Dakota Lithium DL+ 12V 640Ah Dual Purpose LiFePO4 Battery

DL+ 12V 640Ah Lithium Battery with Internal Heating, CAN Bus, 1,000 CCA, and Marine-Grade IP65 Enclosure

When your power system has real loads to support, you need more than a battery that looks impressive on paper. You need serious capacity, stable output, cold-weather charging support, and the kind of protection that lets you trust the system when it is powering something important. That is exactly what the DL+ 12V 640Ah lithium battery is built to deliver.

Designed for high-capacity energy storage and engine starting in marine, RV, off-grid, and commercial applications, this Lithium Iron Phosphate battery combines massive stored energy with dual-purpose functionality in one battery. With 640Ah of capacity at 12.8V, it delivers 7680Wh of energy, giving you the kind of runtime and system support that can replace multiple AGM or lead-acid batteries in a single unit.

This is the kind of battery people choose when they are done piecing together oversized battery banks, fighting voltage drop, or losing valuable space and payload to heavy legacy batteries. Whether you are powering air conditioning on a boat, building a serious RV energy system, supporting off-grid loads, or simplifying a commercial installation, the DL+ 640Ah gives you substantial capacity, engine-starting capability, and long-term lithium performance in one platform.

High-capacity power for serious systems

A lot of batteries are built for moderate use. This one is built for systems that actually have something to carry.

With 640Ah of capacity and 7680Wh of stored energy, the DL+ 12V 640Ah is designed for demanding applications where runtime matters and electrical loads are not small. It is built to support substantial power needs across marine systems, RV house power, off-grid installations, and commercial energy applications where multiple batteries would otherwise be required.

That kind of capacity can simplify system design in a big way. Instead of stacking multiple smaller batteries to reach the storage you need, this battery gives you a high-capacity solution in a single unit, helping reduce wiring complexity, free up installation space, and cut overall system weight compared to traditional lead-acid banks.

Deep cycle storage and engine starting in one battery

One of the biggest advantages of this battery is that it is built to handle both energy storage and engine starting.

In addition to its deep cycle capacity, the DL+ 640Ah is rated at 1,000 cold cranking amps for engine starting applications. That makes it a strong fit for boats and large vehicles that need dependable starting power along with the ability to run onboard electronics, house loads, accessories, and other power-hungry systems.

That dual-purpose capability is a major advantage for customers trying to simplify a complex setup. Instead of separating starting and house batteries into a more complicated bank, this battery gives you a more consolidated solution with the capacity to support both roles.

Stable lithium output for demanding electrical loads

Capacity is only part of the story. How the battery behaves under load matters just as much.

Built with LiFePO4 chemistry, this battery delivers the flat voltage curve and consistent power output customers expect from a serious lithium upgrade. That means better support for demanding electrical loads such as air conditioning systems, onboard electronics, inverters, and off-grid equipment that do not respond well to the voltage sag common in older battery technologies.

For customers, that means a system that feels more dependable in real use. Loads run more consistently. Power delivery stays more stable. The system performs more like it should, instead of feeling like it is fading as the battery discharges.

Built for cold-weather charging

Cold temperatures are where many battery systems start showing their limits. The DL+ 640Ah is designed to handle that better.

This battery includes integrated internal heating, allowing charging support in low-temperature conditions where standard lithium batteries may be limited or unable to charge safely. That added heating function helps make the battery more practical for year-round use in colder climates, unheated storage areas, cabins, boats, garages, and other installations where temperatures can dip below freezing.

For customers who have dealt with winter charging restrictions before, this is one of those features that quickly goes from nice to have to essential.

Smart protection built in with advanced control features

A battery of this size needs more than raw capacity. It needs intelligent protection and control behind the scenes.

The DL+ 640Ah includes a built-in Battery Management System designed to help protect the battery and support operational stability. It manages critical functions like battery protection and performance control so the system can operate more safely under demanding real-world conditions.

This model also includes external on/off control of battery terminals through the data port, with independent charge and discharge shut-off capability. That adds another level of system control for advanced users, installers, and integrated applications where battery behavior needs to be managed more precisely.

CAN Bus communication for better system integration

Compatibility matters more as systems get larger and more sophisticated.

This battery includes a CAN bus communication port with a 9-pin CAN plug and hardware included, helping it integrate with compatible electronics and system controls. For customers building advanced marine, RV, commercial, or off-grid systems, that communication support can make installation and system coordination much smoother.

It is the kind of feature that matters most to people building serious systems, and that is exactly who this battery is built for.

Marine-grade enclosure built for real environments

Power systems do not always live in ideal conditions, especially in marine and mobile applications.

