12v Deep Cycle Lithium Batteries

Deep cycle 12v lithium battery, 3000+ Cycles 12 volt Rechargeable LiFePO4 batteries for Solar Power, UPS, RV, golf cart, marine, boat batteries. 100AH, 200AH, 10Ah, 30AH, 50AH, 60Ah, etc.

Battery Voltage


Lead 12V lithium ion battery manufacturer

NPP Power has over 20 years of experience in battery and battery pack manufacturing, and LiFePO4 batteries are now gradually replacing lead-acid batteries for RV, Marine, home energy storage, golf carts, and solar commercial energy storage, due to their lightweight and high energy density. NPP 12V lithium battery has more than 3000 cycle life with 80% DOD, built-in BMS, and equalization circuit. Passed various standards such as IEC/UL/ISO/CE/ROHS/UN38.3/MSDS certificates to ensure batteries with high quality and performance.

12v Batteries

12v lithium battery can be connected in series and parallel for higher voltage, or more capacity.

Lighter weight. Deep cycle. Long life service.

Ensure after-sales and provide technical support.

12 volt Lithium Battery Backup for Home

12v Server Rack Battery

12V Lithium battery : The Ultimate FAQ Guide

What is a 12V lithium battery?

A 12V lithium battery is a type of rechargeable battery that has a nominal voltage of 12 volts. It utilizes lithium-ion technology, which offers high energy density, longer cycle life, and relatively low self-discharge. These batteries are commonly used in various applications, such as portable electronic devices, electric vehicles, renewable energy systems, and power tools. They provide a reliable and efficient power source due to their ability to deliver a stable voltage output over their discharge cycle. It’s important to note that the actual voltage of a fully charged lithium battery might be slightly higher than 12V, around 12.6-12.8V.

12v lithium batteries are usually made of lithium cells in series, 3.2v is a common value for lithium-ion cells. 3.2 * 4≈ 12.8v, 12v battery would require 4 lithium cells(each with a nominal voltage of 3.2V) to make total voltage 12.8v lithium battery.

What voltage is a 12V Lithium ion battery?

A 12V lithium-ion battery refers to its nominal voltage, which is the average voltage output during most of its discharge cycle. However, the actual voltage of a fully charged lithium-ion battery can be slightly higher than 12V, typically around 13.3-13.4v.

During discharge, the voltage gradually decreases until it reaches a lower threshold, usually around 3.0V per cell. It is important to note that lithium-ion batteries are typically composed of multiple cells, usually in series, which means that the voltage of a 12V lithium-ion battery is the aggregate of the individual cell voltages.

The specific voltage values can vary depending on the manufacturer and the battery’s state of charge, temperature, and load conditions. To obtain accurate voltage readings, it is recommended to use a multimeter or a specialized battery voltage meter.

How long does a 12v Lithium battery last?

The lifespan of a 12v LiFePO4 battery can vary depending on several factors including the quality of the battery, usage patterns, and environmental conditions. Generally, a high-quality lithium battery can last anywhere from 2 to 10 years or 3000 cycles life in 80%DOC. This is the limit of the use of lithium batteries at this stage, there are many irresponsible businesses in the market exaggerate this data, and even give unrealistic warranty period, well-known manufacturers as NPP provide a 2-3 year warranty period.

However, it’s important to note that continuous usage and deep discharge cycles can significantly reduce the lifespan of the battery. For optimal performance and longevity, it’s recommended to follow the manufacturer’s guidelines for charging, discharging, and storage of the battery.

What is the highest voltage of 12v Lithium batteries?

The highest voltage of a 12V Lithium battery can vary depending on the specific type and manufacturer of the battery. In general, a fully charged 12V LiFePO4 battery can have a voltage ranging from 12.6V to 13.8V. It is important to note that the voltage of a Lithium battery changes throughout its discharge cycle, and its voltage will gradually decrease as it is being used. Additionally, it is crucial to follow the manufacturer’s guidelines and specifications for charging and discharging the battery to ensure proper usage and prevent any potential damage.

