Best Fish Finder Battery

Fish Finder Battery: Top 4 Picks with Buying Guide

If you want to make it as an angler, you need to have all the right equipment in place for everything to flow flawlessly. An example of such an item is the fish finder to ensure that you go about the business with minimal guesswork.

However, it needs a high-quality battery to power it up continuously for this device to be effective. This way, the entire system will continue running for a decent period without interruptions.

You are in luck as in this article; we shall look at some of the best fish finder batteries you can find and point out how we arrived at our decision of top units.

Top 4 High-Quality Fish Finder Batteries: Comparison Guide

We want you to use the shortest time to find the best fish finder battery. So, we have compiled the top units in this list to enable you find the perfect unit within no time.

Replacement Battery for Fish FindersPricing
ExpertPower 12V SLA BatteryView Latest Price
Chrome 12V Rechargeable Fish Finder BatteryView Latest Price
Nocqua Pro Power Battery KitView Latest Price
Aolithium LiFePO4 Lithium BatteryView Latest Price

1. ExpertPower 12V SLA Battery

Expert Power

The ExpertPower battery is an outstanding fish finder battery and we shall tell you why. First, it comes in a pack of two units, all of them well sealed. So, if you need a kayak fish finder battery, here is a good pick that will keep water at bay.

In addition to that, the batteries are pretty powerful with a voltage of 12V and 9 AMP each. As such, they can power your fish finder for up to between 3-12 hours uninterrupted.

What about the build? They have a rugged construction to ensure they remain in one piece for a decent period.


Easy installation


Wide temperature range


Poor packaging

2. Chrome 12V Rechargeable Fish Finder Battery

Chrome Battery for fishfinders

Here is another high-quality fish finder battery that you won’t be going wrong by investing in it. First, the unit uses Absorbed Glass Mat Technology to make it low maintenance, thereby giving you some peace of mind.

Additionally, the sealed ports are vital for boosting the battery’s longevity by keeping corrosion at bay. This will save you some money in the long run.

Another impressive bit about this 12V battery is its wide application. Besides the fish finder, you could also use it in other areas such as the alarm system.

You’ll also be pleased with the battery’s user-friendliness, whereby it arrives fully charged for you to get started instantly.



Easy maintenance



Short warranty period

3. Nocqua Pro Power Kit

Nocqua Battery Kit

Here, we have a complete kit to ensure that your fishing session goes on uninterrupted. This kit contains a 12V li-ion battery and a wall charger to help you out whenever the power runs out. It’s impressive how the kit has everything needed t to connect to your device.

For instance, how often do you find a kit with universal pigtail leads?

Next, to make it ideal for marine surroundings, the kit is entirely water-resistant, starting with the silicone-sealed battery to the watertight connection port. So, liquids seeping through cracks should be the least of your concerns.

Another vital feature is the charger’s design to automatically switch off in case of high temperatures and voltage, and short circuits. For this reason, incidences of damage and fires from the mentioned causes will be reduced.

Have we mentioned how compact and portable the unit is to give you an easy time moving around with it? No more bulky items to ruin your fishing trip.


Compact and lightweight




Poor customer support

4. Aolithium LiFePO4 Lithium Battery

Aolithium Battery for fish finder

If you are an environmentally-conscious individual, this unit by Aolithium would be your perfect match. It does not emit potentially toxic metals such as mercury or fumes and is therefore entirely safe for the environment.

Is quality control your deal breaker? That should be the least of your worries as this battery has all the necessary certifications including UKCA, UL, and CE. This should assure you of the top quality and safety that you’ll be getting from the product.

How about the deep cycle design that cuts down on the charging time and also makes the battery low maintenance?

Lastly, the unit is versatile enough for use in other areas such as camping and alarm systems.


Wide application

Low maintenance




How to Choose a Fish Finder Battery: Buying Guide

Now that you know some of the top fish finder battery brands in the market let’s discuss the factors you should focus on to ensure you make the right choice.

Here is a breakdown of the factors:

I) Battery Type

When looking for the best fish finders that can survive the unpredictable marine surroundings, there are two main types at your disposal. They are:

*Lithium Batteries (LiFePO4)

This type is highly rated mainly due to its lightweight and compact nature. As such, your device won’t be too bulky for comfort. In addition to that, this battery can discharge its power to its entirety without having an impact on its useful life.

