Marine Boats

Deep Cycle Marine Battery

WattCycle offers highest quality lithium marine batteries for marine enthusiasts.Our LiFePO4 marine battery technology ensures reliable power and long-lasting performance, keeping your equipment running smoothly on every adventure. Built for durability and efficiency, our lithium batteries for boats let you stay on the water longer.

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WattCycle Lithium Marine Batteries

WattCycle offers a wide range of lithium marine batteries to suit different boating needs:

Why Choose WattCycle Deep Cycle Marine Battery?

Longer Battery Lifespan

Built to outlast traditional marine batteries, WattCycle offers more charge cycles and reduced replacement costs. Our batteries are a long-term investment for boat owners seeking extended performance.

Durability in Tough Conditions

WattCycle's deep cycle marine battery is designed to handle the toughest marine environments. From saltwater exposure to constant vibrations, our batteries deliver long-term reliability, ensuring your equipment stays powered in any situation

Real-Time Bluetooth Monitoring

Stay in control with WattCycle’s Bluetooth-enabled monitoring system. Track your battery’s status anytime, anywhere, using our mobile app, providing you with peace of mind on every journey.

Lightweight & Efficient Performance

WattCycle’s lightweight lithium deep cycle marine battery improves boat efficiency and handling by reducing overall weight, resulting in better fuel economy and smoother operation on the water.

Learn More about Lithium Marine Battery Types

When purchasing a lithium marine battery, it's important to understand the different types and their functions, so you can choose the best deep cycle marine battery for your boating needs.

Lithium Marine Starting Battery (Cranking Battery)

This battery provides the quick surge of energy needed to start your boat’s engine. Designed for reliability, it ensures your engine starts smoothly, even in challenging conditions.

Lithium Deep Cycle Marine Battery

This battery is designed for steady, long-term energy delivery, making it perfect for powering trolling motors, fish finders, GPS systems, audio system and other electronics. It can be discharged and recharged multiple times, providing reliable, long-lasting power for extended boating trips.

Dual Purpose Lithium Marine Battery

Ideal for boats with limited space, this battery is capable of both starting the engine and powering onboard systems. While it may not offer the same cranking power or longevity as dedicated batteries, it’s a practical solution when space is at a premium.

Choosing the Best Deep Cycle Marine Battery for Your Boat

Selecting the best marine lithium battery depends on your boat’s size, power requirements, and how you use it. For smaller boats, our 12v deep cycle marine battery is a popular choice, delivering ample power in a compact design. For larger vessels or boats with more demanding power needs, our higher-capacity options ensure you stay powered up for longer trips.

What is a Deep Cycle Marine Battery

What is a Deep Cycle Marine Battery?

A deep cycle marine battery is engineered to provide consistent, long-lasting power over extended periods. Unlike starting batteries that deliver short bursts of high energy, a deep cycle marine battery is designed for slow, steady energy release, making it ideal for powering trolling motors, navigation systems, and onboard electronics. These batteries can withstand deep discharges and repeated recharges without degrading quickly, offering exceptional longevity.

Are Marine Batteries Deep Cycle?

Many marine batteries are designed as deep cycle batteries due to their ability to handle prolonged energy usage. While there are other types of batteries used for specific applications, the best deep cycle marine battery is essential for boaters who need reliable power over extended periods.

AGM Deep Cycle Marine Battery vs. Lithium Deep Cycle Marine Battery

When choosing between AGM deep cycle marine batteries and lithium deep cycle marine batteries, it's important to consider each option's performance, durability, and long-term value.

AGM Deep Cycle Marine Battery: AGM batteries are known for being maintenance-free and durable, making them a popular choice in marine environments. However, they tend to be heavier and have a shorter lifespan compared to lithium batteries. With a limited depth of discharge (DOD) of around 50%, AGM batteries require more frequent charging, reducing their overall efficiency over time.

Lithium Deep Cycle Marine Battery: In contrast, lithium deep cycle marine batteries offer numerous advantages. They are significantly lighter, last much longer, and can be discharged up to 90% or more without any negative impact. This deeper DOD allows for more usable energy per charge. WattCycle’s lithium batteries come equipped with Bluetooth technology, giving you real-time insights into your battery’s charge status, so you can monitor performance with ease. These batteries recharge faster and require minimal maintenance, making them ideal for boaters seeking reliable, long-term power.

