What is Lithium Trolling Motor Battery and How to Choose

Lithium trolling motor batteries have revolutionized the boating industry with their superior performance and advanced technology. In this article, we will delve into the benefits of lithium batteries over traditional lead-acid batteries and provide you with essential information to help you make an optimal selection.

Understanding about Lithium Trolling Motor Battery

Lithium trolling motor batteries are rechargeable deep cycle batteries consisting of lithium iron phosphate (LiFePO4) chemistry. They are specifically designed to deliver a slow and steady power supply for trolling motors. Most lithium trolling motor batteries operate at 12 volts, although there are also options available in 24 volts and 36 volts.

Suggest reading: Trolling Motor Batteries System: 12V, 24V VS 36V

 

What Kind Of Battery Do I Need For A Trolling Motor

Trolling motors typically function on 12, 24, or 36 volts, depending on the model in question.

For a 12-volt trolling motor, one could employ either a singular 12-volt battery or multiple 12-volt batteries connected in parallel to extend the duration of operation.

In the case of a 24-volt motor, either a single 24-volt battery or a series connection of two 12-volt batteries could be utilized. Finally, for a 36-volt trolling motor, the standard configuration involves linking three 12-volt batteries in series.

While most trolling motors are compatible with various 12-volt battery types such as flooded lead acid battery, AGM, gel cell deep-cycle marine batteries, and even lithium batteries, it is worth noting that lithium batteries confer significant advantages over other 12V battery variants, as we shall soon explore.

Are Lithium Trolling Motor Batteries Worth it?

Upgrading your trolling motor battery to LiFePO4 lithium battery has many benefits such as extended run time, lighter, longer lifespan,  maintenance free and so on.

Longer-Lasting Power and Increased Performance

LiFePO4 batteries are known for their impressive cycle life, allowing them to endure a significantly higher number of charge and discharge cycles compared to traditional batteries. The life cycles of a lead-acid battery can only be 300-500 (2-3 years lifespan) while LiTime LiFePO4 lithium batteries have the life cycle up to 4000-15000 (up to 10 years lifespan).

This characteristic contributes to their prolonged operational lifespan, ensuring that they can reliably power a trolling motor for extended periods without the need for frequent replacements.

Furthermore, LiFePO4 batteries exhibit exceptional energy density, meaning they can store a greater amount of energy in a compact size. This high energy density enables the battery to provide consistent and sustained power output to the trolling motor, resulting in improved performance and efficiency.

Higher Energy Density and Lightweight Design

LiFePO4 batteries have a significantly higher energy density compared to traditional AGM batteries. 

This enhanced energy density allows for a more compact and lightweight battery, which in turn reduces the overall weight of the trolling motor system. A LiTime 12V 100Ah TM weights only 22lbs, while a traditional lead acid battery weights up to 70 lbs. What' more, it has low-temperature charging protection to protect the battery in cold winter day. 

The lightweight design of LiFePO4 batteries has numerous benefits. Firstly, it helps to improve the efficiency of the trolling motor by reducing the overall load it needs to propel. This translates into better speed and longer operating times on the water.

Secondly, the lightweight nature of LiFePO4 batteries makes them more portable and easier to handle. Anglers and boating enthusiasts can easily carry and transport these batteries without being burdened by their weight. This is especially useful for those who frequently need to move their trolling motor systems between boats or storage.

Furthermore, the lightweight design of LiFePO4 batteries contributes to their overall durability and lifespan. The reduced weight puts less strain on the battery and its components, resulting in less wear and tear over time.

Minimal Maintenance Requirements Compared to Other Battery Types

LiFePO4 batteries are known for their minimal maintenance requirements compared to other battery types, particularly in the context of a trolling motor. This is attributed to several factors.

Firstly, LiFePO4 batteries have a very low self-discharge rate, only 1%-3% per month, while lead acid battery’s self-discharge rate can up to 5% per month. Self-discharge rate means batteries retain their charge for extended periods when not in use. This eliminates the need for frequent recharging and ensures the battery remains ready for immediate use.

