How to Choose the Best Fish Finder Battery for 2024

There’s no denying that modern fish finders have revolutionized the way we fish, providing valuable insights into the underwater world. But to keep these devices running efficiently, it’s crucial to choose the right battery that can deliver the power needed without weighing you down.

After all, a fish finder is only as good as its power source. So, how do you ensure you make the best choice for your needs? In this post, we’ll delve into the world of fish finder batteries, compare the different 12-volt battery options and discuss the key factors to consider when making your decision.

Get ready to become an informed angler, equipped with the knowledge to select the perfect fish finder battery that will keep you fishing longer and more efficiently, so you can focus on what truly matters: reeling in that trophy catch.

KEY TAKEAWAYS

• Fish finders are powered by either the boat’s electrical supply or external deep-cycle batteries, with lithium marine batteries offering greater advantages.

• When selecting a battery for a fish finder, consider voltage, amp-hour rating and other factors to choose the best fit. Our lithium batteries offer superior performance.

• Lithium batteries have extended lifespan and provide rapid charging and minimal maintenance requirements for an efficient fishing experience.

How are fish finders powered?

Fish finders draw their power from the boat’s electrical supply and battery setup, which is typically either a dual-purpose deep-cycle battery or a dedicated electronics battery. Dual-purpose batteries would be useful in most boats where you can power the engine (as a starter battery) as well as your electronics, which would include the fish finder.

However, larger boats might want multiple batteries for power sources to dedicate separately to starting, operating electronics and powering a trolling motor.

Additionally, if you are interested in using a kayak fish finder if you're a kayak fishing enthusiast, the other option is to have a dedicated external battery that powers your fish finder and perhaps even a small trolling motor.

The two most prevalent options for powering fish finders are 12V sealed lead acid (SLA), such as AGM (absorbed glass mat) and lithium batteries. Each type has its own set of advantages and disadvantages, which we will explore further in this post.

Lithium batteries offer consistent output even when depleted past 50%, unlike lead-acid batteries, which gives them an advantage over SLA batteries. Moreover, lithium batteries are lightweight and compact, making them ideal for smaller boats that need to maximize precious space and prevent excess weight from slowing the boat down or hindering navigation in shallow waters.

Do you need a separate battery for your fish finder

For those who own a boat without an electrical system, such as a small boat or kayak, a separate deep cycle battery is necessary to power their fish finder. Traditional lead acid batteries can be an option in this case.

However, lithium batteries, such as our ProConnect lithium batteries, provide numerous advantages for fish finders. They are lightweight, compact, able to discharge 100% of their power without impacting battery life and provide a steady current for electronics.

Whether you're building a robust lithium battery bank for your bass fishing boat where the batteries will be used for multiple purposes, or a simple kayak fish finder battery, saving the extra weight will be important.

And the only downside of lithium batteries is their higher cost. If you understand the value of lithium marine batteries, that you get twice the power and more power overall compared to a standard battery, then cost should not hinder your purchase decision.

Despite the higher initial cost, the benefits of lithium batteries make them a highly recommended choice for those needing a separate battery for their fish finder. Their lightweight design and superior performance can make a significant difference in your fishing experience, especially if you’re operating from a kayak or a smaller boat.

Understanding Fish Finder Batteries

Understanding the power requirements and lifespan of different fish finder batteries is key to making an informed decision about which battery suits your fish finder.

In the following sections, we will delve into these aspects and help you choose the perfect battery for your needs.

Power Requirements

Fish finder batteries typically offer a voltage of 12 volts and have a varying current draw ranging from 1 to 3 amps per hour. However, specific power requirements for fish finders can differ. This is minimal compared to the draw of other boat electronics.

And if you are selecting a lithium fish finder battery for that purpose only, you can have one battery that does not need to have a large number of amp hours.

Hence, selecting a battery that aligns with your device's correct voltage and amp-hour rating is critical for compatibility. Consider factors such as the battery’s construction, power, size and weight when choosing the most suitable fish finder battery for your needs.

Lithium batteries, like our 12V 12Ah or 12V 6Ah batteries, are becoming more prevalent in the fish finder market due to their superior performance compared to lead-acid batteries. They offer a lighter weight, increased power, and a longer lifespan, making them the ideal choice for powering fish finders and are an invaluable asset in your fishing gear.

Battery Lifespan

The estimated lifespan of a fish finder battery can vary depending on the type of battery, ranging from 2000 charge cycles up to 10 years. Lead-acid batteries typically have a lifespan of between 500 to 1,200 charge/discharge cycles, whereas lithium-ion batteries boast up to 5-10 times longer than lead-acid batteries.

Considering the battery’s lifespan is a crucial factor in your decision-making process since it can influence your fishing experience and satisfaction with your choice of a fish-finder battery. Our lithium batteries offer a longer lifespan and better performance than lead-acid batteries, making them an attractive option for many anglers.

Comparing Battery Types for Fish Finders

Having established a basic understanding of fish finder batteries, their power requirements, and their lifespan, it’s time to compare sealed lead acid and lithium batteries - the two most common types used in fish finders.

