Marine Batteries
Your boat is your escape. Its marine battery is the heart of every adventure. Don't let a weak or unreliable power source cut your day short.
We've handpicked only the toughest, real-world-tested AGM and lithium marine batteries designed for long-lasting adventure on the water.
Whether you need explosive starting power to fire up your engine or the marathon energy of a deep-cycle marine battery for your trolling motor and electronics, we have the perfect solution.
We'll ship these powerhouses straight to your door or directly to the marina. Finding the right boat battery should be simple. Let's get you powered up and back on the water, worry-free.
Shop Our Marine Battery Collection
Ready to find the perfect battery? You can browse our collection based on what is most important to you. Jump straight to the right category below to find exactly what you need for your boat.
Popular Group Sizes for 12 Volt Marine Batteries
Think of battery group sizes like shoe sizes. It’s a simple system that tells you if the battery will fit in your boat's battery slot. No one wants a battery that’s too big or too small for the dedicated battery space.
Matching the group size to your boat’s battery tray is the most important first step. But the size also tells you a bit about its power. Usually, the bigger the boat batteries, the more energy they can hold.
Take the Group 31 Marine Battery, for instance. It’s a standard size that measures about 13 x 7 x 9 inches. A battery this big usually packs a strong punch, with 100 Amp Hours of power or more.
Trolling Motor Batteries
Sure, going to Wal-Mart every year to buy a trolling motor battery may work for some people. But not us. Buy a long-lasting dual purpose AGM marine battery or Don't Die series lithium battery instead!
Cranking Batteries
A marine cranking battery on a bass fishing boat has requirements that may not be needed on a luxury yacht. What attribute is needed for your boat?
House Boat Deep Cycle Batteries
Larger pleasure cruising boats rely on a marine deep cycle battery to power everything including the kitchen sink. These house batteries need to be different than cranking batteries to give you the result you demand!
AGM Marine Batteries
The Absorbed Glass Matt or AGM battery has been the go to staple for every type of marine application from house deep cycle batteries to engine crank batteries. The best innovation for this type of battery was the dual purpose AGM marine battery. It excells at both cranking and deep cycling.
Lithium Marine Batteries
As the lithium marine battery has become for reliable and less expensive the debate on whether lithium or AGM marine batteries are better could be tipping in a new direction. Discover what Impact Battery recommends.
Marine Battery Chargers
Bass boats, yachts and battery powered kayaks all require a different marine battery charger setup. Multi-bank and waterproof chargers are essential for bass boats, but a kayak could be charged in the garage with a regular single output 12-volt charger.
Understanding Marine Battery Types: Cranking vs. Deep Cycle vs. Dual Purpose
Now that you have seen our categories, let’s talk about what makes these batteries different. A marine-grade battery is not a one-size-fits-all product. Choosing the right type is the most important step in your search.
Marine Cranking Batteries for Reliable Starting Power
Think of a marine cranking battery like a sprinter. It is designed to give a huge burst of energy for a very short time. This is exactly what you need to get your engine started quickly and reliably.
These batteries are also called a marine starter battery. They use thinner internal plates. This design helps them release power fast. However, they are not good for powering your electronics for a long time. Using a cranking battery for your trolling motor will wear it out very quickly.
Deep Cycle Marine Batteries for Sustained Performance
A deep-cycle marine battery is the opposite of a cranking battery. Think of it as a marathon runner. It provides a steady, consistent stream of power for many hours. This makes it perfect for your electronics.
If you need to power trolling motors, fish finders, stereos, or lights, you need a marine deep-cycle battery. These batteries have thicker plates that can handle being drained and recharged over and over again. This is what we call a deep cycle, and it is what makes these deep cycle marine batteries last so long.
Dual-Purpose Marine Batteries: The Best of Both Worlds
What if you need a battery that can do both jobs? That is where a marine dual-purpose battery comes in. This type is a hybrid, blending the features of cranking and deep cycle batteries into one powerful package.
A dual purpose AGM marine battery is a very popular choice for smaller boats where you might not have space for two separate batteries. It gives you strong starting power to turn over the engine. At the same time, it can provide enough reserve power to run your electronics for a long while.
This versatility makes it a great all-around choice. It gives you confidence in your starting power and the ability to enjoy your onboard electronics.
Choosing the Right Technology: AGM vs. Lithium Batteries
After you decide on the battery type, the next step is to choose the technology. The two best options for boats today are AGM and Lithium. Both are much better and safer than an old lead acid marine battery.
The Proven Reliability of AGM Marine Batteries
The Absorbed Glass Mat, or AGM marine battery, is the workhorse of the boating world. It has been trusted for years because it is tough, reliable, and safe. These AGM marine batteries are completely sealed, so they will never leak acid.
This non-spillable design means you can mount them in almost any position. They are also maintenance-free. You never have to add water. Because they are built to handle heavy vibration, they are perfect for the harsh marine environment. An AGM is an excellent choice for both starting and deep-cycle needs.
The Lightweight Power of Lithium Marine Batteries
The lithium marine battery is the newest and most advanced option available. While marine battery prices for lithium can be higher upfront, they offer incredible benefits. The biggest advantage is their weight. They are often less than half the weight of an AGM battery.
This weight savings can make your boat faster and more fuel-efficient. Lithium batteries also last much longer, sometimes up to ten times the cycle life of other batteries. They also charge much faster.
Plus, they come with a built-in Battery Management System, or BMS. This smart system protects the battery from being overcharged or drained too far. This keeps it safe and makes them last even longer.
Key Specifications to Consider Before You Buy
Understanding a few technical details will help you find the best marine batteries for your needs. Do not worry, these terms are simple to understand.
Group Size
We mentioned group size earlier. It is just the physical size of the battery case. You need to make sure the battery you choose fits in the space your boat provides. Common sizes are Group 24, Group 27, and Group 31.
Voltage (V)
Voltage is the amount of electrical pressure the battery provides. Most boats use a marine battery 12v system. However, some larger trolling motors need more power and may require a 24-volt or 36-volt system, which you can create by linking multiple batteries together.
Amp Hours (Ah)
Think of Amp Hours as the size of your battery’s fuel tank. A higher Ah number means the battery holds more energy. If you run a lot of electronics or have a powerful trolling motor, you will want a battery with a higher amp-hour rating to get more runtime.
Cranking Amps (MCA/CCA)
These ratings tell you how powerful the battery is for starting an engine. Marine Cranking Amps (MCA) measure starting power in moderate temperatures. Cold Cranking Amps (CCA) measure their ability to start an engine in the cold. A higher number means more starting power, which is important for larger engines.
Reserve Capacity (RC)
Reserve Capacity is a safety rating. It tells you how many minutes a fully charged battery can run essential electronics if your boat's engine or alternator fails. A longer reserve capacity gives you more time to get back to shore safely.
Why Choose Impact Battery for Your Marine Batteries?
Now you know what to look for. When you are ready to explore marine batteries for sale, you want to buy from experts you can trust.
At Impact Battery, we provide power solutions. Our curated selection of AGM and lithium batteries helps you get a reliable, long-lasting product that won't let you down. We have tested these products, and we stand by their quality.
With expert support and direct shipping, we make it easy to find the perfect marine battery for your needs. Browse our selection today or contact our team for personalized advice. We are here to help you get the power you need for your adventures on the water.
