9a.m. - 5p.m. est. Monday - Friday

1-877-650-4PHL (4745)

How To Choose a Battery for Your Fish-Finder Device

A large tree has fallen over a driveway, and an orange traffic cone is near it. Its roots are sticking up in the air.

Clint Strefling |

While, in the past, successful fishing required years of instinct and experience, today, people rely on fish-finders to help them locate their catch underwater. This kind of gear can elevate your fishing game, whether you’re a professional angler or someone who enjoys leisurely trips.

However, keep in mind that your fish-finder is only as good as its power source. In this post, we’ll explore how to choose a battery for your fish-finder device. By the time you’re done reading, you’ll have the know-how to keep your equipment operating without a hitch.

Understanding Your Fish-Finder: Voltage and Ampere Requirements

Before you buy a battery, you should explore the technical needs of your fish-finder. Most devices rely on specific voltage and ampere-hour (Ah) requirements that determine their operational efficiency. If your battery is incompatible, it won’t power your fish-finder to the fullest.

Here are some important fish-finding battery requirements to know before you begin shopping around.

Voltage

Most portable fish-finders operate on either 12- or 24-volt systems. Check your fish-finder’s specifications to confirm the required voltage. Using a battery with an incorrect voltage can damage your device or lead to subpar performance.

Ampere-Hours (Ah)

The Ah rating indicates how long a battery can supply power. For example, a 10Ah battery can provide 1 amp of current for 10 hours or 2 amps for five hours. To calculate your fish-finder’s power demands, check its current draw, measured in amps, and match it with the anticipated usage time. A higher Ah rating often means more operational hours per charge.

A man sitting on an inflatable fishing boat filled with different rods and equipment, including a fish-finder.

Battery Types for Fish-Finders

Different battery types are available for fish-finders, each with its advantages and limitations. Below are three common types to know.

Lead-Acid Batteries

Lead-acid batteries are a popular choice for powering fish-finders, primarily due to their affordability and widespread availability. These batteries are durable and can handle moderate energy requirements, making them suitable for casual or short-duration fishing trips.

However, lead-acid batteries tend to be heavier and bulkier compared to other options, which may not be ideal for portable boating setups. Additionally, these batteries require regular maintenance, such as maintaining proper charge levels and avoiding deep discharges, to promote longevity and optimal performance.

Absorbed Glass Mat (AGM)

AGM batteries are an advanced type of lead-acid battery that offers improved performance and convenience. They’re designed with fiberglass mats that absorb the electrolyte, making the battery spill-proof and maintenance-free.

AGM batteries provide better durability and higher energy efficiency compared to traditional lead-acid options, making them suitable for more demanding fishing trips or setups requiring reliable power. Additionally, these batteries have a lower self-discharge rate, meaning they can retain their charge longer when not in use.

However, these benefits come at a higher cost, as AGM batteries can be pricey, which may be a consideration for budget-conscious anglers.

Lithium-Ion Batteries

Lithium-ion batteries have become increasingly popular among anglers due to their lightweight design and high energy density. These batteries offer unmatched performance, providing longer run times and faster charging compared to AGM and traditional lead-acid batteries. Lithium-ion batteries can endure significantly more charge cycles, making them a cost-effective investment in the long term.

They also feature a consistent power output, maintaining optimal performance throughout their discharge cycle. Despite these benefits, the higher initial cost of lithium-ion batteries remains a factor to consider. Additionally, anglers must ensure their equipment is compatible with lithium-ion technology to fully leverage its advantages.

Mushrooms are growing in the crevices of bark on a tree. The fungi are gray on top and light-yellow underneath.

Choosing the Right Battery for Your Fish-Finder

Here’s a simplified way to help you choose the perfect battery for your fish-finder:

  • Check compatibility: Confirm the battery you choose is compatible with your fish-finder model and its power requirements. Consult the user manual for specific voltage and current guidelines.
  • Determine power needs: Calculate the energy consumption of your fish-finder, choosing a battery that offers sufficient capacity to last through your longest fishing trips.
  • Consider weight and portability: For portable fish-finders or smaller boats, lighter batteries like lithium-ion are preferable for easy transport and installation.
  • Choose weather-resistant options: Invest in a battery that can withstand exposure to water, dirt, and extreme weather conditions for better longevity.
  • Evaluate charging time: Look for a battery with a reasonable charging time, especially if you need it ready on short notice. Quick-charging options can be a huge advantage.
  • Budget wisely: Balance your budget with performance. While initial costs for advanced batteries may be higher, their long-term efficiency and lifespan can make them more economical.
  • Read reviews and recommendations: Check user reviews or seek advice from fishing communities to learn about reliable battery brands and models.

Maintenance Tips for Longevity

A good battery is an investment worth maintaining. Keep these tips in mind to maximize its lifespan:

  • Regular charging: Never allow a battery to fully discharge. Recharge it promptly after each use.
  • Clean terminals: Wipe the connections with a damp cloth to prevent rust or corrosion.
  • Store properly: Lead-acid and AGM batteries should be stored in cool, dry places. Lithium-ion batteries fare better in environments with stable temperatures and minimal humidity.
  • Periodic testing: Check voltage levels regularly using a multimeter to confirm that the battery is performing optimally.

By taking the time to care for your battery cells, you’ll have reliable, efficient power source for your fish-finder throughout the duration of your trip.

Power Up Your Fishing Adventures

Choosing the right battery for your fish-finder can have a huge impact on your overall fishing experience. By exploring the ins and outs of your power options, you’ll have the know-how to make an informed decision tailored to your needs.

With PowerHouse Lithium’s range of batteries for marine applications, you can get more out of all your activities on the water. Our 16v lithium deep-cycle batteries​ offer hours of power so you can enjoy your adventures to the fullest. Connect with our team today to see what we can do for you!