While AGM batteries may seem more cost-effective upfront, the superior longevity, efficiency, and added features like Bluetooth monitoring in WattCycle’s lithium deep cycle marine batteries make them a smarter investment for those seeking top-notch performance on the water.

WattCycle's RV Marine Battery

Many people choose WattCycle's deep cycle marine battery for their RV marine battery needs due to its versatility in both marine and RV applications. For marine RV enthusiasts who love the ocean and long for the freedom of riding the waves, a stable, reliable, and long-lasting battery is an essential companion. We understand that every voyage at sea presents unknowns and challenges, which is why we've specifically designed our high-performance marine RV deep cycle battery for offshore RV adventures.

Embark on your ocean exploration journey with confidence! WattCycle's deep cycle RV marine battery ensures that every trip is powered with passion and reliability, turning the endless possibilities of the ocean into unforgettable moments in your life.

Should You Run a Marine Radio on a Deep Cycle Battery?

Sure, it's entirely feasible—and actually quite practical—to run a marine radio on a deep cycle marine battery. These batteries are specifically designed to provide consistent, steady power over extended periods, making them ideal for running electronics like marine radios, GPS systems, and fish finders. Unlike cranking batteries, which are built for short bursts of energy to start your engine, deep cycle batteries are designed for long-term use, supplying continuous power without draining too quickly.

How to Set Up Your Marine Radio with a Deep Cycle Battery

To power your marine radio using a deep cycle marine battery, simply connect the radio's power cables to the battery terminals, ensuring proper polarity. Most marine radios are designed to run on 12V power, making them fully compatible with a standard 12v deep cycle marine battery. Here’s how to set it up:

Choose the Right Battery: Select a lithium deep cycle marine battery for your setup. Lithium batteries, like the ones from WattCycle, offer longer run times, faster recharging, and are more durable than traditional AGM batteries. Additionally, they provide deeper discharge levels, allowing you to use more of the battery's capacity without causing damage.

Proper Wiring: Ensure your marine radio is properly wired to the battery using marine-grade wiring. This ensures reliable performance and reduces the risk of electrical issues. Most marine radios have straightforward installation guides, and connecting it to your deep cycle battery is no different than any other onboard system.

Use a Battery Monitor: Utilizing a battery monitor with Bluetooth (like the ones included in WattCycle’s lithium batteries) allows you to keep an eye on your battery levels in real time. This ensures you know exactly how much charge remains, helping you avoid any unexpected power loss during critical communication moments.

Dedicated Circuit: It's advisable to run the marine radio on a dedicated circuit, separating it from other power-hungry devices on your boat. This minimizes the risk of interference and ensures consistent, reliable communication, even during long trips.

Benefits of Running a Marine Radio on a Deep Cycle Battery

Extended Use: A deep cycle marine battery provides consistent power for long durations, which is critical for keeping your marine radio functional throughout your entire journey. You won't have to worry about your battery depleting too quickly.

Safety: Staying connected is key for safety while on the water. Having a reliable power source like a lithium deep cycle marine battery ensures that your marine radio is always operational, enabling you to communicate in emergencies.

Power Efficiency: Since deep cycle batteries are designed to discharge slowly, they are incredibly efficient for running low-power devices like marine radios. You can leave the radio on for long periods without worrying about draining the battery unnecessarily.

Versatility: Besides the radio, the same deep cycle battery can simultaneously power other essential electronics, such as navigation systems, lights, and fish finders, making it a central part of your boat’s electrical system.

By running your marine radio on a deep cycle marine battery, you ensure a reliable, long-lasting power source that keeps you connected, enhances safety, and improves your overall boating experience.

Customer Experiences with WattCycle Marine Batteries

I replaced my old AGM battery with the WattCycle lithium battery, and the difference is night and day. It charges faster and lasts so much longer. I’ve taken it on several long fishing trips, and it hasn't let me down once.
Carlos G.

