Choosing the Best Trolling Motor Battery: A Comprehensive Guide

2025-08-27 | Calvin

When you’re out fishing, the last thing you want is your trolling motor losing power in the middle of the water. The battery is the heart of your motor system—it keeps you moving smoothly, whether you’re gliding through calm lakes or battling strong currents.

But with so many options on the market, choosing the right trolling motor battery can feel overwhelming. Don’t worry—we’ve got you covered. In this guide, we’ll explain the different types of trolling motor batteries, key factors to consider before buying, and why lithium batteries (LiFePO4) are becoming the go-to choice for serious anglers.

Table of Contents

• Types of Trolling Motor Batteries
• What is the Best Type of Battery for Trolling Motors?
• Key Considerations When Buying Trolling Motor Batteries
• FAQs on Trolling Motor Batteries
• Conclusion

Types of Trolling Motor Batteries

There are three main types of batteries commonly used for trolling motors: Flooded Lead-Acid, AGM, and LiFePO4 (Lithium Iron Phosphate).

1. Flooded Lead-Acid Battery

Flooded lead-acid batteries are the most affordable and traditional option. While budget-friendly, they require regular maintenance, such as topping off water levels. They are heavier, bulkier, and less efficient in cold conditions, which limits performance over time.

Pros: Low cost, widely available
Cons: Heavy, high maintenance, shorter lifespan

2. AGM (Absorbent Glass Mat) Battery

AGM batteries are sealed, spill-proof, and more efficient than flooded lead-acid. They perform better in cold weather, resist vibration, and typically last longer.

Pros: Low maintenance, durable, good cold-weather performance
Cons: Heavier than lithium, shorter lifespan than LiFePO4

3. LiFePO4 (Lithium Iron Phosphate) Battery

LiFePO4 batteries represent the latest technology in marine power. They are lightweight, deliver consistent power, charge quickly, and have a much longer lifespan compared to lead-acid batteries. Although the upfront cost is higher, they provide the best long-term value.

Pros: Lightweight, fast charging, long lifespan, maintenance-free
Cons: Higher initial investment

What is the Best Type of Battery for an Electric Trolling Motor?

For most anglers, LiFePO4 batteries are the best choice. They are lighter, last significantly longer, and require almost no maintenance. While more expensive upfront, the long-term cost savings and performance advantages make lithium batteries the superior option for electric trolling motors.

Key Considerations When Buying Trolling Motor Batteries

When selecting the right battery, keep the following factors in mind:

1. Capacity and Power Output

Make sure your battery has enough capacity to match your motor’s needs. For instance, a 100Ah battery can run a 55lb thrust trolling motor for about 2 hours at full speed.

2. Size and Weight

Choose a compact, lightweight option that fits your boat. For kayaks and small boats, lighter batteries improve performance and efficiency.

3. Voltage

Always match the battery voltage to your motor system:

• 12V: For motors up to 70 lbs thrust
• 24V: For motors with 70–100 lbs thrust
• 36V: For large motors over 100 lbs thrust

4. Battery Type

While lead-acid and AGM are cheaper, LiFePO4 batteries offer the best balance of durability, weight, and long-term savings.

5. Durability and Protection

Look for a battery with a built-in Battery Management System (BMS) to protect against overcharging, overheating, and short circuits. Marine-grade protection against water and corrosion is also a must.

FAQs on Trolling Motor Batteries

Q: How long does a trolling motor battery last?

• Lead-acid: 2–3 years with proper care
• AGM: 3–5 years
• LiFePO4: 8–10+ years

Q: How many hours will a 100Ah battery run a trolling motor?

It depends on thrust and speed, but typically around 2 hours at full power, or much longer at lower speeds.

Q: Can I use a car battery for my trolling motor?

No. Car batteries are designed for short bursts of power, not continuous deep-cycle use. Always choose a deep-cycle battery.

Conclusion

Choosing the right trolling motor battery ensures you’ll stay powered up and focused on what really matters—enjoying your time on the water. While lead-acid and AGM batteries remain options, LiFePO4 batteries stand out as the best long-term investment for anglers seeking performance, reliability, and peace of mind.

👉 Ready to upgrade your trolling motor battery? Explore our selection of high-performance LiFePO4 batteries designed for marine use and experience worry-free fishing every time you hit the water.