12V battery, you divide the wattage by 12. This will give you the amps per hour you need.
It’s like knowing how many baskets you need for your apples. Make sure your battery has enough capacity to meet this requirement!
Considering the Weight of the Battery
Remember, batteries can be heavy. You don’t want a battery that’s too heavy for your boat. It’s like putting too many books in your backpack.
You’ll feel it! Weigh your boat and see how much weight it can carry. Check the weight of the battery before buying it.
Make sure it’s not too heavy for your boat. A lighter battery is often better. But don’t forget, it also needs to have enough power for your needs!
Checking the Battery’s Reserve Capacity
Don’t forget about the battery’s reserve capacity! It’s like having extra cookies in your lunchbox, just in case. The reserve capacity tells you how long the battery will last if your motor runs at 25 watts.
It’s important because you don’t want to be stuck in the middle of the lake with a dead battery! Look for a battery with a high reserve capacity. It will give you peace of mind knowing you have extra power if you need it.
Understanding the Price and Warranty
Lastly, think about the price and warranty. It’s like buying a new toy. You want to know it’s worth the money and that it has a guarantee. Compare prices from different sellers. Make sure you’re getting a good deal.
Don’t forget to check the warranty. It’s like a promise that the battery will work well. If it doesn’t, the company will help you. Choose a battery with a good warranty to avoid any trouble later on!
Factors Influencing Lithium Battery Size Selection for Trolling Motors
Trolling Motor Power
The power of your trolling motor directly influences the size of the battery you need. For instance, if you have a powerful motor that uses 60 amps of current, you’ll need a larger battery than a motor that only uses 20 amps.
Battery capacity, measured in Ampere-hours (Ah), is like the fuel tank of your battery. The larger the capacity, the longer your trolling motor can run.
For example, a 100 Ah battery can theoretically deliver 1 amp for 100 hours.
The voltage of your battery is like the horsepower of your car. Higher voltages deliver more power, but they also drain faster.
For example, a 24-volt battery can deliver more power than a 12-volt battery but will drain twice as fast if the same amount of power is used.
How long you plan to use your trolling motor also affects your battery size. If you’re planning a full day of fishing, you’ll need a larger battery compared to someone who only goes out for a few hours.
Environmental conditions like cold temperatures and rough waters can make your motor work harder and drain your battery faster. If you often fish in these conditions, consider getting a larger battery.
The weight of your battery can affect the performance and handling of your boat. A heavier battery might provide more power, but it will also weigh your boat down. It’s important to find a balance that works for your specific boat and trolling motor.
While lithium batteries can be more expensive upfront, they can save you money in the long run due to their longer lifespan and better performance.
It’s important to consider both the initial cost and the long-term value when choosing a battery.
Warranty and Manufacturer Support
A good warranty and strong manufacturer support can give you peace of mind when investing in a lithium battery. They ensure that any issues are quickly resolved and that you get the most out of your investment.
Safety and Compliance
Safety should always be a top priority when choosing a lithium battery. Always choose batteries that meet safety and regulatory standards to ensure safe operation and protect the environment.
Can I use a Lithium Polymer battery for my small trolling motor?
Yes, Lithium Polymer batteries are suitable due to their lightweight and flexible nature, especially for compact trolling motors where space is limited.
Is the amp-hour rating indicative of how long the battery will last?
Yes, the amp-hour (Ah) rating indicates how much energy the battery can store, affecting how long it will power your trolling motor.
Are LiFePO4 batteries safe for use in high temperatures?
Yes, LiFePO4 batteries are known for their ability to handle high temperatures and are considered very safe.
Do higher-voltage batteries drain faster than lower-voltage ones?
Not necessarily; higher voltage batteries can deliver more power, but whether they drain faster depends on the power usage of the trolling motor.
Does the weight of the battery significantly impact the boat’s performance?
Yes, the weight of the battery can impact the boat’s performance and handling, especially if it’s too heavy for the boat.
Selecting the right size lithium battery is crucial for getting the most out of your trolling motor.
By considering factors like power requirements, usage duration, environmental conditions, weight, budget, warranty, safety, and compliance, you can make an informed decision that will benefit you in the long run.