Deep Cycle Lithium Marine Batteries

Want more time on the water and less time worrying about your battery? A deep cycle lithium marine battery gives you twice the runtime, way less weight, and zero maintenance compared to old-school lead-acid batteries.

These lithium batteries are built for trolling motors and marine electronics that need steady, reliable power. They're safer, charge faster, and hold voltage longer - so you can fish harder, go farther, and stay powered all day.

We carry trusted LiFePO4 batteries from Lithium Battery Company and Dakota Lithium - available in 12V, 24V, and 36V options to match your exact setup. 

Our Top Deep Cycle Lithium Marine Batteries

When you're cruising a lake or chasing big catches all day, these lithium batteries give you the power to stay out longer and go farther. That too, with no bulk or maintenance getting in the way.

LBC2450M - 24V 50Ah Lithium Trolling Motor Battery

This 24V powerhouse is perfect for anglers who want serious performance without the extra weight. The LBC2450M delivers long runtimes and strong, steady power for mid-range trolling motors. It’s designed for safe operation and extreme durability in the water and built with rugged LiFePO4 cells and a built-in smart BMS.

LBC3650M - 36V 50Ah Lithium Trolling Motor Battery

Running a high-thrust 36V setup? The LBC3650M gives you the capacity and reliability to power through full tournament days with ease. It’s part of LBC’s Don't Die Series, engineered for peak performance, fast charging, and zero maintenance - even in harsh marine environments.

Dakota Lithium - 12V 100Ah LiFePO4 Battery

This 12V lithium battery is a favorite among boaters, kayakers, and RVers alike. The Dakota Lithium 100Ah delivers rock-solid performance in cold conditions and supports a wide range of marine electronics and small motors. It’s lightweight, long-lasting, and backed by trusted LiFePO4 engineering.

Why Upgrade to Lithium for Marine Use?

Still using heavy lead-acid or AGM batteries on the water? It might be time to switch. Lithium marine batteries offer major performance gains that make your trips easier, longer, and more reliable.

With lithium, you get twice the usable capacity, so you can run your trolling motor or electronics longer without worrying about voltage drops. They’re also up to 60% lighter, which means better boat handling and faster movement - especially if you’re hauling gear.

Thanks to a flat voltage curve, you get full, steady power from start to finish - no slow fade like lead-acid. There’s also zero maintenance required and no risk of sulfation, so you can charge and go without checking water levels.

Lithium batteries also last much longer, with 2,000 to 5,000+ cycles, and recharge faster with low self-discharge rates, so they’re always ready when you are.

What is LiFePO4 and Why Does It Matter?

LiFePO4 stands for Lithium Iron Phosphate, and it’s the safest, most stable lithium battery chemistry available today. Unlike older lithium-ion types, LiFePO4 won’t overheat or catch fire - so it’s a smarter choice for boats and marine environments.

It’s built to handle tough conditions like water exposure, vibration, and extreme temperatures. And that makes it perfect for trolling motors, electronics, and off-grid power on the water.

You’ll also get a longer lifespan and more energy packed into a smaller size. These batteries can last for thousands of charge cycles and still deliver reliable power.

Best of all? Every battery we carry - Dakota Lithium and both LBC models - uses LiFePO4 chemistry, so you’re getting maximum performance with built-in peace of mind.

Built-In Safety with Smart BMS

Every lithium battery we offer comes with a built-in Battery Management System (BMS). It’s like your battery’s onboard bodyguard. It automatically watches over your battery and protects it from things like overcharging, deep discharging, short circuits, or overheating.

The BMS also balances each cell inside the battery, making sure they all charge and discharge evenly. That means better performance, more efficiency, and a longer lifespan.

Whether you're out in the heat, dealing with splashes, or running power all day long, the BMS gives you peace of mind every time you hit the water. You stay safe, and your battery stays protected - no extra work required.

Perfect for Marine & Trolling Motor Applications

No matter what kind of setup you run, we’ve got a lithium battery that fits. These deep-cycle batteries are built for life on the water - from weekend fishing trips to full-day tournaments.