Data source: LiTime laboratory

Secondly, LiFePO4 batteries do not require watering or fluid level checks like lead-acid batteries. Lead-acid batteries must be periodically inspected and topped up with distilled water to maintain proper electrolyte levels, whereas LiFePO4 batteries are sealed and maintenance-free in that regard. Learn more on How to Properly Storing Your LiFePO4 Battery.

Additionally, LiFePO4 batteries are highly durable and have a longer lifespan compared to other battery types used for trolling motors. They are more resistant to deep cycling, which is commonly experienced in marine applications, and can withstand repeated charge and discharge cycles without significant capacity loss.

Built-IN Battery Management System

Lead-acid batteries are susceptible to internal shorts, temperature-related damage, and, as previously mentioned, adverse effects resulting from improper charging. However, it is important to note that lead-acid batteries lack a battery management system to monitor functionality and provide an additional layer of protection.

LiTime trolling motor sereis lithium battereis are equuiped with upgraded BMS which is spcially designed for marine applications with moisure-proof, dust-proof and salt-spray-resistant function. Say goodbye to damaged BMS by the salty water.

LiTime 12V 100Ah Trolling Motor Lithium Battery

Enhanced Power Charging and Discharging Efficiency

When you combine the significant reduction in weight and additional run time that lithium batteries offer, you ultimately achieve a more efficient system. If you compare the runtime per pound of battery, you will experience approximately four times the efficiency.

It takes about 5 hours to fully charge the lithium iron phosphate battery in the case of no power, which is significantly faster than lead-acid batteries.

5 Year Warranty

While traditional lead acid battery can only provide 1-2 years warranty, you can enjoy 5 years warranty in LiTime, along with within 24 hours reply to help you solve your problems by contacting service@litime.com.

Factors to Consider When Selecting Lithium Trolling Motor Batteries

Factor 1: Battery Size

The dimensions of your trolling motor and its compatibility with the accompanying boat are crucial factors to consider. When searching for lithium batteries for your trolling motor, it is important to take into account the amperage and voltage requirements. The battery capacity should align with the size of the trolling motor, with larger motors necessitating higher capacities. For optimum performance, it is advisable to consult the manual or seek guidance from the manufacturer.

Ideally, they will be able to provide insights on the most appropriate battery size.  Learn more on Selecting The Ideal Battery Size For Your Trolling Motor

Factor 2: The Number of Batteries

Depending on the specifications of your trolling motor and any additional devices you wish to power (such as audio systems, lights, GPS, etc.), you might require multiple trolling motor batteries. Most avid bass fishermen typically opt for our 12V 50Ah or 12V 100Ah battery as a starting point. However, if you intend to power more than just your trolling motor, a combination of lithium marine batteries by connecting them in series or parallel would likely be necessary. Additionally, if you desire extended run time, it would be advantageous to consider increasing the battery capacity.

For those utilizing trolling motors on kayaks, a smaller-sized lithium battery like LiTime 12V 50Ah batteries should suffice. It's worth noting that in situations like this, where weight is a crucial factor, opting for the lightest battery weight possible is essential, making lithium batteries the ideal choice due to their inherent advantages.

Factor 3: How Long Do You Want To Stay In The Water

Consider the desired duration of equipment operation. Are you heavily reliant on your trolling motor or do you only use it sporadically? Do you prefer exhilaratingly zipping across the lake at maximum velocity or indulging in a more leisurely pace? These aspects should be carefully pondered when selecting a lithium battery for your trolling motor.

Comprehending the amperage hour rating and motor amperage draw encompasses a multitude of variables. As mentioned earlier, the battery's power duration will be influenced by factors such as operating the trolling motor at medium speed as opposed to wide-open throttle. While most trolling motor manufacturers specify the maximum amp draw at top speed, this only presents a partial comprehension of the entire situation. Thus, some estimation may be necessary as, most of the time, you are unlikely to draw more than 50% thrust.

To illustrate, suppose your trolling motor has a maximum amp draw of 30, and you possess a 12V 100Ah battery. In this case, you can expect a runtime of approximately 3 hours. Here is a simplified equation to consider:

Amp Hours of your battery
————————————— = hours of runtime
Amp draw of your trolling motor

However, it is crucial to bear in mind that you most likely do not operate your trolling motor at its maximum draw, which means your actual runtime may be longer. Additionally, external factors such as weather conditions should also be taken into account. If your trolling motor is combatting strong winds and waves, it will consume more energy, resulting in reduced runtime.

