Redway Battery (US)


12V 120Ah Factory LiFePO4 Battery (Group 31)

12V 120Ah Factory LiFePO4 Battery (Group 31)

Production Info

✅ High Quality

✅ Advance Feature

✅ Super Demand

✅ Reasonable

✅ Long Lasting

✅ Good


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Redway Battery offers a full range of lithium batteries in BCI Group 24, Group 27, Group 31, Group 34, Group 35, Group 51, Group 51R, Group 78, Group 8D dimensions, etc. We are a professional lithium battery factory. We undertake OEM/ODM production of lithium battery, please Contact us.

12V120Ah Specifications
Cell Type LiFePO4
Nominal Voltage 12.8V
Nominal Capacity 120Ah
Nominal Energy 1.53kWh
Charge Voltage 14.6V
Discharge Voltage 10V
Max. Continues Charge Current 100A
Max. Continues Discharge Current 100A
[L x W x H]
330 x 172 x 215 mm
13 x 6.8 x 8.5 in
Weight 10 kg
22 lb
IP Rating IP65 / (More request)
Series & Parallel 4S8P
Max. Battery Parallel 4P to 6.14kWh (More request)
Internal Resistance ≤30mΩ
Cycle Life >4000 cycles
Self-Discharge 3% (Per month)
Charge Temperature 0°C ~ 60°C
32°F ~ 140°F
Discharge Temperature -20°C ~ 65°C
-4°F ~ 149°F
Optional Functions Bluetooth / WiFi / LCD / LED Touch Screen / RS485 / RS232 / CAN / 4G, 5G / GPS / APP
Charger High current fast charger
BMS Intelligent BMS protection
Terminal M8 Bolts
Battery Case ABS (Fireproof plastic)
Warranty 3 Years
Silk-Screen / Label Printing Yes
User Manual / Warranty Card Yes
Customization / OEM / ODM Yes
Shipment Yes
Manufacturer of Redway Factories Dongguan ✔
Certifications UL, FCC, IEC, CE, RoSH, UN38.3, MSDS / (More request)



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How long will a 12V 120AH lithium battery last?

How long a 12V 120AH lithium battery lasts depends on what you’re powering. First, figure out the device’s power needs in watts. Then, divide that by the battery’s voltage to get the current in amperes. Finally, divide the battery’s capacity by the current to estimate runtime in hours. Factors like device efficiency and battery condition can affect actual runtime.

Let’s break it down:

  1. Understand Your Device’s Needs: Find out how much power your device uses. This could be something like a camping lantern, a phone charger, or even a small fridge in an RV.
  2. Do Some Math: Once you know the device’s power in watts, divide that number by 12 (the battery’s voltage) to see how many amps it draws.
  3. Consider the Battery’s Capacity: A 120AH battery means it can deliver a certain amount of power over time. This is like how big the gas tank is in a car.
  4. Calculate the Time: Divide the battery’s capacity by the amps the device uses. This tells you how long the battery will last before needing a recharge.
  5. Real-World Example: Let’s say you have a camping lantern that uses 10 watts. Divide 10 by 12 (the battery’s voltage), and you get about 0.83 amps. Divide 120 (the battery’s AH) by 0.83, and you get around 144 hours. So, your lantern could run for about 6 days on this battery.
  6. Keep in Mind: Other things like temperature and how much you use the device can affect the battery life. It’s also good to check the battery’s health regularly.

So, understanding how much power your device needs and the battery’s capacity can help you plan how long it’ll last. And remember, it’s always a good idea to have a backup plan, just in case!

How long does it take to charge a 12V 120Ah battery?

Estimating the lifespan of a 12V 120AH lithium battery involves various factors like battery type and load. Lithium-ion batteries typically last 2-3 years or 300-500 charge cycles. To calculate runtime, divide battery capacity by load. Efficiency factors like battery discharge and inverter efficiency also affect lifespan. Consider manufacturer recommendations for accuracy. Regular maintenance and proper charging practices extend battery life.

Let’s simplify:

  1. Understanding Battery Life: Figuring out how long a 12V 120AH lithium battery will last is crucial. It depends on various factors like the type of battery and how much power it delivers.
  2. Key Factors:
    • Battery Type: Different lithium batteries have different lifespans, usually lasting around 2-3 years.
    • Load Connection: The things you connect to the battery affect how long it lasts. More power-hungry devices drain it faster.
  3. Efficiency Matters: Efficiency plays a big role too. How much power the battery loses during use and how efficiently it converts energy affect its overall lifespan.

By understanding these factors, you can better estimate how long your battery will last and take steps to prolong its life.

Why is my 12v lithium battery not charging?

If your 12V lithium battery won’t charge, common reasons include a faulty charger, BMS failure, or damaged charging system. Check connections, inspect the BMS, and verify charger compatibility. Avoid charging in extreme temperatures. If issues persist, consult a professional. Safety first!

Let’s simplify:

  1. Troubleshooting Charging Issues: If your 12V lithium battery isn’t charging, don’t panic! Let’s explore some common reasons and solutions.
  2. Key Causes:
    • Faulty Charger: Check if the charger is working properly and compatible with lithium batteries. Loose connections can also be a culprit.
    • BMS Failure: The Battery Management System (BMS) monitors battery status. If it fails, charging might be affected.
    • Damage to Charging System: Look for damage in wires, connectors, or fuses. Even small issues can disrupt charging.
  3. Additional Considerations: Pay attention to battery state and external factors like temperature. If problems persist, seek professional help. Stay safe!

