Best Kayak Depth Finder Battery 2021

A fish finder helps you find the right spots and explore wildlife. But it can’t work without a battery – and not all batteries are made equal.

Batteries made with old school technology can leak poisonous materials and don’t work well.

But don’t worry. We have curated the best kayak depth finder batteries for all day fishing:

1. CB ChromeBattery12V 7AH Sealed Lead Acid Battery

Chromebattery is a reliable brand of rechargeable batteries. The 12V 7AH battery is perfect for fish finders and can last a long time. It is made with lead calcium alloy and absorbed glass mat technology. It requires almost no maintenance yet it can function for a long time. It is also spill proof. It comes with a patented sealed post that prevents corrosion and prolongs its battery life.

The battery is easy to use. It comes fully charged, so you just have to plug it in and it is ready to go. It comes with clear tabs that allow you to hook it up with your fish finder.

The battery can be recharged as many as 2000 times. Users who tried out the battery reported that it lasts 6-7 hours on a single use. One often overlooked aspect is the durability – customers often worry more about run time and less about durability. This chrome battery is made to last because it uses quality materials and has undergone stringent testing for quality control.

Pros

  • Comes ready to use
  • Low-maintenance
  • One year warranty
  • Corrosion resistant
  • Good run time
  • Can be used for alarm systems and other purposes

Cons

  • None as such
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2. Universal Power Group 12V 9AH Battery

The 12V 9AH battery from Universal Power Group is a best seller. This is for many reasons. First, it is maintenance free and spill proof. It is also resistant to shock and vibration. This means it will last longer than other batteries. You can mount it in any position, which makes it easy to use and utilizes the space inside the boat effectively.

Its run time is quite long – it can run for 8 hours on full charge at least. The charger also comes with an indicator light to make things easier.

The battery comes with a one year warranty to give you peace of mind. It comes with a 6V/12V lead acid charger that charges the battery reasonably fast. It weighs just 5.17 lbs, so you can set it up easily. The charger, however, feels a bit cheap as per user reports. You can buy a more expensive lithium battery, but if you want something cheap, the Universal Power Group 12V 9Ah is a great option.

The downside is that there is no dividing wall to make sure that a metal object does not short the two terminals. On the positive side, most users were satisfied with how easy to use it is and how long it lasts.

Pros

  • Affordable
  • Good run time
  • Maintenance free
  • One year warranty
  • Lightweight
  • Resists shock or vibration

Cons

  • No dividing wall to avoid short circuit
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3. Mighty Max ML9-12 – 12 V 9 Ah Rechargeable SLA Battery

If you want a cheap and efficient battery, there is nothing better than the Mighty Max ML9-12. It is a 12V 9AH sealed lead acid battery. Like other batteries reviewed above, it is also maintenance free – to ensure you don’t get any headaches while keeping it over the long-term. You don’t need to clean it either, it can last for years without requiring any major effort. The battery weighs just 5.5 lbs, so you can handle it without any hassles.

The battery does not come with any accessories such as mounts or wire harness. You need to buy these on your own. This battery mounts in any position on your kayak and resists shock and vibration to give you a smooth experience. Its case allows you to carry it safely. It has a 7AH case size although it is a 9AH battery, so that’s a bonus.

Many kayakers reported getting longer run times on this battery than their previous ones. One user even reported using it for an entire day. Even with several LED lights powered through it, it can last 4 hours. Since it is compact in size, you can buy multiple units for long trips.

Pros

  • Long running time due to high amperage
  • Affordable
  • Compact and lightweight

Cons

  • Not very durable, but good for the price
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4. ExpertPower 12v 7ah Rechargeable Sealed Lead Acid Battery

ExpertPower 12V 7Ah battery is perfect if you want a SLA battery for your kayak fish finder. The battery is available both as a 1-pack and a 2-pack. One battery weighs just 4.3 pounds, so you can set it up easily. It is compact and lightweight, which makes it easy to use.

It is a 12V 7Ah battery that gives a sufficient run time for long fishing trips. In fact, some users are able to use it for as long as 12-15 hours on a single charge. It also charges quickly. Like most fish finder batteries, this one is maintenance free as well. It is also valve regulated for optimal functioning.  

It comes with a sturdy carrying case that is impact resistant. The case is made with non-conductive ABS resistant plastic. It is affordable and easy to use, unlike many batteries made by name brands. Users also love that it can last over a year of use, unlike other cheap batteries.

Overall, the Expert Power 12V 7Ah is a great battery if you want something cheap yet durable. Its long running time of 10-12 hours also makes it the best in the budget segment.

Pros

  • Cheap yet durable
  • Long run time – 10-12+ hours
  • Easy to set up
  • Compact and lightweight
  • Works fully well after 1+ years

Cons

  • None as such

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5. Power Sonic 12V 7AH 570 Portable Fish Finder Battery

Do you want more power on a budget? Check out this 2-pack of Power Sonic 12V 7 Ah batteries. The battery just weighs 4.8 lbs, so you set it up easily without any hassles. The battery is lead acid and maintenance free. It is also spill proof. You can mount this in any position and it will stay stable, impervious to shocks and vibrations. It comes with a one-year warranty to give buyers peace of mind.

The best thing is that one battery lasts for two days even at full brightness. This battery run time is remarkable. The batteries are sealed which gives more peace of mind. The batteries come fully charged right out of the package so you can set them up and get things going rather quickly.

