Basic Knowledge And Applications of 12V Lithium Batteries

1. What is a 12V Lithium Battery?  

A 12V lithium battery is a battery pack composed of 3 or 4 lithium cells connected in series. Each cell's capacity and voltage can be customized to meet specific requirements, offering high safety and environmental friendliness.  

A common 12V lithium battery model is ICR18650 3S2P, with a nominal voltage of 11.1V, a discharge voltage range of 11.1V-12.6V, a standard discharge current of 3.5A, and a capacity of up to 7.0Ah. The operating temperature range for 12V lithium batteries is as follows:  

Charging Temperature: 0℃~45℃  

Discharging Temperature: -20℃~60℃  

With high energy density, long lifespan, and eco-friendly features, 12V lithium batteries are an ideal power source for modern electronic devices.

2. Types of 12V Lithium Batteries  

Based on materials, 12V batteries mainly include:  

12V Lithium Batteries  

12V Lead-Acid Batteries  

12V NiMH Batteries  

12V Alkaline Batteries  

Among them, 12V lithium batteries are composed of 3 lithium cells (3.7V each) in series, with a full charge voltage of 12.6V (4.2V per cell).  

Special Type: -40℃ Low-Temperature Lithium Battery  

Model: 18650 12V 3000mAh  

Nominal Voltage: 12.0V  

Capacity: 3000mAh  

Dimensions: L57*W20*T75mm or L38*W36*T75mm  

Charging Temperature: 0℃~45℃  

Discharging Temperature: -40℃~60℃  

3. Size and Weight of 12V Lithium Batteries  

 Size : The size of a 12V lithium battery depends on its capacity—larger capacity means larger size.  

 Weight : Lithium batteries are known for their lightweight. For example, in the electric vehicle industry, lithium batteries are gradually replacing lead-acid batteries due to their higher capacity, lighter weight, and smaller size.  

 Charge/Discharge Current : The current is determined by the device's power—higher power requires higher current.  

4. Usage Precautions  

 Charger Compatibility : Use dedicated chargers for different brands and models of 12V lithium batteries to avoid damage.  

 Charging Time :  

  Summer: Stop charging when the charger indicator turns green.  

  Winter: Float charge for 1-2 hours after the indicator turns green to prevent overcharging.  

 Temperature Impact :  

  High temperatures (e.g., 45℃) can reduce battery life by up to 40%.  

  Avoid charging immediately after use to prevent overheating.  

5. Applications of 12V Lithium Batteries  

12V lithium batteries are widely used in the following fields:  

Special Equipment  

Medical Devices  

Emergency Firefighting  

Security and Communication  

Photovoltaic Energy Storage  

Industrial Instruments  

Consumer Electronics  

We focus on customer needs, providing customized 12V lithium battery solutions to ensure high-quality, safe, reliable, and eco-friendly products.