Best Kayak Fish Finder Battery

Updated on:

Best Kayak Fish Finder Battery

Updated on:

When making the choice on the best kayak fish finder battery for your needs, it is worth noting at the start of the process that there are three basic types:

  • AGM (absorbed glass mat) batteries
  • Lithium Ion batteries
  • Lithium Iron Phosphate (LiFePO4) batteries

There are important advantages and disadvantages to each type, which we have tried to summarize in the table below.

Our Best AGM Kayak Fish Finder Battery
Universal Power Group
Universal Power Group
9.5

The Universal Power Group battery is our clear winner here. All three products are similar in terms of performance and features, so it comes down to price and warranty. With the cheapest price and a two-year warranty, this product wins out.

Best Lithium Ion Kayak Fish Finder Battery
FPV
FPV
9.6

A standout winner here is the FPV lithium ion battery – it is purposely designed for kayak use. It’s an Australian made product that’s 100% safe and tested in the most gruelling marine conditions. A great product.

Best Lithium Iron Phosphate Kayak Fish Finder Battery
Dakota Lithium
Dakota Lithium
9.5

We haven’t listed any others as it is so hard to go past the Dakota Lithium model with its proven reputation, great performance and 11-year warranty. The clear choice in this category and comes with the appropriate charger.

Kayak Fish Finder Battery Choice Table

(based on a 12V 15Ah battery)

Absorbed Glass Mat
(AGM) deep cycle
Lithium IonLithium Iron Phosphate
Price~$40~$200~$100
Weight9lbs1.2lbs6lbs
DetailsCompletely sealed
No maintenance needed
Vibration and spill resistant
Copes with frequent discharge and recharge
Average lifespan (~5 years)
Extremely light weight
Quick to charge
Good discharge performance
Great lifespan
More than twice as light as AGM
Charges far faster than AGM
Good performance
Copes with frequent discharge and recharge
Long lifespan (~10 years)
Expensive
VerdictBEST CHOICE FOR COST CONSCIOUSBEST CHOICEALSO CONSIDER

Choosing A Kayak Fish Finder Battery

1. Decide Battery Size

Let’s assume a kayak fish finder draws no more than one amp of power. That means for a battery life of 10 hours, you can go with 10Ah battery.

That’s probably sufficient for one-day trips as even in the most comfortable Hobie kayak you wouldn’t want to be sitting in it for that amount of time.

For multiple day trips where you may not have access to a charger, you could consider a 15Ah model like we have done in the comparison table above.

2. Decide Battery Type

Consider the key criteria and in the table (weight, cost and features) and decide on the best battery for you. For us it is a choice of two – AGM or lithium ion.

We have some of each to be honest. The lithium ion models are very light, but we are fine with 7Ah batteries for short trips, so the AGM batteries are light enough and considerably cheaper.

battery for kayak fish finder

Kayak Fish Finder Battery Tips

  • Never mix battery types, nor old batteries with new batteries.
  • Choose the correct charger for your battery: AGM Battery chargers; Lithium Ion Phosphate battery chargers
  • Charge batteries as soon as possible after each use – leaving batteries in a discharged state will decrease their longevity and performance.
  • Check terminal connectors periodically for signs of corrosion – clean with a paste of baking soda and water.
  • Store batteries in a cool, dry place in the off-season and maintain a trickle charge.

Our Best Kayak Fish Finder Batteries – The Verdict

Selecting the correct trolling motor battery type and size is an important choice and we are confident this guide has made this much easier for. We outlined our top picks in each class in the box at the start of this article. Here below we spell out reasons for our choices.

Best AGM Kayak Fish Finder Battery

The Universal Power Group battery is our clear winner here. All three products are similar in terms of performance and features, so it really comes down to price and warranty. With the cheapest price and a two-year warranty, this product stands head and shoulders above the other two.

Best Lithium Ion Kayak Fish Finder Battery

A standout winner here is the FPV lithium ion battery – it is purposely designed for kayak use. It’s an Australian made product that’s 100% safe and tested in the most gruelling marine conditions. A great product.

Best Lithium Iron Phosphate Kayak Fish Finder Battery

We haven’t listed any others as it is so hard to go past the Dakota Lithium model with its proven reputation, great performance and 11-year warranty. The clear choice in this category and comes with the appropriate charger.

RELATED POSTS: Best kayak fish finderBest kayak trolling motorInflatable kayaks

best kayak fish finder battery

Kayak Fish Finder Batteries Reviewed:

Universal Power Group 12v 15ah Kayak Fish Finder Battery
Universal Power Group 12v 15ah Kayak Fish Finder Battery
Universal Power Group 12v 15ah Kayak Fish Finder Battery
Our Score

Well priced, durable and reliable, Universal Power Group AGM batteries are a great choice for powering your kayak fish finder

Key features:

  • Sealed AGM construction is spill free and vibration resistant
  • Light battery for the power produced
  • Low self discharge
  • Two-year warranty
Mighty Max Battery 12V 15Ah Trolling Motor Battery
Mighty Max Battery 12V 15Ah Trolling Motor Battery
Mighty Max Battery 12V 15Ah Trolling Motor Battery
Our Score

The Mighty Max is a popular kayak fish finder battery that is reputable and well priced.

These batteries use a state of the art, heavy-duty, calcium-alloy grid that provides exceptional performance and service life.

Key features:


Rechargeable spill proof battery
High discharge rate
Wide operating temperatures, long service life and deep discharge recover
One year warranty

VMAX Charge Tank 15Ah Kayak Fish Finder AGM Battery
VMAX Charge Tank 15Ah Kayak Fish Finder AGM Battery
VMAX Charge Tank 15Ah Kayak Fish Finder AGM Battery
Our Score

The VMAX Charge Tank is a marine grade AGM battery. It is completely sealed and maintenance free and involves no contaminants.

Key features:

  • Fast recharge
  • Sealed construction
  • One year warranty with a reduced-value replacement on a sliding scale beyond one year
FPV-Power Lithium-ion 17.5ah Battery (With Charger)
FPV-Power Lithium-ion 17.5ah Battery (With Charger)
FPV-Power Lithium-ion 17.5ah Battery (With Charger)
Our Score

These batteries are completely safe and come with a IP67 rated hard case and battery plug with a Battery Management System (BMS) that cuts off the power if there is an external short and protects the battery from over discharge when in use and overcharge when charging.

  • Purposefully designed for kayak use
  • High quality Japanese Li-Ion cells
  • Feather weight, durable and long-lasting
  • Comes with charger
Dakota Lithium 12V 10Ah
Dakota Lithium 12V 10Ah
Dakota Lithium 12V 10Ah
Our Score

Dakota Lithium is a specialist manufacturer of Lithium Iron Phosphate batteries for trolling motors and other marine/fishing applications. This 10Ah model is ideal to power a kayak fish finder.


It has a class-leading 11 year warranty and performs better in cold conditions than competing batteries

  • Active battery management system to handle discharge and charge, prevent overload
  • Includes charger
  • Super lightweight
  • Cheaper than lithium ion
https://youtu.be/YrPFO4LRSfo
Dakota Lithium’s lithium iron phosphate batteries are a great option for a lightweight, durable kayak fish finder battery
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AUTHOR
Rick Wallace is a passionate angler and fly fisher whose work has appeared in fishing publications including FlyLife. He's appeared in fishing movies, founded a successful fishing site and spends every spare moment on the water.