12V 400AH Deep Cycle Lithium ion Battery


This top of the line 12v 400ah lithium ion battery comes with many perks that will always have you covered – no matter your location. Its long lifespan reduces the amount of replacement battery necessary over time and its high level of charge retention provides dependable service day in and day out.

SKU: B-12400 Category:


This high-capacity lithium-ion battery pack has an output voltage of 12V and a current capacity of 400Ah, it is the perfect solution for uninterrupted power supply. Being backed by a 250A BMS system, it provide you with reliable and consistent power supply. This means that it can be charged faster than other lithium-ion battery, making it suitable for applications where rapid charging is required. It ensures that the power output remains stable and does not fluctuate, even under high load conditions.

12v 400ah battery offers numerous selling points and advantages, including high energy density, long cycle life, safety, stability, fast charging, versatility, and environmental-friendliness.In addition, our 12V 400Ah lithium-ion battery weighs 39.12 kg, only 1/3 the weight of a lead-acid battery of the same capacity. Besides, our lithium battery case is IP65 waterproof and you can move it with the handles on both sides, freeing you from the worry of installing indoors or outdoors.

12v lithium ion battery 400ah Specifications:

Nominal Voltage 12V
Nominal Capacity 400Ah
Standard Charge Current 20A (0.2C rate)
Max. Charge Current 800A (3C rate)
Organization way 4S1P 3.2V 100AH LiFePO4 cells battery
Working voltage 2.5- 3. 65v
Standard charging current 400Ah
Charge Cut-off Voltage 3.65V
Discharge Cut-off Voltage 2.5V
Inner Resistance(Impedance) ≤ 0.3 mΩ (At 0.2C rate, 2.0V cut-off)
Weight 8.5kg
Battery cell type LiFepo4 battery for solar panel or solar heating system or electric car battery pack
Dimension customized
Operating Temperature Charging:0°C ~ 55°C, Discharging: -22°C ~ 55 °C
Storage Temperature Storage Temperature -20°C ~ 60°C


  • Passive cooling
  • Automatic passive cell balancing
  • IP50 for most of the marine platforms
  • More than 3000 times cycle life.
  • Auto heating mechanism at low temperature (optional)
  • Automatic protection against overcharge or over-discharge
  • Automatic shut-off at unsafe temperatures
  • Data logging for cell monitoring (performance, state of health)
  • Warning indicators (LED and buzzer) at low energy state
  • Mute button available for muting the persistent alarms
  • Can be connected in series and parallel
  • Have passed different tests.No explosion,no smoke,no leakage.
  • Bluetooth function can be added to read battery status
  • 10 years manufacturer’s warranty.


Flykol Lithium battery use a built-in Battery Management System (BMS) designed to automatically disconnect the charging or discharging circuits to prevent damage to the cells and internal electronics from abnormal operation and helps to ensure safe and accurate operation of the battery.


  • Low Voltage Protection Switch – Automatically disconnects the discharge circuit to prevent damage to the cells if the battery drains below a pre-set voltage.
  • Over Voltage Protection Switch – Automatically disconnects the charging circuit to prevent damage to the cells if the battery is being charged above a pre-set maximum voltage.
  • Short Circuit and Over Current Protection Switch – Automatically disconnects the discharge circuit if the load draws currents above pre-set limits.
  • Reverse Polarity Protection Switch – Automatically disconnects the charge and discharge circuits if a reverse polarity condition is detected.
  • Thermal protection – Built-in thermal sensors will automatically disconnect the charge and discharge circuits when excessive temperatures are detected.


The BMS balances the cells through top-end balancing and will discharge cells that exceed 3.65V during charging.


  • THERMAL FUSE: Our latest prismatic cell technology is manufactured with an internal thermal safety fuse between the anode and cathode that will break and disconnect in the unlikely event the cell would begin to overheat.
  • SAFETY VENT: Each cell has a high-pressure safety vent that will flip open to release energy and prevent explosion.
  • FLAME RETARDANT ELECTROLYTE: Our cells are manufactured with a flame retardant additive in our electrolyte.


【All-New Design, All-Round Safety】The lithium RV battery is wear-resistant and durable thanks to the newly adopted high-quality SPCC battery case, and we optimize the internal layout and construction. The battery also comes with a main switch to turn it on or off at the touch of a button. And there is a thermometer and hygrometer on the top to display the battery temperature and humidity in real time.

【Compact in Size Max on Power】12V 400Ah LiFePO4 RV battery is equivalent to the energy of 4 x 100Ah battery but took up only 1.1ft³ of space and is smaller than 4x100ah battery. And It will be easier to maintain and install without the need for excessive wires and money. It helps you save money and space.

【Upgraded 250A BMS and Low Temp Cutoff 】After years of research and testing, we have adopted grade A cells that are fitter for RV/camper use, giving the battery powerful and stable performance throughout every cycle. Make your journey trouble-free. And Low temp cutoff protection prevents battery damage in a low-temperature environment.

【Safety & ECO-Friendly】 The stable Lithium Iron Phosphate chemical structure makes the LiFePO4 battery not burn or explode even at high temperature, short circuit, impacts, and drop. Highest-level safety based on UL Testing Certificate for the cell inside the battery. And it does not contain any heavy metals or rare metals and is more environmentally friendly, which is called a green battery.

Wide Range of Application

Widely used in RV, camping car, marine,boat,golf carts,sightseeing cars,solar backup,solar pv light, industrial equipment, and other deep cycle replacement.

Frequently Asked Questions

How long does it take to charge 400Ah lithium battery?

Once this voltage is achieved, we can calculate our recharge rate by looking at the amps of our recharging current. If our battery have 400 amp/hours of energy when fully charged, it would take a 40 amp current around 10 hours to recharge them fully.

How long will a 12V 400Ah battery last?

“12V 400Ah LiFePO4 battery provides you 5.12kWh energy supply, last 12 days to keep you away from the power outage(ensure a daily electricity demand of 0.4kWh).”

What is the difference between 12V 400Ah and 24V 200Ah?

Well, they each contain the same amount of energy, as 12V∗400Ah=24V∗200Ah=4800Wh=4.8kWh . The voltage of the battery is different and therefore they’re not simply interchangable, as device are designed to operate off a certain voltage.

More applications:12V Lithium Battery24V Lithium Battery36V Lithium Battery48V Lithium BatterySolar Lithium BatteryLithium Trolling Motor BatteryGolf cart lithium batteryLithium RV BatteryMarine lithium battery

1 review for 12V 400AH Deep Cycle Lithium ion Battery

  1. Luis gil

    Hi I would like to know if this battery can be charger with truck alternator

    • Flykol

      yes you can

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