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Wie wählt man eine Kajak-Trollingmotor-Batterie? Lithium VS. Lead-Acid

How to Choose a Kayak Trolling Motor Battery? Lithium VS. Lead acid

, by Sally Zhuang, 11 min reading time

Choosing the right battery for your kayak trolling motor is crucial for optimal performance on the water. Two main options on the market are lithium batteries and lead-acid batteries. In this article, we'll go over the features and considerations of each type of battery so you can make an informed decision.

What is a kayak trolling motor?

A kayak trolling motor is an electric motor specifically designed to power kayaks. It is an alternative to traditional paddle propulsion and allows for easier and more efficient movement on the water. The trolling motor is mounted on the stern or bow of the kayak and is used to move the kayak forward or backward. It consists of a motor unit, a propeller, a controller and a power source, usually a battery.

The motor unit is typically compact and lightweight to ensure that it can be easily mounted to a kayak without adding excessive weight or disturbing the balance of the kayak. The propeller is responsible for generating thrust and moving the kayak through the water. The controls allow the kayaker to adjust the speed and direction of the motor. Many trolling motors offer variable speed settings and even built-in GPS navigation systems for added convenience.

The motor unit is typically compact and lightweight to ensure that it can be easily mounted to a kayak without adding excessive weight or disturbing the balance of the kayak. The propeller is responsible for generating thrust and moving the kayak through the water. The controls allow the kayaker to adjust the speed and direction of the motor. Many trolling motors offer variable speed settings and even built-in GPS navigation systems for added convenience.

Kayak trolling motors are particularly useful for anglers who want to navigate larger bodies of water, cover longer distances efficiently, or navigate against currents or wind. They offer a hands-free propulsion option so kayakers can concentrate on fishing or enjoying the scenery while the motor does the paddling.

Factors to Consider When Choosing a Kayak Trolling Motor Battery

When looking for the ideal kayak trolling motor battery, it is important to consider certain key factors that have a major impact on its quality. Let's look at these essential components:

Weight:

The weight of the battery plays an important role when you are out on the water. A heavier battery creates more drag on your kayak, making your engine have to work harder to maintain speed and efficiency.

Amp-hour value:

The number of ampere hours (Ah) indicates how long a battery can supply electricity. For example, a 100 amp-hour battery can provide 100 amps of power for one hour. However, the actual running time depends on the power consumption of your motor. Higher speeds and difficult conditions can result in higher power consumption, reducing the effective battery life.

In most cases, a 100 Ah battery is sufficient for standard trolling motor systems. However, if you plan longer trips, have a heavier kayak, or need to travel long distances against strong currents, a higher amp-hour battery may be required to meet the increased power requirements.

Size and portability:

In addition to the weight, the size and portability of the battery are also important. You should choose a battery that can be easily moved for charging or transport between kayaks. If the battery is too large and cumbersome, it can cause balance problems and difficulties on the water.

Maintenance requirements:

Battery maintenance can significantly affect battery life and your comfort. Some batteries, especially lead-acid batteries, require regular maintenance, such as: b by refilling electrolytes, corrosion cleaning, rust protection and charging control. Other batteries, on the other hand, require minimal or no maintenance, making them more user-friendly.

Life expectancy:

Buying a kayak trolling motor battery is a long-term investment, so it's important to consider its lifespan. Battery longevity depends on the type of battery used. While some batteries only last a year, others can last up to 10 years or more. It's important to look for a battery and choose one that is known for its durability and lifespan to ensure you get the most bang for your buck.

Our Power Queen batteries, for example, offer a remarkable service life, usually 4.000 complete discharge cycles. Additionally, they come with a 5-year warranty, ensuring reliable performance over an extended period of time, often equal to the lifespan of the vehicle they power.

By considering these important factors, you can make an informed decision and select the best kayak trolling motor battery that meets your specific needs to ensure reliable performance and maximize your enjoyment on the water.

Types of Kayak Trolling Motor Batteries: Lithium vs. Lead acid

Lead-acid and lithium batteries are the most popular trolling motor batteries we can find on the market. Let's have an overview of these 2 types of batteries and see why lithium battery is a better choice.

Sealed lead-acid batteries:

Sealed lead-acid batteries have long been the conventional choice for various applications, including vehicles. They are often used as starting batteries in cars and can be jump-started if necessary. Although they offer some advantages, their importance is decreasing in many applications. Here's a closer look at their advantages and disadvantages:

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Lead-acid batteries have been around for decades and remain an affordable option. Replacing a trolling lead-acid battery typically costs less than $200. Although they need to be replaced every few years, the low initial cost is attractive. Additionally, sealed lead-acid batteries do not pose the risk of leakage and environmental pollution as unsealed versions do.

Ndisadvantages

The disadvantage of lead-acid batteries is their relatively high weight. While it is still possible to use a heavy battery to power a trolling motor, the additional weight will cause the kayak to sit lower in the water. Additionally, lead-acid batteries should not be discharged beyond 50% to maintain efficiency and avoid damage. Discharging below this value will shorten the life of the battery and cause the battery to drain more quickly.