Are 12 volt lithium batteries safe?

Yes, Today, lithium-ion batteries are one of the most successful and safest battery chemicals. Compared with other battery production is also the highest, the global production of lithium batteries has exceeded 2,000GWh. 12-volt lithium batteries are generally considered safe when used and handled properly. However, it is important to follow certain safety guidelines to ensure their safe use. Here are a few key points to consider:

  • Choose quality batteries: Purchase lithium batteries from reputable manufacturers to ensure their reliability and compliance with safety standards.
  • Use appropriate charging equipment: Always use chargers that are specifically designed for lithium batteries and follow the manufacturer’s instructions for proper use.
  • Avoid overcharging: Overcharging lithium batteries can lead to overheating and potential safety hazards. Use chargers with built-in safety features, such as automatic shut-off or voltage regulation.
  • Protect from extreme temperatures: Lithium batteries should be stored and used within the recommended temperature range specified by the manufacturer. Exposing them to excessive heat or cold can reduce their performance and safety.
  • Handle with care: Avoid dropping or subjecting lithium batteries to physical damage, as it may cause internal damage and potential leakage of hazardous materials.
  • Dispose of properly: When the battery reaches the end of its life, ensure it is disposed of according to local regulations or recycling programs designed for lithium batteries. Do not dispose of them in regular garbage.

By following these guidelines, you can safely use 12-volt lithium batteries for various applications such as portable electronics, small appliances, or even as power sources for renewable energy systems.

What is the difference between 12V lithium batteries and 12V AGM batteries?

The main difference between a 12V lithium battery and a 12V AGM (Absorbent Glass Mat) battery lies in their underlying chemistry and construction. Lithium batteries can usually discharge 90% to 95% deeply and also have no memory effect, while AGM batteries are usually recommended to discharge no less than 50% in order to avoid battery damage. This means that lithium batteries last longer per charge than AGM batteries, this also means that they are less vulnerable to more than DoD damage.


  • 12 volt Lithium ion Battery: Lithium batteries use lithium-ion chemistry, which offers high energy density, allowing them to store more energy in a smaller and lighter package.
  • 12 volt AGM Battery: AGM batteries are typically made of lead-acid chemistry. They use an absorbed glass mat separator to hold the electrolyte, which is a mixture of water and sulfuric acid.

Energy Density:

  • 12 volt Lithium Batteries: Lithium batteries have a higher energy density, meaning they can store more energy per unit of weight. They are lightweight and can provide a higher capacity to power a device or system.
  • 12 volt AGM Batteries: AGM batteries have a lower energy density compared to lithium batteries. They are heavier and larger for the same capacity, making them less suitable for applications where weight and size are crucial.

Performance and Lifespan:

  • 12V Lithium Battery: Lithium batteries generally offer better performance with higher efficiency and a longer lifespan. They have a higher cycle life, which means they can be charged and discharged more times without significant degradation.
  • 12V AGM Battery: AGM batteries have a lower cycle life compared to lithium batteries. They tend to handle deep cycling and high discharge rates less efficiently and may require more frequent maintenance.

Charging and Maintenance:

  • 12 volt Lithium ion Batteries: Lithium batteries are typically designed for plug-and-play operation, requiring minimal maintenance. They can hold a charge for longer periods and have less self-discharge compared to AGM batteries.
  • 12 volt AGM Batteries: AGM batteries require regular maintenance, such as checking electrolyte levels and periodically recharging to prevent sulfation. They are more susceptible to self-discharge and need to be kept on a charger when not in use for extended periods.


  • 12V LiFePO4 batteries: Lithium batteries are commonly used in portable electronics, electric vehicles, renewable energy systems, and other applications where weight, size, and long-lasting performance are vital.
  • 12V AGM Batteries: AGM batteries are frequently used in automotive applications, boats, RVs, and backup power systems. They are more affordable and better suited to applications where weight and size are less critical. But it is gradually replaced by lithium batteries.