Users love that you get two batteries at the price of one. The battery is high-quality and durable. The icing on the cake is that the battery is made specially for fish finders. So it delivers more run time and better performance.

Pros

  • Two batteries in the price of one
  • Sturdy and durable
  • Long run time
  • Spill proof, shock resistant
  • Maintenance free
  • Lightweight

Cons

  • None as such

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6. Dakota Lithium 12 Volt Rechargeable Battery – 12 V 10Ah

If you don’t want sealed lead acid batteries and want a lithium battery, the Dakota Lithium 12V is a compelling option. Dakota batteries are class apart from other batteries – this is also the reason they are thrice as expensive as lead acid batteries. They are backed by the company’s 11-year warranty, which is amazing.

The batteries deliver 2000 cycles so you can expect them to last well over multiple years. In comparison, lead acid batteries don’t last more than a year. The batteries come with cell balancing, low and high voltage cutoff, short circuiting as well as temperature protection. This not only improves the regular performance of the battery but also increases its durability.

Note that the usable capacity for lithium batteries is usually 80 percent of the advertised capacity. So you can use up to 10 amp hours from this battery without lowering voltage under 11.2 volts. Make sure to store the battery on less than full charge to enhance its life.

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7.ExpertPower 12V 10Ah Lithium LiFePO4

ExpertPower 12V 10Ah battery is a solid option if you don’t like SLA (sealed lead acid) batteries. Although lithium batteries are expensive, they cost the same as lead acid batteries since they are much more durable. In fact, as per the company’s claims, the LiFePO4 battery can last as long as 10 years.

The battery also weighs just one-third of the weight of a typical lead acid battery which makes it easy to use and install. It is also worth noting that the battery is compact and saves a lot of space on your kayak. The battery is available in multiple power variants – 10 Ah, 20 Ah, 50Ah, 100 Ah and 200 Ah. This lithium battery also charges much faster than lead acid batteries.

This battery has received a lot of positive reviews from customers. A lot of kayakers use it to power their trolling motors as well as fish finders. The fact that it can deliver so much power in such a small size is amazing.

Since the brand has a good reputation and has been in business for a long time, you can buy the battery with peace of mind. One area of improvement according to us is that the battery should come with a waterproof case to guard it against the elements.

Another important thing is that the battery doesn’t come with a charger. So you will have to buy your own. This further adds to its cost but worth it since this is a beast in a small package.

Pros

  • 10 year life
  • 2500+ power cycles
  • Small size but can power even a trolling motor
  • Reliable brand

Cons

  • No waterproof case included
  • Doesn’t come with a charger

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8.2000 Cycles 12V 6Ah Miady Lithium Iron Phosphate Battery

Miady Lithium Iron Phosphate battery is a high-quality Lithium battery to power up your fish finder. This 12V 6Ah battery is an excellent option since it is inexpensive despite being a Lithium battery.

It can last 2000+ cycles which is amazing for the price. A lithium battery like this can be fully discharged without any potential risk. It isn’t inflammatory and doesn’t leak any poisonous acids. You can mount this battery in any direction without worrying about leaking like a lead acid battery.

The battery weighs just 1.65 lbs so you can handle and install it easily. It doesn’t put stress while you set it up, not does it cause any strain on the area it is installed.

One thing you need to note is it doesn’t work like a lead acid battery. You need to read the specifications sheet carefully. The battery works only for an average charge or discharge rate of 1.2A. Although you can crank it up to 6A but it will reduce the discharge cycles of the battery.

This battery comes with an internal battery management system (BMS) that cuts off charging when the voltage reaches 14.6V. It also cuts off discharging when the voltage reaches 10V.

Pros

  • Small and lightweight
  • Efficient battery management system
  • Durable, 2000+ cycles
  • Easy to set up

Cons

  • None as such, but not meant for high power applications

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Frequently Asked Questions

1.What size battery do I need for my fish finder?

You can use a 10Ah battery for most kayak fish finders. You can use a higher capacity battery if you want to power additional components such as LED lights but 10Ah is enough to power a fish finder for about 6 hours on a single charge.

2.What is the best battery for a kayak trolling motor?

The best battery for a trolling motor is the Dakota Lithium 12V 9Ah. You can use any 12V battery to power up a kayak trolling motor but a lithium battery will always work better and last much longer than a lead acid battery.

3.How long does a kayak battery last?

A kayak battery can last anywhere from 5-6 hours to 12-16 hours or more depending on its capacity. In theory, a 9Ah battery can supply 0.5 amps of power for 18 hours (18*0.5=9Ah). But in reality, the actual run times can be 20% less than this theoretical number. So check the specs before you buy a battery.

4.How do you store batteries in a kayak?

Ideally, you should keep batteries in a waterproof case to guard them against the elements. Proper storage is critical for lead acid batteries since they contain poisonous acids. Lithium-ion batteries are easier to store. Make sure to keep the battery cool and dry. You can even make a DIY battery box to secure it well.

5.Do I need a separate battery for my fish finder?

You don’t necessarily need to have a separate battery for your fish finder if you use a good starting battery for other components like a trolling motor. But you need to check the capacity of the battery to ensure it can supply power to all your components for a long enough time.

Final Thoughts

Kayak fish finder batteries come in a lot of varieties. Do make the basic checks to ensure its quality and capacity. The battery type – whether it is a lead-acid battery or a lithium-ion, determines how well it will perform and how long it will last.

 

Our top pick is the ChromeBattery12V 7AH SLA battery since it is affordable yet super powerful for a fish finder. Make sure to check it out!