The performance of the WattCycle marine RV deep cycle battery is phenomenal. I love how it powers both my RV and boat without any issues. It’s super efficient, and the Bluetooth app lets me track the battery status while I’m on the road or at sea.
Jean-Paul L

Switching to WattCycle's lithium marine battery has made such a difference in how I enjoy my boat trips. The lightweight design and fast recharge mean I can go further without worrying about power. Plus, the Bluetooth monitoring helps me plan my day out on the water with confidence.
Sophie M.

I’ve been using the WattCycle lithium deep cycle marine battery for a year now, and I’m beyond impressed with its reliability. Whether I’m powering my trolling motor or running my electronics, the battery holds up, even on long trips. The Bluetooth feature is a game-changer, letting me check the charge anytime, which gives me peace of mind.
Lucas H.

Your Guide to Marine Batteries

1. What type of battery is a deep cycle marine battery?

A deep cycle marine battery is designed to provide continuous, steady power over long periods. Unlike starting batteries that deliver short bursts of energy to start an engine, deep cycle batteries are built to power electronics like trolling motors, fish finders, and marine radios over extended periods. They can be discharged and recharged multiple times, making them ideal for sustained energy usage.

2. How long do deep cycle marine batteries last?

The lifespan of a deep cycle marine battery can vary depending on factors like how often it's used, how it's charged, and the type of battery. On average, a well-maintained lithium deep cycle marine battery can last anywhere from 7 to 10 years, which is much longer than traditional AGM or lead-acid batteries that typically last around 3 to 5 years. Our WattCycle deep cycle marine battery is designed to last up to 10 years and has an impressive 15,000+ cycles at Depth of Discharge (DOD).

3. How do you charge a deep cycle marine battery?

To charge a deep cycle marine battery, you’ll need a deep cycle marine battery charger compatible with your battery type. Simply connect the charger to the battery terminals and follow the charger’s instructions. Lithium batteries, for instance, charge faster than AGM batteries and can usually reach a full charge within a few hours. It’s important to avoid overcharging and use a charger designed for your specific battery type to ensure optimal performance and longevity.

4. What is the difference between a starting battery and a deep cycle battery?

A starting battery is designed for short bursts of high energy to start the boat’s engine, whereas a deep cycle marine battery is made to deliver sustained power over long periods, ideal for running electronics, lights, and other onboard systems.

5. How often should I recharge my deep cycle marine battery?

You should recharge your deep cycle marine battery after each use to maintain its lifespan. For lithium batteries, it’s recommended to recharge them even if they haven’t been fully discharged, as they don’t suffer from memory issues like some other types of batteries.

6. Are deep cycle marine batteries maintenance-free?

Lithium deep cycle marine batteries, such as those from WattCycle, are virtually maintenance-free. They do not require regular water-level checks or cleaning, unlike traditional lead-acid or AGM batteries, making them hassle-free for most boaters.

7. Can I use a deep cycle marine battery for both starting and powering electronics?

Yes, you can use a dual-purpose lithium marine battery, which is designed to handle both engine starting and providing steady power to your boat's electronics. However, if space allows, it’s generally better to use separate batteries for starting and deep cycle purposes to maximize efficiency and lifespan.

8. Deep cycle battery or dual purpose battery which is good for your boat?

It depends on your needs. If you have space for two batteries, it’s best to use a deep cycle marine battery for powering electronics and a dedicated starting battery for engine cranking. However, if space is limited, a dual-purpose lithium marine battery can handle both tasks, though it may not offer the same level of performance as using two specialized batteries.

9. What is the best way to charge a deep cycle battery?

The best way to charge a deep cycle marine battery is to use a deep cycle marine battery charger designed for your specific battery type, such as lithium or AGM. Slow, steady charging is ideal for extending the battery’s lifespan. For lithium batteries, avoid using chargers designed for lead-acid or AGM batteries, as they may not charge the battery properly.

10. What happens if you charge a deep cycle battery with a regular battery charger?

Using a regular battery charger on a deep cycle marine battery may damage the battery. Regular chargers are typically designed for quick, high-voltage charging, which can cause overcharging, reduced lifespan, or even overheating in deep cycle batteries. Always use a charger specifically designed for deep cycle batteries to ensure safe and efficient charging.