It’s important to consider these differences when choosing between a 12V lithium battery and a 12V AGM battery, as their suitability depends on the specific requirements, budget, and priorities of the intended application.

What are advantages of the 12v lithium battery over a 12v lead acid battery?

One advantage of a 12V lithium battery over a 12V lead acid battery is its higher energy density. Lithium batteries have a higher energy-to-weight ratio, which means they can store more energy for the same weight compared to lead acid batteries. This higher energy density allows lithium batteries to be lighter and more compact, making them suitable for applications where weight and size are important factors.

Additionally, lithium batteries have a lower self-discharge rate compared to lead acid batteries. This means that they can retain their charge for a longer period of time without needing to be recharged. Lead acid batteries, on the other hand, tend to lose their charge more quickly, especially when not in use for extended periods.

Lithium batteries also have a longer lifespan compared to lead acid batteries. They can withstand a higher number of charge-discharge cycles before their capacity significantly degrades. This longevity makes lithium batteries more cost-effective in the long run since they don’t need to be replaced as frequently.

Furthermore, lithium batteries have a higher charging efficiency. They can be charged at a faster rate, allowing for quicker recharging times. Lead acid batteries, on the other hand, may require longer charging times and can be less efficient in terms of energy transfer during the charging process.

It is important to note that while lithium batteries offer these advantages, they also come at a higher initial cost compared to lead acid batteries. Nonetheless, the benefits in terms of energy density, lifespan, and charging efficiency make them a preferred choice in various applications such as portable electronics, electric vehicles, and renewable energy systems.

How low can you run a 12v lithium battery?

When the voltage of a 12-volt lithium battery drops below a certain threshold, usually around 10.5 to 11.0 volts, it is considered dead or depleted.

Discharging the battery below this threshold can cause damage to the battery cells and reduce their overall lifespan. Additionally, lithium batteries have a built-in protection circuitry that cuts off the output when the voltage drops too low, preventing further discharge.

Therefore, it is advisable to monitor the voltage level during use and recharge the battery once it reaches around 11-11.5V to maintain its health and longevity.

Can you overcharge a 12V lithium battery?

Yes, it is possible to overcharge a 12V lithium ion battery if proper precautions are not taken. Overcharging a lithium battery can lead to various safety hazards, including overheating, swelling, leakage, and even explosion in extreme cases.

To avoid overcharging a 12V lithium battery, it is important to use a charger specifically designed for lithium batteries. These chargers typically have built-in BMS protection mechanisms such as voltage and current monitoring, temperature sensors, and charging algorithms that prevent overcharging.

It is recommended to follow the manufacturer’s instructions and guidelines for charging the lithium battery. Typically, these guidelines include charging at a specific voltage and current limit and avoiding charging beyond a certain temperature range.

It is also important to monitor the battery during charging and disconnect it from the charger once it reaches its full charge. Some chargers have a feature that automatically stops charging when the battery is full.

By following these precautions and using a dedicated lithium battery charger, you can prevent overcharging and ensure the longevity and safety of your 12V lithium battery.

What is the full charge of a 12V lithium ion battery?

The full charge of a 12V lithium ion battery depends on its capacity, which is typically measured in ampere-hours (Ah). To calculate the full charge capacity, you need to multiply the battery’s capacity (in Ah) by its voltage (in V).

For example, if a lithium-ion battery has a capacity of 100Ah and a voltage of 12V, the full charge capacity would be:

Full charge capacity = Capacity (Ah) * Voltage (V) = 100Ah * 12V = 1200 watt-hours (Wh)

So, the full charge of a 12V lithium-ion battery with a capacity of 100Ah would be 1200 watt-hours (Wh).


What is the maximum charging voltage for a 12 volt lithium battery?

The maximum charging voltage for a 12-volt lithium battery is typically around 14.4 to 14.6 volts. This range ensures efficient and safe charging of the battery while preventing overcharging, which can potentially lead to damage or reduced battery life. It is important to refer to the manufacturer’s specifications or guidelines for the specific lithium battery you are working with, as different battery chemistries and designs may have slightly different voltage requirements.