We will discuss the pros and cons of each type, helping you determine which battery is the best fit for your fish finder.

Sealed Lead Acid Batteries

A sealed lead acid battery (SLA battery) is a cost-effective and reliable option for fish finders. One reason they are often used in deep cycle or marine applications is due to their ability to function regardless of orientation. These batteries are sealed, making them leak-proof and able to withstand harsh environmental conditions such as water, vibration and temperature fluctuations - all of which are present on the water.

However, their weight and reduced lifespan compared to lithium batteries are notable drawbacks of traditional lead acid batteries. Lead-acid batteries typically have a life expectancy of 3-5 years with minimal maintenance. Keep in mind that discharging a lead-acid battery beyond 50% of its capacity can cause damage, potentially resulting in the battery becoming inoperable.

This is a big factor to consider because this may reduce your time on the water or require you to purchase more than one battery. Although sealed lead acid batteries are a viable option for fish finders, their heavier weight and shorter lifespan make them less attractive compared to lithium batteries.

Lithium Batteries

Lithium batteries offer several advantages over sealed lead acid batteries for fish finders. Some of these advantages include:

• Lightweight

• Compact

• Fast-charging

• Superior performance

• Extended lifespan

These qualities make lithium batteries a popular choice for anglers looking for a reliable and efficient power source for their fish finders.

Our lithium batteries have a lifespan of 10+ years, backed by our guarantee, which is significantly longer than their lead-acid counterparts. Additionally, lithium batteries can be discharged up to 100% without impacting battery life, providing greater flexibility and convenience for users.

While lithium batteries come at a higher price point, their numerous benefits make them a worthwhile investment for many anglers.

 

Related: Learn more about why you should consider switching to lithium batteries. 

 

Key Factors to Consider When Choosing a Fish Finder Battery

The information presented thus far should provide a clearer picture of the differences between lead-acid and lithium batteries for fish finders. Before locking in your choice, consider exploring key factors such as:

• Weight and portability

• Charging time

• Durability and resistance

• Reliability

• Maintenance requirements

Weight and Portability

A lightweight and portable battery is advantageous for fish finders, especially for those who fish from kayaks or small boats. The additional weight of a heavier battery can take up precious space and make it more difficult to maneuver the boat.

Lithium-ion batteries are the lightest option available, providing more energy while freeing up space on your boat. A kayak fish finder battery, such as a lithium-ion battery, is the perfect choice for this purpose.

For example, our Baja Series 12v 12Ah Lithium Battery has a battery weight of less than three pounds, making it an ideal choice for those who need a lightweight and portable fish finder battery. SLA battery options will weigh much more and offer fewer usable amp hours than our lithium battery.

Charging Time

Fast-charging batteries are essential for those who frequently use their fish finders, as they allow for rapid recharging and less downtime on the water. Lithium batteries charge more quickly than sealed lead acid batteries, providing enhanced convenience and efficiency for regular use.

For example, lithium-ion batteries like our 12V 100Ah ProConnect Series Battery can be charged to 100% within 2-3 hours, making them an attractive choice for anglers who require a quick and efficient charging solution.

This fast charging capability allows you to spend more time fishing and less time waiting for your battery to charge.

Durability and Resistance

Durability and resistance are crucial factors to consider when choosing a fish finder battery, as they directly impact the battery’s longevity and performance. A battery that can withstand water, vibration, and temperature fluctuations is essential for maintaining its structural integrity and ensuring optimal performance in a marine environment.

Both sealed lead acid and lithium batteries are designed to endure harsh marine conditions, with lithium batteries generally offering better resistance to extreme temperatures, vibrations, and water exposure.

Ensuring that your chosen battery can handle these conditions will provide you with peace of mind while out on the water.

Reliability

Reliability is critical when choosing a fish finder battery, as it ensures a steady and uninterrupted power supply for your device. Lithium batteries are generally more dependable than lead-acid batteries and can provide reliable power in a range of fishing conditions, especially our ProConnect Series designed specifically for marine applications.

Selecting a reliable battery means considering its overall performance, including:

• Weight

• Portability

• Lifespan

• Charging time

• Resistance to harsh marine conditions

A battery that meets all these criteria will provide you with the confidence and assurance you need while out on the water.

Maintenance-Free

Maintenance-free batteries, like lithium batteries, offer added convenience and cost-effectiveness in the long run. These batteries require no regular upkeep, such as checking water levels or cleaning terminals, allowing you to focus on your fishing experience rather than worrying about battery maintenance.

Lithium batteries offer several advantages over lead-acid batteries:

• Minimal maintenance requirements

• Less prone to issues that can reduce longevity

• Maintenance-free, providing a hassle-free fishing experience

• Cost savings on additional maintenance

Tips for Maintaining Your Fish Finder Battery

Knowing what to look for in a fish finder battery is just the first step. It’s equally important to understand how to maintain your battery to guarantee its optimal performance for an extended period.