12V batteries are great for powering fish finders, GPS units, and small trolling motors. They’re also perfect for kayaks, canoes, and lightweight setups.

24V batteries are made for mid-size trolling motors and give you solid runtime without taking up too much space or weight.

36V batteries are best for high-thrust motors, large boats, or serious anglers who need all-day power and top performance.

All our lithium batteries are compatible with leading brands like Minn Kota and MotorGuide, and they work great on bass boats, skiffs, pontoons, and even RV/marine combo systems.

Charging & Usage Tips for Lithium Marine Batteries

Lithium batteries are easier to maintain than old-school options, but a few smart habits will help you get the most out of every charge. Here are some tips for marine batteries:

• Use a lithium-compatible smart charger
  Always charge with a smart charger made for LiFePO4 batteries. It ensures the right voltage, prevents overcharging, and helps your battery last longer.

• Avoid over-discharge
  Don’t run your battery until it’s completely dead. The built-in BMS will shut things down before damage happens, but recharging before that point keeps performance strong.

• Store at 50 - 70% when not in use
  If you’re storing your boat for the off-season, charge your battery halfway before putting it away. This helps protect battery health during long rest periods.

• Keep terminals clean and dry
  A quick wipe every now and then goes a long way. Clean terminals ensure solid connections and prevent corrosion in wet environments.

• No equalization or water checks needed
  Unlike lead-acid batteries, lithium doesn’t require topping off with water or running equalization charges. Just charge, use, and enjoy.

Why Buy from Impact Battery?

When you're investing in a lithium marine battery, you want to know you're getting the real deal - from a team that actually knows batteries. That’s where we come in.

We only stock trusted brands like Dakota Lithium and Lithium Battery Company, and every battery we carry includes advanced LiFePO4 chemistry and a built-in smart BMS for safety. No second-rate cells or generic labels - just premium performance you can count on.

Our inventory is always fresh, shipped directly from our warehouse, so you’re never stuck with old stock. And if you have questions, our team is here to help you choose the right battery for your setup - no guesswork, just honest advice.

Need one? Need five? We’ve got competitive pricing and bulk discounts for anglers, boaters, and pros who power up often. 

When it comes to reliable marine power, ImpactBattery.com has your back.

Questions We Get All the Time

Have any more questions? Here are some of the most commonly asked questions that we get asked all the time.

How long do lithium marine batteries last?

Most lithium marine batteries last anywhere from 2,000 to 5,000+ cycles, depending on how they’re used and maintained. That’s often 10+ years with regular use and proper charging.

Can I replace AGM with lithium in my boat?

Yes, you can! Just make sure your system supports the same voltage, and you’re using a lithium-compatible charger. You’ll also enjoy less weight, more power, and zero maintenance.

What size battery do I need for my trolling motor?

That depends on your motor’s voltage and how long you want to run it. A 12V motor pairs well with a 100Ah battery, while 24V and 36V motors need batteries with matching voltage and at least 50Ah for solid runtime.

Are LiFePO4 batteries safe near water?

Yes! LiFePO4 is one of the safest battery chemistries available. It doesn’t overheat, doesn’t leak, and every battery we carry has a built-in BMS for added protection in marine conditions.

Do I need a special charger for lithium batteries?

You’ll need a smart charger designed for LiFePO4 batteries. These chargers deliver the correct voltage and protect your battery during charging. They're easy to find - and totally worth it.

Ready to Upgrade Your Marine Power?

Making the switch to lithium marine batteries means more freedom, longer days on the water, and less weight dragging you down. With built-in safety features, zero maintenance, and serious performance gains, it's a smarter choice for any boat setup.

At ImpactBattery.com, we offer top-rated lithium batteries, expert advice, and fast, reliable shipping. Whether you're powering a kayak, pontoon, or full trolling system - we’ll help you find the perfect fit.

Shop now and experience marine power that works as hard as you do.