How do you charge a 12 volt lithium battery?

To charge a 12-volt lithium battery, you can follow these steps:

Check the battery specifications: Different lithium batteries may have specific charging requirements. Consult the battery’s manual or specification sheet to ensure you are using the correct charging method.

  • Select a suitable charger: Lithium batteries require a charger specifically designed for them. Look for a charger that is compatible with 12-volt lithium batteries and has the necessary capacity to handle the size of your battery.
  • Connect the charger: Ensure the charger is unplugged before connecting it to the battery. Most chargers have two clamps or connectors: one red (positive) and one black (negative). Connect the red clamp to the positive terminal of the battery and the black clamp to the negative terminal.
  • Set the charger settings: Some chargers may have adjustable settings for charge rate and voltage. If needed, set the charger to the appropriate settings recommended by the battery manufacturer.
  • Plug in the charger: Once the charger is properly connected, plug it into a power outlet. Ensure the charger is receiving power and turned on.
  • Monitor the charging process: Lithium batteries should be monitored while charging to prevent overcharging, which can damage the battery or even pose a safety risk. Many chargers have built-in safety features that automatically stop charging once the battery reaches its full capacity.
  • Disconnect the charger: Once the battery is fully charged, unplug the charger from the power outlet and disconnect it from the battery. Safely stow the charger and properly store the lithium battery for future use.

It’s important to note that lithium batteries can be sensitive to incorrect charging methods or using an incompatible charger, which can lead to safety hazards or damage to the battery. Always refer to the battery manufacturer’s guidelines and follow proper safety precautions when charging lithium batteries.

Can you charge 12V lithium ion batteries with regular charger?

No, you cannot charge a 12V LiFePO4 battery with a regular charger. Lithium batteries require specific charging algorithms to safely and efficiently charge them. Regular chargers are typically designed for lead-acid batteries and do not have the necessary circuitry to monitor and control the charging process for lithium batteries.

Using a regular charger to charge a lithium battery can be dangerous and may result in overcharging, overheating, or even causing the battery to catch fire or explode. It is vital to use a charger specifically designed for lithium batteries to ensure proper and safe charging.

lithium 12 volt batteries typically require a specific charger designed for lithium batteries. The reason is that lithium batteries have different charging characteristics compared to other types of batteries, such as lead-acid batteries. Using the wrong charger can lead to overcharging or undercharging, which can damage the battery or reduce its performance.

When choosing a charger for a lithium 12 volt Lithium battery, look for one that is explicitly labeled as compatible with lithium batteries and has the appropriate voltage and current ratings for your specific battery. It’s essential to follow the manufacturer’s guidelines and instructions for charging to ensure the battery’s longevity and safe operation.

How long does it take to charge a 12 volt lithium battery?

The time it takes to charge a 12 volt lithium battery depends on a few factors:

  • Charging method: The time can vary depending on whether you are using a constant voltage charger or a smart charger specifically designed for lithium batteries. Smart chargers usually have a built-in controller that optimizes the charging process, resulting in faster and more efficient charging.
  • Battery capacity: The capacity of the lithium battery is measured in ampere-hours (Ah). The higher the capacity, the longer it will take to charge.
  • Charging current: The charging current determines how quickly the battery charges. Higher charging currents will charge the battery faster, but it’s important to use a charging current within the recommended range specified by the battery manufacturer.

As a rough estimate, if we assume a standard charging current of around 1-2 amperes, it may take approximately 5-10 hours to fully charge a 12 volt lithium battery with a capacity of 10 ampere-hours. However, it’s important to consult the battery manufacturer’s specifications or user manual for more accurate charging times, as they can vary.

What should a 12 volt lithium battery read when fully charged?

A 12 volt lithium battery should typically read around 12.6 to 13.2 volts when fully charged. This voltage range indicates that the battery is at its optimal charge level and ready for use. However, it’s worth noting that the specific voltage readings may vary slightly depending on the brand, model, and temperature conditions.