In addition, charging lead-acid batteries is a slower process as they require multiple charging cycles, including a trickle charge phase that lasts longer and uses more power. It is important to note that only sealed lead-acid batteries should be used for kayak trolling motors to avoid acid leakage and environmental damage.

Lithium batteries:

Lithium batteries represent the latest technology in battery types and are gradually replacing lead-acid batteries in various applications. These batteries cycle from anode to cathode and back during the charging process. Their unique charging cycle enables faster charging and consistent power delivery from full to empty.

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Lithium-ion batteries offer numerous advantages:

Light weight: Lithium-ion batteries are ideal for kayaks due to their low weight. They offer a more balanced ride with less air resistance. The efficiency of lithium-ion batteries ensures that their amp-hours last longer than those of lead-acid batteries.

Fast Charging: Lithium-ion batteries can be fully charged in just a few hours, which is a significant advantage over lead-acid batteries that require much longer charging times. They also do not require a trickle charge level, which ensures a more consistent and faster charging process.

Deep discharge: Unlike lead-acid batteries, lithium-ion batteries can be completely discharged without affecting their lifespan. They automatically shut off when they reach 100% discharge, so the battery is not damaged. While it's important to monitor battery levels to avoid being stuck with a dead battery, you don't have to worry about buying a new battery because of over-discharge.

Constant power: Lithium-ion batteries have a more constant current draw because the voltage does not drop as much. This allows for a better estimate of battery life as the current draw remains relatively constant. The engine's power output remains constant throughout the battery charging process, from full to empty.

Long lifespan: One of the biggest advantages of lithium-ion batteries is their long lifespan. They can last a decade or more and often come with a 5-year warranty. With proper care, it is not uncommon for lithium-ion batteries to last for more than 10 years.

Cost Savings: Although the initial cost of lithium-ion batteries is higher compared to lead-acid batteries, their long lifespan allows for significant cost savings over time. Instead of purchasing three or four lead-acid batteries in a similar period, a single lithium-ion battery can last for at least 10 years, saving money and time.

Ndisadvantages:

The biggest disadvantage of lithium-ion batteries is their higher purchase cost. They typically cost several hundred dollars, while the traditional lead-acid option stays under $200. However, Power Queen offers inexpensive lithium batteries, making battery upgrades easy.

Considering the longevity of lithium batteries and the savings that come from not having to replace the batteries as frequently, the higher initial cost is offset over the life of the battery.

What is the best kayak trolling motor battery?

When you choose a lithium battery for your kayak trolling motor, you will experience a more balanced ride with less resistance. The consistent power delivery throughout the battery charge ensures reliable performance from full to empty, without a significant drop in performance. In addition, lithium batteries offer the advantage of deep discharge, allowing you to use the battery's full capacity without affecting its lifespan. You no longer have to worry about closely monitoring battery levels or replacing the battery prematurely due to over-discharge.

Power Queen Low Temp LiFePO4 (12.8V 100Ah) Battery is an excellent option for a trolling motor. It is specifically designed to withstand the challenges of marine environments, making it a reliable choice for kayak enthusiasts.

With its moisture, dust and salt spray resistant construction, this battery offers exceptional protection from the elements. Whether you're navigating freshwater lakes or facing the harsh conditions of saltwater environments, you can count on this battery to deliver consistent, unwavering performance.

How long can a 100Ah lithium battery run a kayak trolling motor?

The running time of a 100Ah lithium battery for a kayak trolling motor depends on several factors, including the power consumption of the motor and the speed at which it is operated. To get an estimate of run time, you need to calculate the current draw of your trolling motor and divide the battery capacity by that current draw.

Let's assume your trolling motor draws 25 amps at maximum speed. In this scenario, we can divide the battery's capacity by the current draw to get an estimate:

100Ah / 25A = 4 hours

So if you use a 100Ah lithium battery with a trolling motor that draws 25 amps at maximum speed, you can expect about 4 hours of runtime. It is important to note that this is only an estimate and actual run time may vary depending on factors such as environmental conditions and engine usage patterns.

Frequently asked questions about trolling motor batteries

  1. Can I use a lead-acid starter battery with lithium trolling motor batteries?

Yes, you can use a lead-acid battery as a starter battery while using lithium batteries for your trolling motor. The two battery types can easily coexist in your system.

  1. Should I charge my batteries after each use?

Although lithium batteries are less prone to damage when partially discharged for a long period of time compared to lead-acid batteries, it is still recommended to recharge them after each use.

Regular Charging your lithium batteries helps optimize their capacity and ensures they are fully operational to provide maximum run time whenever you go out on the water. Regular charging can help maintain their performance and reliability for your next boating adventure.

Conclusion

Selecting the right battery for your kayak trolling motor is critical to optimal performance and a satisfying boating experience. Understanding the differences between lithium and lead-acid batteries and considering factors such as weight, capacity, voltage requirements, size and maintenance needs will help you make an informed decision. By choosing the battery that suits your specific needs, you can have long-lasting power on the water and make the most of your kayaking adventures.

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