The DL+ 640Ah is housed in a marine-grade enclosure with an IP65 water-resistance rating. That gives it strong protection for demanding environments where moisture, dust, and rough conditions are part of the job. It is important to note that IP65 means water-resistant, not submersible, but it is still a meaningful level of protection for real-world use in boats, RVs, commercial equipment, and protected outdoor installations.

That rugged construction adds confidence in the kinds of environments where ordinary batteries tend to become a liability.

Scalable for larger energy storage systems

A battery like this is already substantial, but some applications need even more.

The DL+ 640Ah supports parallel connection for increased capacity, allowing users to scale the system as storage needs grow. That makes it a strong fit for customers who want to start with a powerful foundation now and expand later for larger residential, commercial, marine, or mobile energy systems.

That flexibility matters when you are designing around future demand rather than just today’s minimum.

Long cycle life and long-term value

Big batteries need to deliver more than a big day-one number. They need to keep performing over time.

This battery is rated for up to 5,000 cycles to 80% capacity in recommended conditions, with continued usable service life beyond that. That is one of the biggest reasons LiFePO4 has become the preferred chemistry for serious energy storage. Instead of replacing heavy lead-acid banks again and again, you get a battery built for long-term use and long-term value.

Pair that with an 11-year manufacturer defect warranty, and the result is a product designed for customers making a major investment in reliable power.

Why customers choose the DL+ 12V 640Ah

Customers looking at this battery are usually solving a real problem. They need more storage. More reliable output. More room for heavy loads. Less weight than a comparable lead-acid bank. Fewer batteries. Less clutter. Fewer weak links in the system.

The DL+ 12V 640Ah stands out because it combines the features that actually matter in real-world use:

• 640Ah of high-capacity lithium storage
• 7680Wh of energy for demanding systems
• 1,000 CCA engine-starting capability
• LiFePO4 chemistry for stable output and long service life
• Internal heating for low-temperature charging support
• Built-in BMS for protection and operational stability
• CAN bus communication for compatible system integration
• Marine-grade IP65 enclosure for harsh environments
• Parallel support for expanded storage capacity
• Up to 5,000-cycle life in recommended conditions
• 11-year manufacturer defect warranty

Ideal for

The DL+ 12V 640Ah lithium battery is a strong fit for:

• marine house power and engine-starting systems
• large RV battery banks
• off-grid solar and storage systems
• commercial mobile power systems
• applications running heavy onboard loads like air conditioning and electronics
• users replacing multiple AGM or lead-acid batteries with a single high-capacity lithium unit

If you only need a small battery for light occasional use, this is far more battery than necessary. But if you are building a serious power system and want high-capacity storage, strong engine-starting support, lithium efficiency, and better system integration, this is the kind of battery that makes sense.

It is built for people who need a lot of power and do not want to keep compromising to get it.

Specifications

Capacity: 640Ah
Voltage: 12.8V
Energy: 7680Wh
Chemistry: LiFePO4
Cold Cranking Amps: 1,000 CCA
Max Continuous Discharge: 300A
Max Pulse Discharge: 600A for 20 seconds
Max CCA Pulse: 900A for 5 seconds
Standard Charge Current: 100A
Max Charge Current: 300A for 60 seconds
Operating Temperature: -20°F to 150°F
Cold Charging Support: Internal heating supports charging below 32°F
Size: 27 x 8.07 x 10.43 inches
Metric Dimensions: 686 x 205 x 265 mm
Height with Wheels: 330 mm
Weight: 121 lbs
Terminals: M10 terminals with marine and automotive-grade terminal covers
Water Resistance: IP65, not submersible
Communication: CAN bus port with 9-pin CAN plug and hardware included
External Control: Independent charge and discharge shut-off through external data port
Recommended Charger: 12V 50A charger, 14.4V charging voltage
Cycle Life: Up to 5,000 cycles to 80% capacity
Certifications: UL1642, IEC62133, UN 38.3
Quality Standard: ISO 9001:2015 certified
Warranty: 11-year manufacturer defect warranty

Product Summary

The DL+ 12V 640Ah lithium battery is a high-capacity LiFePO4 power solution built for marine, RV, off-grid, and commercial systems that need serious stored energy and dependable engine-starting capability in one battery. With 640Ah of capacity, 7680Wh of energy, 1,000 CCA, internal heating for cold-weather charging, CAN bus communication, built-in BMS protection, and a rugged marine-grade IP65 enclosure, it is designed to handle demanding electrical loads with fewer compromises than traditional battery banks. Add in parallel scalability, up to 5,000 cycles of service life, and an 11-year warranty, and you get a battery built for long-term confidence, not short-term convenience.