What is 12V lithium ion batteries used for?

A 12V lithium battery can be used for various purposes, depending on its capacity and specifications. Here are some common uses, Portable Electronics, Electric Vehicles, Solar Power Storage, Home Backup Power, Marine and RV Applications, UPS (Uninterruptible Power Supply), Robotics, etc:

  • Portable Electronics: It can power small devices like smartphones, tablets, Bluetooth speakers, and cameras on the go.
  • Electric Vehicles: Many electric scooters, bikes, and even some cars use 12V lithium batteries as part of their power systems.
  • Solar Power Storage: In off-grid solar systems, 12V lithium batteries can store energy generated from solar panels for later use.
  • Home Backup Power: These batteries can provide backup power during power outages, allowing essential devices like lights, routers, or medical equipment to keep running.
  • Marine and RV Applications: 12V lithium batteries are commonly used in boats and recreational vehicles (RVs) to power lighting, appliances, and other electrical equipment.
  • UPS (Uninterruptible Power Supply): They can be used in UPS systems to provide temporary power in case of electrical grid failures or fluctuations.
  • Robotics: In small robot projects or DIY electronics, 12V lithium batteries can provide a compact and efficient power source.

Remember to always check the specifications and compatibility requirements for your specific application before using a 12V lithium battery.

How many lithium batteries can I connect in parallel?

The number of lithium batteries you can connect in parallel depends on several factors, including the specific batteries you are using, their voltage, capacity, and protection circuitry.

In general, it is possible to connect multiple lithium batteries in parallel to increase the overall capacity and current output. However, to ensure safe and reliable operation, there are a few important considerations:

  • Battery Voltage: The voltages of the batteries you want to connect in parallel should match. Connecting batteries with different voltages can cause imbalances, leading to inefficient operation and potential damage to the batteries.
  • Battery Capacity: The capacity (usually measured in ampere-hours, or Ah) of the batteries should be similar. This will help ensure that they discharge and charge evenly.
  • Battery Protection Circuitry: Lithium batteries often have built-in protection circuitry to prevent overcharging, overdischarging, and excessive current flow. When connecting batteries in parallel, it is crucial to ensure that all batteries have compatible protection circuitry to maintain safe operation.
  • Balancing: Over time, the individual batteries in a parallel configuration may discharge and charge at slightly different rates, potentially leading to imbalances. To prevent this, you can use a battery balancer or monitoring system that equalizes the charge levels between batteries.
  • Manufacturer Guidelines: Always refer to the manufacturer’s guidelines and specifications for the specific batteries you are using. They may provide recommendations or limitations on the number of batteries that can be safely connected in parallel.

While it is possible to connect multiple lithium batteries in parallel, it is essential to consider voltage, capacity, protection circuitry, balancing, and manufacturer recommendations to ensure safe and reliable operation.

At what voltage is a 12v lithium ion battery dead?

The voltage at which a 12V lithium-ion battery is considered “dead” can vary depending on the specific battery model and manufacturer. Generally, fully charged 12V LiFePO4 batteries have a voltage around 12.6-12.8 volts. As the battery discharges, the voltage gradually drops.

Typically, a lithium-ion battery is considered “dead” or fully discharged when its voltage falls below a certain threshold, which is usually around 10.5-11.0 volts for a 12V lithium battery. However, it’s important to note that discharging a lithium-ion battery to such low levels can be harmful to the battery’s health and could significantly reduce its overall lifespan.

To ensure the longevity and health of your lithium-ion battery, it is generally recommended to recharge it before it reaches these low voltage levels. Most devices or battery management systems will have built-in protections to prevent over-discharging, but it’s always a good practice to recharge the battery before it gets too low.

Speak To Our Expert

If you need help selecting the suited battery for your particular application, please feel free to contact us, NPP Global team-based sales and highly trained and qualified team of experts is standing by to take your questions.

Find us around the world

NPP has a network of battery warehouses and offices in different continents around the world.