Lithium vs. Lead Acid? How to Choose the Battery for a Kayak Trolling Motor?
When it comes to kayak fishing, a reliable trolling motor battery is essential for an enjoyable and successful experience on the water. The two most common types of batteries used for kayak trolling motors are lithium and lead-acid batteries.
In this article, we compare the features and benefits of lithium and lead-acid batteries and provide you with valuable insights to help you make an informed decision when choosing the ideal battery for your kayak trolling motor.
What is a kayak trolling motor?
A kayak trolling motor is a device that can be attached to a kayak to provide propulsion and make it easier to maneuver on the water. It consists of an electric motor, a propeller, and a steering system. Unlike traditional paddle-powered kayaks, a trolling motor allows kayakers to navigate more easily, travel greater distances, and save energy on long fishing trips.
The kayak trolling motor is usually mounted at the stern (back) or bow (front) of the kayak, depending on its design and configuration. To ensure stability and safety, it can be attached using various mounting systems such as brackets or clamps.
Trolling motors for kayaks are usually electric and run on batteries, making them quiet, environmentally friendly, and suitable for fishing in calm and freshwater environments. The electric motor can be controlled by a tiller or remote control, allowing the kayaker to adjust the speed and direction of the motor as needed.
Kayak trolling motors come in a variety of sizes and power levels to accommodate different kayak sizes and weight capacities. It is important to choose a trolling motor and battery combination that provides sufficient power and run time for your specific kayaking and usage needs.
research into lead-acid batteries
Lead-acid batteries have traditionally been the choice for kayak trolling motors and are known for their durability and reliability. They are relatively affordable, making them a popular option for anglers on a budget. Lead-acid batteries come in two varieties: sealed lead-acid (SLA) and flooded lead-acid (FLA). SLA batteries are maintenance-free and spill-proof, while FLA batteries require occasional maintenance to check the water levels of the cells. Compared to lithium batteries, lead-acid batteries are bulkier and heavier. They also have a shorter lifespan and take longer to charge.
Benefits of Lead-Acid Batteries for Kayak Trolling Motors
Affordability: Lead-acid batteries are a cost-effective option, typically costing less than $200 to replace. The low initial cost makes them an attractive choice for anglers on a budget.
Sealed options: Sealed lead-acid batteries, such as Absorbent Glass Mat (AGM) batteries, eliminate the risk of spills and environmental damage associated with unsealed versions, providing added safety and convenience.
Disadvantages of Lead-Acid Batteries for Kayak Trolling Motors
High weight: Lead-acid batteries are significantly heavier than lithium-ion batteries.The extra weight can cause the kayak to sit lower in the water, affecting maneuverability and overall performance.
Limited discharge: To maintain energy efficiency and prevent damage, lead-acid batteries should not be discharged below 50% of their capacity. Discharging below this limit not only reduces their lifespan, but also causes the battery to discharge more quickly.
Slow loading: Charging lead-acid batteries is a slower process compared to lithium-ion batteries. They require multiple charging cycles, including a trickle charge phase that takes longer and uses more power. This can be a disadvantage for anglers who prefer fast charging times.
Environmental aspects: It is important to use only sealed lead-acid batteries for kayak trolling motors to avoid acid leakage and environmental damage. Unsealed versions require careful handling and maintenance to avoid potential damage.
Understanding of lithium batteries
Lithium batteries have become increasingly popular in recent years due to their numerous benefits. These batteries are lightweight, compact and offer high energy density, meaning they can deliver more power while weighing significantly less than lead-acid batteries. Lithium batteries also have a longer lifespan, meaning you can use them for several seasons without having to replace them. They charge quickly and hold their charge for longer periods of time, which is especially useful for anglers who require longer sessions on the water.
Benefits of Lithium Ion Batteries for Kayak Trolling Motor
Lightweight: Lithium-ion batteries are well suited for kayaks because of their light weight. They provide a more balanced ride with reduced drag, improving the overall performance of the kayak.
Fast charging: Lithium-ion batteries can be fully charged in just a few hours, saving time and allowing you to get back on the water quickly. Their fast-charging capabilities outperform lead-acid batteries, which require longer charging times.
deep discharge: Unlike lead-acid batteries, lithium-ion batteries can be fully discharged without affecting their lifespan. They automatically shut off at 100% discharge, protecting the battery from damage.
Constant performance: Lithium-ion batteries provide consistent power throughout the charge cycle, providing a more consistent current draw. This allows for better battery life estimation and ensures reliable power delivery from your trolling motor.
Long service life: Lithium-ion batteries have an impressive lifespan, often exceeding a decade with proper care. This longevity makes them a durable and reliable choice for kayak anglers and reduces the need for frequent battery replacement.
Cost savings:Although lithium-ion batteries have a higher initial cost compared to lead-acid batteries, they offer significant cost savings in the long run. Their longer lifespan allows you to avoid the cost of purchasing multiple lead-acid batteries over the same period.
Disadvantages of lithium batteries
The main disadvantage of lithium-ion batteries is their higher initial cost compared to lead-acid batteries. However, Timeusb offers low-cost lithium batteries that make the upgrade more affordable.
Important Considerations When Choosing a Kayak Trolling Motor Battery
Weight: Choose a lightweight battery to minimize the drag of your kayak, allowing for better maneuverability and greater efficiency.
Ampere-hour rating: Consider the amp-hour (Ah) rating of the battery to ensure it can provide enough power for your trolling motor. Higher ratings may be required for longer trips or demanding conditions.
Size and portability: Choose a battery that is easy to carry and fits well in your kayak. Bulky batteries can affect balance and make handling difficult.
Life: Look for a battery with a long lifespan to maximize your investment. Consider the number of full discharge cycles it can withstand and any warranties available for added peace of mind.
Timeusb batteries For example, they offer exceptional durability with an average lifespan of 4,000 full discharge cycles and a 5-year warranty.
By carefully considering these factors, you can make an informed decision and select the ideal kayak trolling motor battery that meets your specific needs. This will ensure reliable performance, enhance your kayaking experience, and allow for maximum fun on the water.
How long can a kayak trolling motor run on a 100Ah lithium battery?
The run time of a lithium battery for a kayak trolling motor is affected by factors such as the power draw of the motor and the operating speed. To estimate run time, you can calculate the amp draw of your trolling motor and divide the capacity of the battery by that value.
For example, let's say your trolling motor draws 25 amps at top speed. To estimate run time, divide the battery capacity by the amp draw:
100Ah / 25A = 4 hours
In this case, using a 100Ah lithium battery with a trolling motor drawing 25 amps at top speed would give a run time of approximately 4 hours. Note that this is only an estimate, as actual run time may be affected by environmental conditions and usage patterns.
Are lithium-ion batteries for kayak trolling motors worth the investment?
Given the information provided, opting for a lithium-ion battery for your kayak trolling motor is a worthwhile decision. While the upfront cost may be higher, the long-term benefits make it an excellent investment.
Is it necessary to charge my batteries after each use?
In general, it is recommended to charge the batteries after each use to charge, even if you use lithium batteries, which are less susceptible to damage from partial discharge than lead-acid batteries.
By regularly charging your lithium batteries, you will optimize their capacity and ensure that they are optimally prepared for maximum runtime on your next water trip. This practice will help maintain their overall performance and reliability and ensure that you have a reliable power source for your future boating adventures.