However, these batteries tend to be the priciest in the market.

*Sealed Lead Acid Batteries

Also known as absorbed glass mat batteries, these units are fully sealed, making them the ultimate marine batteries. Their affordability and wide operating temperatures make these units to be very appealing to their users.

However, they have their downsides, including being bulky, making your device unnecessarily heavy. Further, discharging more than 80% of its power could damage its useful life.

II) Size/Weight

The weight is a vital factor to think about since you wouldn’t want your fish finder to make your vessel too heavy for you to paddle with ease. So, consider going for lithium-ion units, the lightest and smallest batteries around, rarely exceeding 6lbs.

In addition to that, since kayaks don’t have too much space to accommodate huge batteries, smaller units would be a reasonable choice.

III) Power

Next, it is vital for the battery to meet your fish finder’s power requirements. After all, there is nothing as frustrating as your device to dying down before you are done with your trip.

Assuming that your fish finder is powered by a 12V battery, it will consume around 1 amp per hour. Then, since your fishing trip is unlikely to exceed twelve hours, multiply this figure (time) by the device’s amps to know the capacity needed to power it.

With this simple calculation, you will know the kayak fish finder battery that will meet your fishing needs adequately.

IV) Charging Time

This factor mostly matters for an active angler since you wouldn’t want to waste valuable time waiting for your battery to attain full capacity. Here, lithium-ion batteries would be your best bet due to their fast recharge rate.

V) Watertight Storage

We all know the damage that occurs when electronics mix with water. So, you should do your best to ensure that you keep the battery in a waterproof case away from splashing water and other similar elements.

After finding the perfect box, store it in the vessel’s compartment, which is watertight, to maximize the distance from the water.

How to Hook to Trolling Motor Battery

If you want to get the best out of a trolling motor, you should connect it to batteries specially designed to power it. In most cases, a voltage of 12V, or 36V is enough to power it.

First, there are several things that should be close by:

*Circuit breakers

*A wrench set

*Jumper wires

With these items in place, you can now get down to business. First, ensure that all power switches are off to ensure electrical shocks don’t occur.

For a 12V trolling motor, connect it to one 12V battery by fastening the black negative lead from the motor to the negative terminal. Secure the red positive lead from the trolling motor to the positive battery terminal.

It is important that you include a 50-amp circuit breaker in this connection.

And if it is a 36V motor you are dealing, with the process will be longer as you will be connecting three 12V batteries to the system.

You see, it isn’t as complicated as you may have expected.

FAQs on High-Quality Fish Finder Batteries

Let’s also answer some of the common queries regarding the top fish finder batteries to boost your knowledge on the topic.

Q: What battery size is recommended for fish finders?

A: In most instances, fish finders need between 12 and 14 volts to run properly. Most of the batteries we have reviewed are 12V units and, therefore, adequate for fish finders. Then, most of these devices draw between 0.25 and 1 amp per hour, with the screen size and brightness being the determinant factors on the amperage draw.

Q: How do I charge a fish finder battery?

A: It is pretty simple as you have to do is connect the charger to the fish finder via the charging port and then plug it into the socket. However, always ensure that the charger is compatible with the battery beforehand.

Getting the wrong charger could lead to catastrophic consequences.

Q: What are the benefits of lithium-ion batteries?

A: There are several advantages of using li-ion units to power your fishfinder. These batteries are small and lightweight, have a longer life cycle than SLA batteries, need less time to recharge and do not experience a drop-off in power when they start discharging.

The Best Overall

In the end, we settled on ExpertPower 12V Sealed Lead Acid Battery as our top pick. They have a rugged build to last for a lifetime, are easy to install, plus have a wide operating temperature range.

Final Thoughts

If you are having a hard time finding the correct battery for your fish finder, we hope that this article has changed your situation. And with the right set of batteries, your device should have sufficient power to ensure that your fishing trip is as accurate and successful as you had hoped for.

Erick Thompson

Hi, I'm a fishing & kayaking enthusiast who enjoys sharing tips and tidbits with newbies, intermediates, and experienced anglers alike.

Leave a Comment

Your email address will not be published. Required fields are marked *