Choosing the right best lithium trolling motor battery is a decision that requires careful consideration. It’s not just about picking any battery off the shelf; it’s about understanding your specific needs, the capabilities of different battery types, and how they will interact with your trolling motor. In this comprehensive guide, we’ll delve into the nitty-gritty details you need to know to make an informed decision.
Types of Deep Cycle Batteries
Flooded Wet-Cell Batteries
- Pros: Affordable and widely available.
- Cons: Susceptible to spills and less efficient than other types.
Absorbent Glass Mat (AGM) Batteries
- Pros: Sealed design prevents spills and offers efficient power output.
- Cons: Slightly more expensive than wet-cell batteries.
Lithium-Iron-Phosphate Batteries
- Pros: Lightweight, highly efficient, and long-lasting.
- Cons: The most expensive option available.
Key Features to Consider
Reserve Capacity
The reserve capacity of a battery indicates how long it can run at a specific discharge rate. This is crucial for understanding how long your trolling motor can operate without draining the battery.
Cold Cranking Amps (CCA)
While not crucial for trolling motors, a higher CCA rating is beneficial in colder climates where starting the engine might require more power.
Amp-Hours (Ah)
The Ah rating gives you an idea of the battery’s storage capacity. Higher Ah means the battery can store more energy, providing longer run times for your trolling motor.
Top Picks and Recommendations
Optima OPT 8016
- Best Overall
- Reserve Capacity: 120 minutes
- Ah: 55
Bass Pro Shops AGM
- Best Deep Cycle
- Reserve Capacity: Not specified
- Ah: Not specified
Tracker Marine Super High Output
- Best Lithium
- Reserve Capacity: Not specified
- Ah: Not specified
Why a Deep Cycle Battery is a Must
Using a deep cycle battery for your trolling motor is not just a recommendation; it’s almost a necessity. Unlike regular batteries, deep cycle batteries are designed to be discharged and recharged frequently. They provide a steady amount of current over an extended period, making them ideal for trolling motors that require consistent power output.
How Long Will a Deep Cycle Battery Run a Trolling Motor?
Factors Affecting Battery Longevity
The duration a deep cycle battery can power a trolling motor is influenced by several factors:
- Battery Capacity: Measured in Amp-Hours (Ah), a higher capacity means longer run time.
- Motor’s Power Consumption: Measured in watts, higher consumption will drain the battery faster.
- Usage: The speed and duration of trolling also impact battery life.
On average, a high-quality deep cycle battery can last anywhere from 6 to 12 hours, depending on these factors.
What Size Battery is Good for a Trolling Motor?
Size Matters, But How Much?
The size of the battery you need is determined by several factors:
- Trolling Motor Thrust: Measured in pounds, higher thrust requires a more powerful battery.
- Boat Size: Larger boats may require multiple batteries or batteries with higher capacity.
- Space: Always opt for the largest battery that can safely fit in your boat to offer more reserve capacity.
