Dakota Lithium Marine 4 Bank, 40-amp (10-amp Per Bank) 12v Onboard Lithium Battery Charger

ULTRA FAST CHARGING FOR 12 VOLT DAKOTA LITHIUM BATTERIES

• 200% TWICE THE POWER OF TRADITIONAL BATTERIES
• 5X CHARGES 5 X FASTER
• 4X LASTS 4 X AS LONG
• 1/2 HALF THE WEIGHT
• 100% SAFE & RELIABLE

Built for rugged reliability on and off the water, the Marine 4 is an onboard marine battery charger engineered exclusively for lithium batteries. With 4 channels/banks charging at 10 amps per channel/bank you can rapidly charge up to 4 Dakota Lithium batteries or any 12-volt lithium batteries, including marine, boat, starter, and deep-cycle batteries. This onboard charger is recommended for golf carts, trolling motors, RVs, or any battery bank where multiple 12V batteries are wired in series or parallel. By charging each battery independently this charger ensures your battery bank is balanced and fully charged every time — providing you with maximum performance and increased battery lifespan. Plus the ease of a waterproof charger installed onboard your vehicle saves you time and hassle every time you charge, giving you more time to do what you love. Designed for water this charger is double sealed, with a fully-sealed and waterproof onboard battery charger enclosed in a rugged and shock proof aluminum case with an ingress protection rating of IP67 for use in the coldest and wettest environments. Built for an extended lifespan this charger uses passive cooling to replace charger fans that commonly break with 4 aluminum fins that dissipate heat while providing enhanced shock proof and structural durability. Built for you. Built North Dakota tough.

Suitable for:

• MARINE ONBOARD CHARGER
• CHARGING MULTIPLE 12V BATTERIES
• CHARGING ANY LITHIUM BATTERY
• OPTIMAL FOR BATTERIES MORE THAN 20 AMP HOURS
• ONBOARD CHARGER INSTALLED ON A BOAT, RV OR GOLF CART
• LIFEPO4 COMPATIBLE CHARGER
• LITHIUM TITINATE OXIDE (LTO) BATTERY CHARGER
• CHARGING SINGLE 24V + 2 X 12V BATTERIES
• CHARGING SINGLE 36V + SINGLE 12V BATTERIES
• CHARGING 48V BATTERIES
• CHARGING GOLF CART BATTERIES

Twice the Power?

Yes! Here at Dakota Lithium we build all of our batteries with lithium iron phosphate technology which has many distinct advantages over traditional batteries. Including 60% less weight, a charging speed that is up to 5X faster, and a significantly longer lifespan (5-10 years longer on average). One of the most noticeable advantages however is the flat voltage curve. Unlike a lead acid battery where the voltage drops as you use the battery a Dakota Lithium battery has a steady voltage for 99% of the battery's charge. That means you get all the power down to the last drop and double the usable power of traditional batteries.

Are Lithium Batteries Safe?

Dakota Lithium batteries are 100% safe & reliable. Our signature chemistry, Lithium Iron Phosphate (LiFePO4), does not contain rare earth elements (like Cobalt) or heavy metals, is non-toxic, including no lead or acid, is non-corrosive, does not off gas, requires no watering or maintenance, can be placed in any orientation, and unlike other lithium batteries will not explode or catch fire. In addition, each Dakota Lithium battery is protected from over heating, over charging, and short circuiting, by a battery management system (BMS) microchip that also extends the lifespan and is contained in a rugged, waterproof case (although enough water can conduct electricity between the terminals, so don't submerse the battery). For best performance & reliability we recommend using a LiFePO4 charger.

How do I charge a lithium battery?

Dakota Lithium batteries perform best when charged by a lithium compatible charger. Lead acid or SLA chargers, on-board chargers for AGM batteries, or other non-lithium chargers will charge a Dakota Lithium battery but only to 70-80% of capacity. This is because Dakota Lithium iron phosphate (LiFePO4) technology charges and is full at a higher voltage then traditional batteries (Dakota Lithium charges at 14.4 Volts). Chargers with a lithium battery setting or designed for lithium will charge at the appropriate voltage. See our full catalog of LiFePO4 battery chargers here. All batteries 54Ah and larger include a free LiFePO4 compatible charger. For troubleshooting tips download the Dakota Lithium battery user manual here.

Will cold weather affect my battery?

Your Dakota Lithium battery will discharge normally between a range of -20F and 120F (-29C to 49C). DL batteries are commonly used among ice fishers for their flashers and ice augers, so they are quite resilient and are frequently used in cold climates. In cases of extreme cold however, it is recommended that the batteries be insulated. We also do not recommend charging our batteries below freezing temperatures. If you are planning to regularly charge your battery below freezing temperatures we recommend the DL+ 12V 135Ah battery which has an internal heating element and is optimal for use in cars, trucks, RVs, off grid solar, and any application where the battery will be charged regularly in extremely cold environments (like a North Dakota winter).

