what kind of battery for trolling motor

3 min read 23-12-2024

Choosing the right battery for your trolling motor is crucial for a successful day on the water. A poorly chosen battery can leave you stranded, while the right one ensures reliable power throughout your fishing trip. This comprehensive guide will help you navigate the world of trolling motor batteries, explaining the different types and helping you select the best option for your needs.

Understanding Trolling Motor Battery Types

The most common types of batteries used for trolling motors are:

1. Flooded Lead-Acid (FLA) Batteries:

Pros: These are the most affordable option. They're readily available and easy to find replacement parts for.
Cons: They require regular maintenance (checking water levels and adding distilled water). They have a shorter lifespan than other battery types and are heavier. They also self-discharge more quickly.
Best for: Budget-conscious anglers who don't mind regular maintenance and are using a smaller trolling motor.

2. Absorbent Glass Mat (AGM) Batteries:

Pros: AGM batteries are spill-proof and require virtually no maintenance. They have a longer lifespan and a higher cycle life than FLA batteries. They can handle deeper discharges. They are also more resistant to vibration and shock.
Cons: More expensive than FLA batteries.
Best for: Anglers who prioritize convenience, longer lifespan, and performance. A great all-around choice for most trolling motor applications.

3. Gel Cell Batteries:

Pros: Similar to AGM batteries in terms of maintenance (low) and lifespan, gel cell batteries are even more resistant to vibration and shock. They're also very spill-proof.
Cons: Generally the most expensive option. Performance can be slightly affected in extremely cold temperatures.
Best for: Anglers who need the absolute best in durability, even in rough conditions.

4. Lithium-ion (LiFePO4) Batteries:

Pros: These are the lightest and most powerful batteries available. They boast a significantly longer lifespan and a much higher cycle life compared to lead-acid batteries. They charge faster and have a lower self-discharge rate.
Cons: The most expensive option. Requires a compatible charger.
Best for: Anglers who prioritize weight savings, extended runtime, and long-term cost savings (despite the higher upfront cost). Ideal for larger boats or those with high-demand trolling motors.

Choosing the Right Battery Size (Amp-Hours)

The amp-hour (Ah) rating of your battery indicates how much power it can store. A higher Ah rating means longer runtime. The size you need depends on several factors:

Trolling motor size: Larger motors require more power.
Usage: How many hours per day do you typically use your trolling motor?
Speed: Higher speeds use more power.
Water conditions: Rougher water or heavy currents demand more power.

Consult your trolling motor's manual for recommended amp-hour ratings. It's generally better to err on the side of a higher Ah rating to ensure sufficient runtime.

How Many Batteries Do You Need?

Many anglers opt for a dual-battery system for redundancy and extended runtime. This allows you to switch to a fresh battery if one runs low, or to run a larger trolling motor. A parallel wiring setup allows both batteries to power the motor simultaneously.

Maintaining Your Trolling Motor Battery

Proper battery maintenance extends their lifespan and ensures optimal performance. Follow these tips:

Keep terminals clean: Corrosion can reduce performance. Clean terminals regularly with a wire brush and baking soda solution.
Charge after each use: This prevents sulfation, which damages the battery.
Store properly: Store batteries in a cool, dry place when not in use.
Follow manufacturer's instructions: Each battery type has specific care instructions.

Frequently Asked Questions (FAQs)

What is the best battery for a trolling motor?

The "best" battery depends on your budget and needs. AGM batteries are a great all-around choice, offering a good balance of performance, lifespan, and cost. Lithium batteries are superior in many ways but come with a higher price tag.

How long will a trolling motor battery last?

This depends on the battery type, size, and usage. Expect several years from a well-maintained AGM or Lithium battery. FLA batteries generally have a shorter lifespan.

Can I use a car battery for a trolling motor?

While technically possible, it's not recommended. Car batteries are designed for short bursts of high power, not the sustained draw of a trolling motor. They also are not designed to handle deep discharge cycles, leading to a shorter lifespan.

By carefully considering your needs and reviewing the information above, you can choose the right trolling motor battery for your boat and enjoy countless hours of successful fishing trips. Remember to always consult your trolling motor's manual for specific recommendations and safety guidelines.