Powering your fish finder is arguably the most critical part of your kayak fishing setup. A reliable battery means uninterrupted scanning, accurate readings, and more time focusing on the fish, not your power levels. With the limited space and harsh marine environment of a kayak, choosing the right battery and mounting solution requires careful consideration.
This roundup simplifies your search by presenting the top 10 batteries and integrated systems designed for kayak anglers. We’ve selected options based on battery chemistry, capacity, durability, and innovative mounting solutions to ensure you find the perfect power source for your next adventure on the water.
Our Recommended Batteries and Power Systems
- YakAttack CellBlok with Switchblade Transducer Arm
- GOLDENMATE 12V 10Ah LiFePO4 Lithium Battery
- usvehj Track Mounted Battery Box for Fish Finders
- OKMO 12V 15Ah LiFePO4 Lithium Battery
- ExpertPower 12v 7ah Rechargeable Sealed Lead Acid Battery
- Mighty Max Battery ML12-12 – 12 Volt 12 AH
- NOCO Lithium NLP20: Ultra-Light 12V Lithium Powersport Battery
- Mighty Max Battery ML18-12 – 12 Volt 18 AH
- Dakota Lithium – 12V 7Ah LiFePO4 Deep Cycle Battery
- Deka 12V 7Ah Sealed Lead Acid (SLA) Battery
YakAttack CellBlok with Switchblade Transducer Arm
This is more than just a battery; it’s a complete, integrated power and mounting solution. The YakAttack CellBlok system combines a track-mounted battery box with a platform for your fish finder display and pairs it with the SwitchBlade Transducer Arm. This all-in-one approach streamlines your entire setup, reducing clutter and saving valuable deck space on your kayak.
A key benefit for kayak owners is the no-drill installation. The system attaches securely to standard kayak tracks by simply loosening two knobs, eliminating the need to create permanent holes in your hull. The updated CellBlok is lightweight at 1.4 lbs and features a spacious interior designed to fit 10Ah batteries, along with larger cable wraps to accommodate modern fish finder units.
GOLDENMATE 12V 10Ah LiFePO4 Lithium Battery
For anglers seeking a high-performance standalone battery, the GOLDENMATE LiFePO4 is a top contender. It provides a robust 10Ah of power in a package that weighs just 3.3 pounds, making it easy to transport and helping to keep your kayak lightweight. Its IP67 waterproof rating is a significant advantage for the marine environment, offering protection against splashes and brief immersion.
The battery’s longevity is a major selling point. It is rated for over 5000 deep cycles and has a potential lifespan of 10 years, far exceeding traditional lead-acid batteries. A built-in Battery Management System (BMS) safeguards against common issues like overcharging, over-discharging, and short circuits, providing peace of mind during long days on the water.
usvehj Track Mounted Battery Box for Fish Finders
If you already have a battery and a transducer arm but need a secure way to mount them, the usvehj battery box is an excellent alternative. It is designed as a direct replacement for the YakAttack CellBlok (CLB-1002), offering wide compatibility with various kayak track systems. This box provides a stable platform for your fish finder display and integrates with arms like the YakAttack Switchblade.
Installation is straightforward and requires no drilling, preserving the integrity of your kayak. The interior is spacious enough to fit most 7, 9, or 10Ah 12V batteries. Constructed from premium composite materials, it is built to be both durable and lightweight, capable of withstanding the rigors of saltwater and freshwater use.
OKMO 12V 15Ah LiFePO4 Lithium Battery
For those who need extended runtime for multi-day trips or powerful units, the OKMO 12V 15Ah battery offers a higher capacity. It maintains the benefits of lithium iron phosphate technology, including a light weight of just 3.5 lbs and a stable, safe chemistry. The higher amp-hour rating means you can fish longer between charges.
This battery is built to last, with a rating of over 4000 cycles and a 10-year lifespan. It supports 100% depth of discharge, allowing you to use the full capacity without damaging the battery. The integrated 15A BMS provides comprehensive protection against overcurrent, overheating, and short circuits, and includes a specific low-temperature charging protection feature for safety.