The upcoming sections will provide tips on proper storage, regular charging, and how to monitor your battery’s performance.

Proper Storage

Storing your fish finder battery in a cool, dry place is crucial for prolonging its lifespan. Extreme temperatures can cause the battery to deteriorate, reducing its overall performance and life expectancy. Keep the battery away from direct sunlight and other sources of heat to maintain its optimal functioning.

Proper storage also means keeping the battery clean and free of dirt or debris, which can cause corrosion and negatively impact its performance. By ensuring your fish finder battery is stored in the right conditions, you can help extend its life and get the most out of your investment.

Regular Charging

Regularly charging your fish finder battery is essential for maintaining its optimal performance and preventing deep discharging, which can reduce its overall lifespan. It’s generally recommended to charge the battery completely before storing it and to charge it at least every three months, even when not being used for extended periods.

By keeping your fish finder battery charged and ready for use, you can ensure it remains in peak condition and avoid any unexpected power issues while out on the water. A well-maintained battery will provide you with consistent and reliable power, enhancing your overall fishing experience.

 

Related: Don't miss our post on how to properly charge lithium batteries.

 

Monitoring Battery Performance

Monitoring your fish finder battery’s performance is crucial for detecting any potential issues early and ensuring it’s functioning efficiently. Regularly checking the battery’s voltage, temperature, and charge level can provide valuable insights into its overall health and performance.

Should you observe any abnormal behavior or performance issues with your battery, addressing them promptly to prevent further damage is crucial. By keeping a close eye on your fish finder battery’s performance, you can enjoy a reliable and uninterrupted power supply, making your time on the water more enjoyable and productive.

Why Choose Lithium Fish Finder Batteries?

If you haven't figured it out by now, the best fish finder battery is very likely a lithium battery due to all of the reasons we've covered so far. A lithium battery offers numerous advantages over traditional lead-acid batteries, and are the preferred choice for many anglers.

Some of their advantages include:

• Lightweight design

• Extended lifespan

• Rapid charging

• Minimal maintenance requirements

These features set them apart from other battery options.

Although lithium batteries come at a higher price point, their long-lasting performance and convenience make them a worthwhile investment for those serious about their fishing endeavors. When it comes to choosing the best fish finder battery, consider the following benefits of lithium batteries:

• Long-lasting performance

• Lightweight and portable

• Quick charging time

• High energy density

• Low self-discharge rate

Lithium batteries are a top-notch option that can greatly enhance your overall fishing experience.

Summary

Choosing the right fish finder battery is a crucial decision that can significantly impact your overall fishing experience. By understanding the differences between lead-acid and lithium batteries, considering key factors such as weight, portability, charging time, durability, reliability, and maintenance, and following proper maintenance tips, you can make an informed decision that best suits your needs and enhances your time on the water.

Don’t let a subpar battery hold you back from reeling in the catch of a lifetime. Invest in a reliable, high-quality battery for your fish finder and enjoy the confidence and convenience of knowing you have the power to pursue your passion.

NEED MORE ASSISTANCE PLANNING YOUR POWER SETUP?  GIVE US A CALL AT 303-968-1366 AND OUR TEAM WILL HELP YOU GET STARTED!

 

Frequently Asked Questions

What type of battery is best for a fish finder?

Lithium Iron Phosphate (LiFePo4) batteries are the best option for fish finders, offering a longer-lasting and more powerful battery alternative. A lithium battery is also very safe, making it an ideal choice for any marine application.

How long will a 12-volt battery run a fish finder?

A 12V battery can provide lots of run time for the standard fish finder. Because most fish finders have a current draw of between 1-3 amp hours, even the smallest and lightest option for a battery will provide more power to keep you on the water for many hours.

For example, if your fish finder had a current draw at the maximum of 3 amps per hour, then our 12V 12Ah lithium battery would last for 4 hours (12 amp hours divided by 3 amps per hour). If you're device operated like most, with a current draw under 1 amp per hour, then you could expect to get 12 hours out of your battery.

Of course, this is based on a lithium battery. If you opted for a lead acid battery then you would have half of that run time before you risk damaging the battery.

Can you use a lithium battery in a fish finder?

Yes, you can use a lithium iron phosphate battery (LiFePO4) for your fish finder as they provide a longer-lasting and more powerful alternative to other batteries and are a very safe option. A lithium battery is designed to last longer than other types of batteries, and they are also more powerful.

They are also much safer than other types of batteries, as they are less likely to overheat or cause a fire. This makes them an ideal choice for powering a fish finder.

Do I need a separate battery for my fish finder if my boat doesn't have an electrical system?

Yes, a separate deep-cycle battery is needed to power your fish finder if your boat doesn't have an electrical system.

How can I prolong the lifespan of my fish finder battery?

To extend your fish finder battery's lifespan, store it in a cool and dry place, charge it regularly and monitor its performance. Regular charging and monitoring of your battery will help you to identify any issues before they become a problem. This will help to ensure that your battery is always in good condition and ready to use when you need it.