Boats are power hungry beasts and marine batteries are essential to your boat’s performance on the water. Batteries power your electronics, your navigation, and start your engine. Choose the right marine battery and make sure your boat runs smoothly and efficiently. Most boats have a compartment or battery tray to fit a specific size of marine battery called a group size. The group size of a battery refers to the physical dimensions. The length, the width, and the height. Here’s the Dakota Lithium guide to which lithium batteries fit what group sizes. To help you unleash your boat’s full potential. To help you #GoFurther. #PlayHarder. #LastLonger.
The Best Group 24 Marine Battery
A group 24 battery measures 10.2 inches in length, 6.8 inches in width, and 9.3 inches in height. Group 24 batteries are a compact and lightweight option that fit most any boat.
Most Powerful Group 24 Battery
The Dakota Lithium Plus 12V 135Ah battery is a drop in replacement for group 24 marine batteries but with 5X the usable power, 1/2 the weight, and 5X the lifespan of traditional batteries. Built as a dual purpose battery, the DL+ 135 has both 1,000 cold cranking amps of engine starting power PLUS 135 Amp Hours of deep cycle performance. This is the ultimate upgrade for any boat. The DL+ 135 is the battery used by Hank Cherry, Brock Mosely, and our Bassmaster tournament fishing pro staff. Official battery of Bassmaster and the battery of champions. Can be linked in series for 24V 36V and 48V trolling motors (read more about trolling motor batteries here). Backed up by an 11 year warranty.
Lightest Weight Group 24 Battery
The Dakota Lithium Plus 12V 60Ah battery is an ultralight replacement for group 24 marine batteries but with 2X the power, 1/4 the weight, and 5X the lifespan of traditional batteries. Like the DL+ 135 the DL+ 60 is a dual purpose battery with both 1,000 CCA of engine starting power plus 60 Amp Hours of deep cycle power. This is the top choice for kayak fishing, trolling motors, and starting smaller outboard motors. At 16.5 lbs the DL+ 60 is the lightest weight group 24 battery and is the top choice of our NASCAR racing team and our kayak fishing pro staff – two applications where weight and performance matter. Backed up by an 11 year warranty.
In the past group 24 marine batteries were found in smaller boats: kayaks, canoes, dinghies, inflatable boats, bass boats, and smaller fishing boats. But with Dakota Lithium’s innovation in energy density you can now get more power with a smaller battery that will fit most boats. For example, the DL+ 12V 135Ah battery has 2X the usable power of a 8D marine battery even though it is less than half the physical size and is a much smaller group 24 battery.
The Best Group 27 Marine Battery
A group 27 marine battery measures 11 inches in length, 7.3 inches in width, and 9.3 inches in height. It is slightly larger than a group 24 and is one of the most common AGM & marine battery sizes.
The Dakota Lithium 12V 100Ah battery is a more powerful and lightweight replacement for group 27 batteries. Built from lithium iron phosphate technology, the Dakota Lithium 12V 100Ah battery has twice the usable power and half the weight of a group 27 AGM or lead acid battery. The best part is it lasts 5X longer in terms of lifespan, providing exceptional lifetime value. Backed up by a best in class 11 year warranty. This is the original Dakota Lithium battery, battle tested over a decade of adventures in the most extreme of conditions.
If you are looking to cut weight, the ultimate replacement for a group 27 battery is the smaller and more powerful Dakota Lithium Plus 12V 135Ah battery. Even though it is technically a smaller size battery it is a drop in replacement for group 27, 31, or 8D since it has more usable power than even the largest AGM or lead acid marine batteries but in a much smaller case.
The Best Group 31 Marine Battery
A group 31 battery is slightly longer than a group 27. Measures 12.8 inches in length, 6.8 inches in width, and 9.3 inches in height. This is the most popular marine battery size for boats that are powering multiple electronics. It is also used widely in the RV industry as a house battery and for solar power.
The ultimate group 31 marine battery is the Dakota Lithium Plus 12V 280Ah battery. With over 6X the usable power of a traditional group 31 AGM battery, the DL+ 280 is the most energy dense battery available on the market, with 280 Amp Hours of Dakota Lithium energy inside a case designed to hold 100 Ah of lead acid energy. That means a single DL+ 280 can replace six AGM or lead acid batteries. This incredible energy density allows boats to replace gasoline generators with a smaller and more compact battery bank. It also allows boats to add power hungry upgrades like air conditioning, electric grills, or induction stove tops.
The best part is the DL+ 280 is a dual purpose battery with both 280 Ah of deep cycle performance PLUS 1,000 CCA of engine cranking power. This gives you the ability to have one battery to both start your engines and run your electronics.
The Best Group 34 Marine Battery
The Group 34 marine battery is a slightly longer version of the Group 31. It measures 13.5 inches in length, 6.8 inches in width, and 9.3 inches in height. The best lithium upgrade for a group 34 battery is the Dakota Lithium Plus 12V 280Ah battery. This is because of the exceptional energy density, with the power of six group 34 batteries inside a single Dakota Lithium battery.
The Best 8D Marine Battery
8D batteries are the largest marine batteries. They measure 20.75 in in length, 11.13 in in width, and 9.88 in in height. 8D batteries were developed to power large boats, commercial fishing vessels, and RVs and motorhomes. Dakota Lithium first launched an 8D lithium battery as the Dakota Lithium 12V 200Ah battery. With twice the usable power, and 1/2 the weight of an AGM battery, the DL 12V 200Ah became wildly popular for sprinter van builds, RVs, and boats. In 2023 Dakota Lithium launched the DL+ 12V 280Ah battery, which is 4X the usable power of a 8D lead acid battery in a case that is significantly smaller. This makes the DL+ 280 the ultimate upgrade with 4X the power, 1/3 the weight, and 5X the lifespan of a traditional 8D battery. Plus 1,000 cold cranking amps of engine starting power.