ExpertPower 12v 7ah Rechargeable Sealed Lead Acid Battery
As a trusted and highly-reviewed option, the ExpertPower sealed lead acid (SLA) battery represents a reliable and cost-effective choice. It’s a genuine maintenance-free and valve-regulated battery, meaning there is no need to add water and it can be operated in any orientation without risk of leakage.
This 12V 7Ah battery is a standard size that fits many popular battery boxes and is sufficient for powering most fish finders for a full day of fishing. While heavier than lithium alternatives, it provides a proven and affordable power solution for anglers on a budget or those who do not require the advanced features of lithium chemistry.
Mighty Max Battery ML12-12 – 12 Volt 12 AH
The Mighty Max ML12-12 offers a step up in capacity from a standard 7Ah battery while remaining within the SLA/AGM category. This 12Ah battery provides more energy for longer trips without venturing into the higher cost of lithium. It is UL Certified, ensuring it meets specific safety standards.
As a sealed lead acid battery, it is spill-proof and maintenance-free, making it a hassle-free option for kayak use. It features a high discharge rate and is designed for a long service life with good deep discharge recovery, meaning it can handle being drained and recharged repeatedly.
NOCO Lithium NLP20: Ultra-Light 12V Lithium Powersport Battery
NOCO brings its reputable battery technology to the table with the NLP20. This ultra-lightweight lithium powersport battery is engineered for insane performance, delivering over 600 amps of starting power. While overkill for just a fish finder, it’s an ideal choice for kayaks with auxiliary electric motors or for anglers who want one premium battery for multiple applications.
It offers a substantial cycle life of up to 2,000 cycles and is backed by an intelligent BMS that protects against a wide range of faults. The battery ships pre-charged and requires no activation or maintenance, providing a true plug-and-play experience.
Mighty Max Battery ML18-12 – 12 Volt 18 AH
For the kayak angler who needs maximum runtime from a lead-acid battery, the Mighty Max ML18-12 is a high-capacity option. With 18Ah, this battery can power a fish finder for multiple long days on the water without needing a recharge. It uses Nut and Bolt terminals, which can provide a very secure connection for your power cables.
Like its smaller sibling, this SLA/AGM battery is spill-proof, maintenance-free, and UL Certified. Its characteristics include a high discharge rate and solid performance across a wide range of operating temperatures, making it a dependable workhorse for serious anglers.
Dakota Lithium – 12V 7Ah LiFePO4 Deep Cycle Battery
Dakota Lithium is a well-known name in the outdoor and fishing communities, and this 12V 7Ah battery is built to their rugged standards. It’s a pure deep-cycle battery, meaning it’s designed to be discharged and recharged consistently, which is the exact use case for a fish finder.
It delivers over 2,000 cycles and is backed by an impressive 11-year USA warranty, highlighting the company’s confidence in its product. The battery includes a built-in BMS for cell balancing and protection against short circuits and voltage extremes, ensuring reliable performance trip after trip.
Deka 12V 7Ah Sealed Lead Acid (SLA) Battery
Deka is a manufacturer known for producing high-quality batteries, and their 12V 7Ah SLA model is a reliable and widely available option. This battery serves as a solid, no-fuss power source for kayak fish finders. It is sealed and maintenance-free, eliminating any concerns about acid leaks or upkeep.
As a lead-acid battery, it offers a proven technology at an accessible price point. It provides sufficient capacity for a full day of fishing for most units and is a direct fit for many standard battery boxes. For anglers seeking a dependable and straightforward battery from a reputable brand, the Deka is a strong candidate.
Buying Guide: How to Choose the Best Batteries for Fish Finders in Kayaks
Choosing the right battery for your kayak fish finder isn’t just about picking the one with the biggest number. It’s about finding the perfect balance of power, weight, and size for your specific setup. I’ve spent a lot of time on the water testing different power sources, and I can tell you that getting this decision right makes a huge difference in your overall experience. A good battery means more time fishing and less time worrying about your electronics dying.