What is the maximum charging current for a 12V 120Ah battery?

Yes, LiFePO4 batteries require a charger tailored to their voltage and charging needs for safety and efficiency. While a lead-acid charger can work in a pinch, it’s not ideal. LiFePO4 batteries need precise voltage and protection from overcharging provided by a dedicated charger.

Let’s break it down:

  1. Understanding LiFePO4 Battery Charging: LiFePO4 batteries, like the 12V 120Ah ones, need special consideration when it comes to charging. They require chargers designed specifically for their chemistry to ensure safe and efficient charging.
  2. Key Points:
    • Charging Voltage Compatibility: LiFePO4 batteries have different voltage needs compared to lead-acid batteries commonly used in vehicles. They require a charging voltage of around 14.6V, which differs from the typical range of lead-acid chargers.
    • BMS Protection: LiFePO4 batteries have a Battery Management System (BMS) that safeguards against overcharging. Using a lead-acid charger may exceed safe voltage limits, triggering the BMS to halt charging to prevent damage.
    • Efficiency Considerations: While it’s possible to charge LiFePO4 batteries with a lead-acid charger, it’s less efficient and may take longer due to differences in the charging cycle.
  3. In Summary: While you can technically use a lead-acid charger in an emergency, it’s best to invest in a dedicated LiFePO4 charger for optimal performance and longevity of your battery. Ensuring the charger aligns with the specific voltage and protection needs of LiFePO4 batteries is crucial for safe and efficient charging.

What is the difference between 12V 100Ah and 120Ah battery?

Discover the benefits of using a 12V 120Ah lithium battery for deep cycle applications. Lightweight and maintenance-free, it lasts over 2000 cycles. Ideal for RVs, boats, and solar power, but not recommended for vehicle starting due to high current draw. Considerations include avoiding extreme cold and ensuring charging system compatibility. Follow manufacturer guidelines for best results.

  1. Understanding Deep Cycle Batteries: Exploring the benefits of a 12V 120Ah lithium battery for long-term power needs.
  2. Key Points:
    • Advantages: These batteries are lightweight, lasting over 2000 cycles, making them ideal for continuous use.
    • Applications: Commonly used in RVs, boats, and solar power setups for reliable energy storage.
    • Not for Starting: Avoid using them as vehicle starting batteries due to their sensitivity to high current draw.
    • Considerations: Ensure they’re not exposed to extreme cold and check charging system compatibility for optimal performance.

A 12V 120Ah lithium battery is great for long-term power needs in various applications but isn’t suitable for vehicle starting. Keep them away from extreme cold and check compatibility for best results.

Can a 12V 120AH lithium battery be used as a deep cycle battery?

Discover the benefits of a 12V 120Ah lithium battery for long-term power needs. Lightweight and lasting over 2000 cycles, it’s ideal for RVs, boats, and solar power. Not recommended for vehicle starting due to sensitivity to high current draw. Avoid extreme cold and check charging system compatibility for best results.

  1. Benefits of a 12V 120Ah Lithium Battery:
    • Lasts Longer: These batteries keep providing power for a long time without wearing out quickly.
    • Light and Strong: Even though they store a lot of energy, they’re not heavy, and they can handle being used many times.
    • Works Everywhere: You can use them in many places, like RVs, boats, and solar panels, to keep things running smoothly.
  2. Not Good for Starting Vehicles:
    • Sensitive to Big Jumps: These batteries don’t like when a vehicle needs a lot of power all at once, like when starting a car.
    • Keep Them Comfortable: They don’t like being too cold, so it’s important to protect them from freezing temperatures.
  3. In a Nutshell:
    • A 12V 120Ah lithium battery is handy for keeping things powered for a long time in different places.
    • But remember, they’re not great for starting cars, and they prefer not to get too chilly.

Do 12V 120Ah LiFePO4 batteries need a special charger?

Yes, 12V 120Ah LiFePO4 batteries require a special charger tailored to their unique needs. Unlike other batteries, LiFePO4 batteries have specific voltage and charging requirements for safe and efficient charging. While a lead-acid charger can work in emergencies, it’s not as efficient and may take longer. For optimal performance and longevity, investing in a dedicated LiFePO4 charger is recommended.

Now, these batteries, especially the 12V 120Ah ones, need a charger that’s just for them. Here’s why:

  1. Voltage Compatibility: Regular chargers, like the ones for lead-acid batteries, might not match the needs of LiFePO4 batteries. They need a specific voltage to charge safely and effectively.
  2. Battery Management System (BMS): LiFePO4 batteries come with a smart system called a BMS that keeps them safe during charging. If the charger doesn’t match up with the battery’s needs, the BMS might stop charging to avoid damage.
  3. Efficiency Matters: While you can use a regular charger in a pinch, it might take longer to charge a LiFePO4 battery properly. That’s why it’s a good idea to invest in a charger made specifically for these batteries for the best performance and durability.

So, to keep your 12V 120Ah LiFePO4 battery in top shape, it’s best to use a charger that’s designed just for it!

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