Powering a trolling motor for an entire day on the water requires a reliable and robust battery. The wrong choice can leave you stranded, while the right one ensures a seamless, quiet, and productive fishing experience. This guide is dedicated to helping you find that perfect power source for your kayak.
We’ve compiled a list of the top-performing batteries, from traditional lead-acid to advanced lithium options. Whether you prioritize lightweight portability, maximum runtime, or the latest in battery technology, there’s an option here to keep you trolling from dawn until dusk without a worry.
Our Top Battery Picks for All-Day Kayak Trolling
- Newport 12V50Ah Deep Cycle Heavy-Duty Marine Battery
- Newport Kayak Series 36lb Thrust Transom Mounted Saltwater Electric Trolling Motor
- Mighty Max Battery 12V 35AH Wilderness Tarpon 100 Kayak Trolling Motor Battery
- Timeusb 12V 50Ah Trolling Motor LiFePO4 Battery with Low-temp Protection
- Qty2: VMAX SLR125 AGM Sealed Deep Cycle 12V 125Ah Batteries
- ExpertPower 12v 33ah Rechargeable Deep Cycle Battery
- UPG Universal Power Group UB121000 12V 100Ah Solar Wind AGM SLA DEEP Cycle VRLA Battery
- Dakota Lithium 12V 100Ah Deep Cycle LiFePO4 Battery
- Ampere Time 12V 100Ah LiFePO4 Lithium Battery
Newport 12V50Ah Deep Cycle Heavy-Duty Marine Battery
For kayak anglers who value ease of transport, the Newport 12V50Ah battery is a standout choice. Weighing only 32 pounds, its lightweight design makes getting it to and from the water a simple task. This is a significant advantage when space is limited and every pound counts on a small vessel.
This battery is a sealed AGM (Absorbent Glass Mat) lead-acid battery, which means it is maintenance-free, leak-proof, and can be mounted in various positions. It is specifically engineered to be compatible with trolling motors, providing the steady, reliable power needed for long hours of operation. You can trust in its durable construction for consistent performance trip after trip.
Newport Kayak Series 36lb Thrust Transom Mounted Saltwater Electric Trolling Motor
While primarily a motor, this Newport Kayak Series unit is included for its integrated LED battery indicator, a crucial feature for monitoring your power levels directly from the handle. The 24-inch fiberglass shaft is perfectly sized for kayaks, allowing for variable depth placement to suit different water conditions.
With 8 speed settings (5 forward and 3 reverse) controlled by a telescoping handle, you have precise command over your movement. It is officially rated for saltwater use, thanks to its corrosion-resistant construction featuring aluminum, magnesium, and stainless-steel hardware. This motor is designed to pair with a standard 12V lead-acid battery for reliable thrust.
Mighty Max Battery 12V 35AH Wilderness Tarpon 100 Kayak Trolling Motor Battery
The Mighty Max ML35-12 is a compact and reliable power source specifically branded for kayaks like the Wilderness Systems Tarpon 100. Its smaller 35Ah capacity makes it an excellent option for shorter trips or for anglers who use their trolling motor more sparingly.
As a sealed lead acid (SLA) and AGM battery, it is completely maintenance-free and spill-proof, a critical safety feature on a kayak. It boasts a high discharge rate and good performance across a wide range of operating temperatures. Its compact dimensions allow it to fit neatly into tight kayak storage compartments.
Timeusb 12V 50Ah Trolling Motor LiFePO4 Battery
Step into the future of battery technology with the Timeusb LiFePO4 battery. It features advanced low-temperature protection, which automatically cuts off charging below freezing to protect the battery cells, a feature not always found in standard lithium batteries. This ensures longevity and safety in colder climates.
With a robust 50A BMS (Battery Management System) and a 1.2C (60A) discharge capability, it can handle the high demands of powerful trolling motors. Furthermore, its IP65 waterproof rating provides excellent defense against rain, splashes, and humid conditions, making it an ideal and durable companion for any marine environment.
VMAX SLR125 AGM Sealed Deep Cycle 12V 125Ah Batteries (2-Pack)
This two-pack of VMAX SLR125 batteries is for the kayak angler planning extremely long excursions or who needs to power additional electronics like a livewell or a powerful fish finder. Each battery offers a massive 125Ah capacity, and when used together, they can provide extended runtime that few other setups can match.
These are high-quality AGM deep cycle batteries known for their resilience and long float service life of 8 to 10 years. They are a premium lead-acid option designed for demanding applications, including solar and wind power, which speaks to their ability to handle deep, repeated discharge cycles.
ExpertPower 12v 33ah Rechargeable Deep Cycle Battery
ExpertPower has built a reputation for producing some of the most trusted and highly-reviewed sealed lead acid batteries available. The EXP1233 model is a 12V 33Ah battery that balances capacity with a compact and rugged form factor.
Crafted with AGM technology, it provides reliable performance across a wide temperature range and is built to resist vibration and shock. This battery is an excellent, no-fuss option for kayakers seeking a dependable and proven power source for a day on the water without the need for the highest capacity.
UPG Universal Power Group UB121000 12V 100Ah AGM SLA Battery
The UPG UB121000 is a workhorse 100Ah AGM battery that delivers substantial power for all-day trolling. Its Group 30H size is a common footprint, making it easier to find a compatible box or mounting solution for your kayak. It is UL Listed, ensuring it meets high safety standards.
Utilizing Absorbent Glass Mat (AGM) technology, this battery is completely sealed and maintenance-free. A key feature is its versatile mounting capability; it can be installed on its side or even upside-down without risk of leakage, providing great flexibility for fitting it into the unique confines of a kayak.