The first thing I always look at is the battery type. For kayak anglers, you’re typically choosing between sealed lead-acid (SLA), lithium iron phosphate (LiFePO4), and sometimes standard lithium-ion. SLA batteries are the old reliable; they’re affordable but heavy for their power output. Lithium options are the new standard for a reason. They are incredibly lightweight, last much longer, and can be discharged more deeply without damage. A LiFePO4 battery, in particular, is my top pick for safety and longevity. It’s a bit more of an investment upfront, but it pays for itself over time.
Next up is capacity, measured in amp-hours (Ah). This tells you how long the battery will run. To figure out what you need, check your fish finder’s specs for its amp draw. A common unit might draw around 1 amp per hour. If you have a 10Ah battery, you can theoretically run that unit for 10 hours. I always recommend getting a battery with at least 25-50% more capacity than you think you’ll need for a full day on the water. A 10Ah to 20Ah battery is usually the sweet spot for a full day of kayak fishing.
Physical size and weight are critical in a kayak. Every pound and every inch of space matters. Lithium batteries are the clear winner here, often being less than half the weight of a comparable SLA battery. You need to make sure the battery will fit securely in your kayak’s storage compartment or your designated battery box. A battery that shifts around is a hazard.
Finally, consider the features. Look for a battery that is truly sealed and waterproof, not just “splash-resistant.” You’re on a kayak, and water is a constant companion. Built-in USB ports are incredibly handy for charging phones or other devices. A state-of-charge meter is also a great feature, so you’re not guessing how much juice you have left. When you’re looking for the 10 best batteries for fish finders in kayaks, focusing on these key factors will lead you to a power source that is reliable, safe, and perfectly suited for your adventures.
FAQ
How long will a 10Ah battery run my fish finder?
This depends entirely on your fish finder’s power consumption. You need to find its amp draw in the manual or on the manufacturer’s website. Let’s say your unit draws 1 amp per hour. A 10Ah battery would give you roughly 10 hours of runtime. However, it’s not a good idea to fully drain most batteries. To be safe and extend your battery’s life, plan on using only about 80% of its capacity. So, in this example, a 10Ah battery would reliably power a 1-amp unit for about 8 hours. For longer days, I’d suggest moving up to a 15Ah or 20Ah battery.
Are lithium batteries really worth the extra cost for kayak fishing?
In my opinion, absolutely. The higher initial price is the main drawback, but the benefits are substantial for a kayak angler. Lithium batteries, especially LiFePO4, are significantly lighter—sometimes a third of the weight of a comparable lead-acid battery. This is a massive advantage when you’re loading and unloading your kayak. They also last for many more charge cycles, meaning they’ll last for years longer. You can use almost all of their capacity without harming them, and they hold their charge much better when stored. For a piece of gear you rely on, the upgrade is worth it.
How should I store and charge my kayak fish finder battery?
Proper care will greatly extend your battery’s life. For storage, especially during the off-season, make sure it’s charged to about 50-70%. Never store it completely drained or at 100% charge for long periods. Keep it in a cool, dry place. For charging, always use the charger that came with the battery or one that is specifically recommended by the manufacturer. Using the wrong charger can damage the battery and even create a safety risk. I make it a habit to recharge my battery as soon as I get home from a trip.
What’s the best way to secure a battery in my kayak?
Security is non-negotiable. A loose battery is dangerous and can damage your kayak. The best method is to use a dedicated, waterproof battery box. These boxes are designed to hold specific battery sizes and often have terminals inside to prevent shorts. You can then secure the box itself using the existing bungee cords in your kayak’s tank well, or by installing a strap or a piece of velcro to hold it firmly in place. For a truly permanent setup, some anglers create a custom foam insert that cradles the battery perfectly. The goal is zero movement.
Can I use a car battery for my fish finder on a kayak?
I strongly advise against it. A standard car battery is far too heavy, large, and not designed for the marine environment. It’s a flooded lead-acid battery, which means it can spill dangerous acid if it tips over—a real possibility in a kayak. The weight distribution would also be terrible for your kayak’s stability and performance. Stick with purpose-built, sealed marine batteries. When selecting from the 10 best batteries for fish finders in kayaks, you’ll find options that are safe, lightweight, and designed specifically for this application.