Can I use this to start my car/boat engine?

Our DL+ line of batteries have 1000cca of engine starting power plus the same legendary deep cycle capabilities of all Dakota Lithium batteries. That means you can use them for starting a boat, car or truck engine. Our standard deep cycle batteries do not have this cold cranking ability and can not be used for a starting battery.

What Trolling Motor Battery Do You Recommend?

Dakota Lithium is a proud sponsor of over 200+ professional athletes in the fishing industry. Here's batteries sizes recommended by our pros depending on the size of your trolling motor: Motor Thrust / Max Amp Draw (A) @ Voltage (V) / Recommended Battery 20 lbs / 20A @ 12V / DL 54 or DL+ 60 25 lbs / 25A @ 12V / DL 54 or DL+ 60 30 lb / 30A @ 12V / DL 54 or DL+ 60 or DL 100 45 lb / 42A @ 12V / DL 54 or DL+ 60 or DL 100 55 lb / 50A @ 12V / DL 54 or DL+ 60 or DL 100 70 lb / 42A @ 24V / 24V Single or DL 54 x 2 or DL+ 60 x 2 or DL 100 x 2 80 lb / 56A @ 24V / DL+ 60 x 2 or DL 100 x 2 or DL 200 x 2 101 lb / 46A @ 36V / 36V Single or DL+ 60 x 3 DL 100 x 3 or DL 200 x 3 112 lb / 52A @ 36V / 36V Single or DL+ 60 x 3 or DL 100 x 3 or DL 200 x 3 >112 lb / Up to 100A @ 36V / DL+ 60 x 3 or DL 100 x 3 or DL 200 x 3 For wiring multiple batteries in series we recommend Connect Ease trolling motor connection kits available on our trolling motor battery page. For a deep dive on trolling motor batteries read How to Choose A Lithium Battery for Trolling Motors

What battery do I need for my RV or Camper Van?

The industry standard house battery size used in most RVs, Campers, and #VanLife builds is the DL 100Ah battery. This is a drop in replacement for AGM and most lead acid batteries. If you are charging off your engine's alternator we recommend a Victron DC-DC smart charger. If charging off solar panels we recommend a Victron Smart Solar charge controller, or if you have a solar charge controller choose the lithium setting. A handy size chart for number of batteries needed by size of RV is available here.

Dakota Lithium MARINE 4 BANK, 40-AMP (10-AMP PER BANK) 12V ONBOARD LITHIUM BATTERY CHARGER

Specifications	Unit
FOR 12 VOLT LITHIUM BATTERIES	We highly reccomend you use a LiFePO4 compatible charger. 12v chargers for lead acid batteries may work, but will decrease performance and lifespan of the battery.
FREE ADAPTER KIT FOR 24V, 36V AND 48V BATTERIES	Easy charge 24V, 36V, or 48V single batteries or a bank of 12V + 24V or 36V batteries.
CHARGER RATING	INPUT 100-120VAC, 50/60HZ. OUTPUT: 14.4 volts, 40.0 amps, 10 amps per bank / channel
TERMINAL CONNECTIONS	SAE connections make it easy to connect your charger to the battery. Install the ring terminals using the bolts on your terminals. Bolt black to your black terminal. Red to your red terminal. Do not short circuit. Then connect the charger via the SAE plug when you need to charge. Red light on the charger will turn on when charging. Light turns green when the battery is full.
SMART BMS COMMUNICATION	Charger will restart or "wake up" a Dakota Lithium BMS that has turned off a battery due to short circuit or excessive amp draw. Simply connect the charger to the battery to initiate a restart.
HOW FAST WILL MY BATTERY CHARGE?	Charges at a rate of 10 amps per battery (4 batteries supported). To determine your charging speed take the amp hour rating of your battery and divide by 10. For example, a 54 amp hour battery (Ah) would charge in 5.4 hours.
CAN I CHARGE MY BATTERY FASTER?	For most applications a charging time of 3 - 10 hours provides the longest lifespan for your battery. But if you have an application where you need rapid charging Dakota Lithium batteries can be safely charged in up to 1 hour (at a rate of 1C). For example, you could use a 20 amp charger with a 23 Ah battery for a 1 hour charge time. Charging at a 1 hour rate does reduce the lifespan over time. In our laboratory testing we found that the longest lifespan for Dakota Lithium batteries was at a charging speed of 0.3C or less (we recommend that the charger amp rating is 1/3 or less of the battery amp hour rating for longest lifespan).
WHAT VOLTAGE SHOULD LIFEPO4 BATTERIES BE CHARGED AT?	14.4 volts is recommended for Dakota Lithium (LiFePO4) batteries. This charger charges at 14.4 volts.
WATERPROOF	Built for marine use. IP 67. Internal components are sealed in a waterproof putty that makes it impossible for water to short circuit the charger. Wiring is SAE waterproof plugs.
RUGGEDIZED FOR EXTENDED LIFESPAN

12V BATTERY CHARGER

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