Dakota Lithium 12V 100Ah Deep Cycle LiFePO4 Battery
Dakota Lithium is a well-respected name in the lithium battery space, known for building durable and high-performance batteries for outdoor enthusiasts. Their 12V 100Ah model offers an exceptional power-to-weight ratio, providing the capacity of a heavy lead-acid battery in a much lighter and more compact package.
Built with LiFePO4 chemistry, it promises a vastly longer lifecycle, often exceeding 2000 cycles, and can be discharged much more deeply than AGM batteries without causing damage. This means you can use more of your stored power on every trip. It’s a premium investment for serious kayak anglers who demand the best.
Ampere Time 12V 100Ah LiFePO4 Lithium Battery
Ampere Time offers a compelling lithium iron phosphate (LiFePO4) battery that brings advanced technology at a more accessible point. This 12V 100Ah battery is incredibly lightweight compared to its AGM counterparts and offers a stable power output, which can help your trolling motor run more efficiently.
It features a built-in Battery Management System (BMS) for protection against common issues like overcharging and over-discharging. With the ability to last for thousands of charge cycles, this battery represents excellent long-term value and reliability for kayakers ready to upgrade to lithium power.
Buying Guide: How to Choose Your Kayak Trolling Motor Battery
Choosing the right battery for your kayak trolling motor isn’t just about run time; it’s about safety, weight, and getting back to the dock without a paddle. I’ve spent countless hours on the water testing different setups, and the core of your decision comes down to a few key factors. Let’s break them down so you can make an informed choice for your needs.
First, you need to understand battery chemistry. For a long time, lead-acid was the only option. They’re cheap upfront but heavy, and you can’t drain them completely without damaging them. AGM (Absorbent Glass Mat) batteries are a sealed, maintenance-free version of lead-acid and are a decent, reliable step up. However, for all-day kayak trolling motor performance, Lithium Iron Phosphate (LiFePO4) is the modern king. They are significantly lighter, can be discharged nearly 100% without harm, last for thousands of cycles, and hold a consistent voltage, which means your motor runs at peak power until the battery is almost empty. The higher initial cost is easily justified by their longevity and performance.
Next is capacity, measured in Amp-hours (Ah). This is your fuel tank. A common mistake is underestimating how much power you’ll use. A good starting point for a full day of casual trolling and moving spots is a 50Ah to 100Ah battery. To get a rough estimate of your needs, check your trolling motor’s amp draw at your typical speed setting. If it draws 10 amps, a 50Ah battery would theoretically last 5 hours. But with a lithium battery, you can use almost all of that capacity. With a lead-acid, you should only use about half, meaning you’d need a 100Ah lead-acid to get the same usable runtime as a 50Ah lithium.
Physical size and weight are huge for kayakers. Every pound matters for stability and transport. A 100Ah lithium battery can weigh as little as 25 pounds, while a comparable lead-acid can be 60+ pounds. Always check the battery’s dimensions to ensure it will fit securely in your kayak’s storage compartment or your chosen mounting spot.
Finally, consider the features. A good battery management system (BMS) is non-negotiable for lithium batteries, as it protects against overcharging, deep discharge, and short circuits. Look for batteries with built-in USB ports for charging phones or fish finders, and a clear state-of-charge meter. Quality connectors and a reliable charger designed for your battery’s chemistry are also essential for a smooth experience. Investing in the right power source is the single best way to ensure you get the most out of your 9 best battery options for all-day kayak trolling motor performance.
Frequently Asked Questions
What is the real-world runtime difference between a 50Ah lithium and a 100Ah lead-acid battery?
This is a classic comparison. While they have the same Amp-hour rating, their usable capacity is vastly different. You can safely use over 90% of a lithium battery’s capacity (about 45Ah from a 50Ah battery). With a lead-acid, you should only drain it to about 50% to preserve its lifespan, giving you only 50Ah from a 100Ah battery. So, in practice, a 50Ah lithium battery will often outlast a 100Ah lead-acid battery, all while being less than half the weight.
Can I use a regular car battery for my kayak trolling motor?
I strongly advise against it. Car starting batteries are designed to deliver a massive burst of power for a short time, not the slow, steady discharge a trolling motor requires. Using one will lead to a very short runtime and will quickly destroy the battery. You need a deep-cycle battery, which is built to be discharged and recharged repeatedly. Marine deep-cycle batteries are the traditional choice, but for a kayak, a LiFePO4 deep-cycle is the superior modern alternative.
How should I store my kayak battery during the off-season?
Proper storage is key to a long battery life. For all types, store them in a cool, dry place. The big difference is in the charge level. For lead-acid and AGM batteries, you should fully charge them before storage and then put them on a maintenance charger (or “trickle” charger) to prevent sulfation. For lithium batteries, it’s actually better to store them at around a 50-60% charge state. You do not need to keep them on a trickle charger; just check the charge level every few months and give it a top-up if it drops significantly.
Do I need a special charger for a lithium battery?
Yes, absolutely. This is one of the most important rules. Lithium batteries require a charger specifically designed for their chemistry, often labeled as a “LiFePO4 charger.” Using a charger meant for lead-acid batteries will not properly charge a lithium battery and can be dangerous, potentially causing a fire. The correct charger ensures the battery is charged efficiently and safely, following the precise voltage requirements.
Is the high cost of a lithium battery really worth it for a kayak angler?
From my experience, if you fish regularly, the answer is a resounding yes. The initial sting of the price fades when you consider the benefits: drastically reduced weight for easier kayak handling, consistent power output all day, the ability to use almost the entire capacity, and a lifespan that is 5-10 times longer than a lead-acid battery. When you factor in not having to replace a lead-acid battery every two years, the total cost of ownership often makes lithium the more economical choice over time, not to mention the performance upgrade.