Do Lithium Trolling Batteries Need a Special Charger?

lithium trolling batteries typically require a charger specifically designed for lithium batteries. Lithium batteries have different charging requirements compared to traditional lead-acid batteries, so using a charger designed for lead-acid batteries may not provide the correct charging profile for lithium batteries. Related reading:Can I Charge LiFePO4 Battery with A Normal Charger?

Lithium VS Lead-Acid Battery Charging Mode

Lithium batteries often require chargers that can deliver a specific voltage and current profile to ensure safe and efficient charging. Additionally, many lithium battery chargers include features such as balancing to ensure that each cell within the battery pack is charged evenly, which is important for the longevity and safety of the battery.

Using an onboard lithium battery charger for a lithium battery is advisable not only for safety reasons but also because it can expedite the charging process. Additionlly, LiTime provides IP67 waterproof smart lithium battery charger for 12 volt lithium batteries, which is perfect for marine applications.

Bonus Tip: Things You Should Care When Trolling in the Lake

The Sun Light

Fishermen often immerse themselves in the excitement and joy that fishing brings. However, it is crucial to be aware of the dangers posed by the harmful ultraviolet (UV) rays from the sun. Understanding the importance of protecting oneself from sun exposure is essential, especially for avid fishermen. Your skin is the largest organ in your body, and if it is damaged beyond repair, it cannot be transplanted. Therefore, preventing harmful sun rays should be a top priority for every fisherman.

Weather Conditions

It is important to keep a close eye on the weather conditions before heading out to troll in the lake. Sudden changes in weather can be dangerous and potentially put you at risk. Be aware of the forecast, look out for any signs of inclement weather, and consider rescheduling your trip if necessary.

Safety Equipment

Always ensure that you have the necessary safety equipment with you while trolling in the lake. This includes life jackets, first aid kits, a whistle or signaling device, and a fire extinguisher if you're using a motorized boat. These items can be lifesavers in case of emergencies.

Fishing Regulations

Every lake has its own set of fishing regulations and it is important to familiarize yourself with them. Be aware of catch limits, size restrictions, and any specific rules or restrictions in the area. Fishing responsibly and following these regulations helps preserve the ecosystem and ensures the sustainability of fish populations.

Wildlife and Environment

Respect the wildlife and environment around you while trolling in the lake. Avoid disturbing nesting birds or other animals, and dispose of any trash properly. Leave the area as you found it, or even better, cleaner than before. Being a responsible angler means considering the impact of your actions on the ecosystem.

Fishing Etiquette

Be aware of other fishermen and boaters sharing the lake. Give them enough space and respect their fishing spots. Avoid making excessive noise or causing disruptions that could potentially ruin someone else's fishing experience. Practicing good fishing etiquette helps create a positive and enjoyable atmosphere for everyone on the lake.

Navigation and Safety Hazards

Familiarize yourself with the lake's navigation and be cautious of any potential safety hazards. Know the designated boating lanes, be mindful of shallow areas, rocks, or submerged structures that can damage your boat, and always keep an eye out for other boats or objects in the water.

Remember, trolling in the lake should be a fun and enjoyable experience for everyone, so taking these extra precautions and caring about these additional things can help ensure a safe and memorable fishing trip.

Should I Buy Lithium Marine Batteries for my Fishing Boat?

Determining the right batteries for your trolling motor and electronics depends on your budget and usage patterns. Although the initial cost of Lithium batteries is high, their long-term durability may make them a more cost-effective option if you plan to use your trolling set-up for an extended period. If you spend long hours on the water or need power during multi-day fishing trips, lithium batteries could be an excellent choice due to their extended run time.

Additionally, if you're looking to reduce weight in your boat to improve performance, lithium batteries are a great way to shed excess pounds compared to lead batteries. If you decide to invest in lithium batteries, you can be assured that your LiTime trolling motor lithium battery and charger will facilitate a smooth transition, offering out-of-the-box compatibility.