SUNJ ENERGY
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LONG-LASTING POWER All Products
SUNJ ENERGY
PROVIDE INEXHAUSTIBLE DRIVING FORCE FOR THE REALIZATION OF INTELLIGENCE All Products
SUNJ ENERGY Batteries
POWER UP THE
INTELLIGENT LIFE All Products
Li-SOCl2 Battery

High-energy, long-life 3.6V Li-SOCl₂ batteries designed for demanding industrial applications requiring ultra-low self-discharge and wide temperature performance.

Li-SOCl2 Battery
Li-MnO2 Battery

Reliable 3V Li-MnO₂ batteries with high energy density, long shelf life, and stable output—ideal for security, medical, metering, and IoT applications.

Li-MnO2 Battery
Battery Capacitor

Reliable battery capacitors combining pulse power and energy density—ideal for AMR, IoT, tracking, security, and energy harvesting applications.

Battery Capacitor
Combined Power Solutions

SUNJ provides a combined power solution of ER battery and EPC battery capacitor, which can meet the needs of high pulse discharge while maintaining the characteristics of large capacity of the battery, in addition, it can effectively reduce the lag of lithium sub-battery discharge and improve battery performance.


Combined Power Solutions
Hot Products
ER14335M 2/3AA 3.6V

ER14335M 2/3AA 3.6V

ER14505M AA 3.6V

ER14505M AA 3.6V

ER17335M 2/3A 3.6V

ER17335M 2/3A 3.6V

ER17505M A 3.6V

ER17505M A 3.6V

ER18505M A 3.6V

ER18505M A 3.6V

ER26500M C 3.6V

ER26500M C 3.6V

ER34615M D 3.6V

ER34615M D 3.6V

ER14250H 1/2 AA 3.6V

ER14250H 1/2 AA 3.6V

ER18505H A 3.6V

ER18505H A 3.6V

ER26500H C 3.6V

ER26500H C 3.6V

All Products
Enabling the Future of Intelligent Devices Explore how our batteries enable smart, reliable solutions for real-world applications.
Utility Metering Utility Metering
Smart meters adopt primary lithium battery, Sunj primary lithium battery uses a unique corrosion-resistant material, has a stainless steel shell and cover, has excellent low-temperature performance and stable working voltage, contains non-combustible electrolyte, more safe, compared with other primary lithium batteries have a longer working life, 25°C annual self-discharge rate is less than 1% , It is suitable for complex working conditions such as extreme high and low temperature and high humidity.
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Alarm/Security Device Alarm/Security Device
SUNJ battery has good performance, high stability and low self-discharge rate, and can also be used in video surveillance equipment, intelligent door locks, intelligent manhole covers, intelligent fire hydrants, smoke alarm systems and carbon dioxide detectors.
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Internet of Things Devices Internet of Things Devices
With the development of information technology such as the Internet of Things and cloud computing, many iot devices have emerged, such as wireless sensor networks (WSN), industrial automation, intelligent transportation systems, home area networks (HAN), and intelligent energy management systems.
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Intelligent Transportation Intelligent Transportation
SUNJ batteries are widely used in the transport and logistics industry. The wide operating temperature range and high pulse performance of SUNJ batteries, excellent low temperature performance and long working life provide effective power support for logistics related applications such as cold chain transportation. In addition, there are ETC, tire pressure monitoring system, geomagnetic induction equipment.
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Tracking and Positioning Equipment Tracking and Positioning Equipment
With the development of technology, self-powered devices that use RFID wireless communication technology to effectively manage and monitor the movement of commercial transportation and other mobile devices are growing rapidly.
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Medical Equipment Medical Equipment
SUNJ lithium battery has the advantages of stable operating voltage, large pulse current, long life and widely used in surgical instruments, defibrillators, ventilators, monitoring instruments and other medical industries.
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Oil/Gas Exploration Oil/Gas Exploration
SUNJ Battery is dedicated to providing high-performance downhole battery pack solutions for the oil and gas industry, catering to critical equipment used in exploration, drilling, and production processes.
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Marine Lifesaving Marine Lifesaving
SUNJ batteries are also suitable for Marine life-saving equipment, buoys, beacons, lighthouses and other Marine equipment.
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CONTACT Customize Your Battery – Fast Quote & Expert Support
Tell us your requirements and get expert guidance on lithium battery solutions. Our team will respond promptly with a tailored quote and technical support.
Submit Your Request
Global Leader in Primary Lithium Battery Solutions Specializing in R&D, manufacturing, sales, and customer service.
SUNJ Energy (LUOYANG) CO., LTD.
SUNJ ENERGY is a leading manufacturer of 3.6V Li-SOCl₂ and 3.0V Li-MnO₂ batteries, and EPC super capacitors. Backed by 38 advanced production lines, we deliver 116 million high-reliability cells annually for global industrial markets.
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Facility Size
Facility Size
33300

m²

Production Lines
Production Lines
38
Annual Capacity
Annual Capacity
116

million

SUNJ Battery Insights & Guides
Which Types of Batteries for Your IoT devices? Which Types of Batteries for Your IoT devices?

Sep. 12, 2025

Built on over a century of research and innovation in energy storage, SUNJ’s range of miniature lithium-based batteries has been specially designed for connected devices and IoT applications.
Batteries for IoT – How to Choose the Best One Batteries for IoT – How to Choose the Best One

Sep. 12, 2025

Nickel-Metal Hydride (NiMH) or Nickel-cadmium (NiCd) are preferred in IoT devices that rely on next-generation networks, such as 5G/LPWA (Low Power Wide Area), or devices that operate across a wide temperature range.
14500 Battery vs AA Battery: Comprehensive Comparison Guide 14500 Battery vs AA Battery: Comprehensive Comparison Guide

Sep. 09, 2025

14500 batteries and AA batteries are similar in size but have completely different chemistries. The 14500 battery is physically the same size as an AA battery.
What is an ER26500 Battery? What is an ER26500 Battery?

Jun. 27, 2025

ER26500 batteries are commonly used in smart meters for electricity, gas, and water. These meters require long-lasting, stable power to accurately monitor consumption over extended periods.
ER14250 Battery Equivalent: Best Replacements Reviewed ER14250 Battery Equivalent: Best Replacements Reviewed

Jun. 26, 2025

ER14250 batteries are compact 3.6V lithium thionyl chloride (Li-SOCl₂) cells commonly used in low-drain electronic devices. They are favored for their high energy density, long shelf life, and extended operational lifespan, reducing the need for frequent replacements.
1/2 AA Battery vs. 14250 Battery 1/2 AA Battery vs. 14250 Battery

Jun. 17, 2025

1/2 AA and 14250 batteries are compact cylindrical cells widely used in electronic meters, security systems, medical devices, baby monitors, pet collars, and small EDC flashlights.
What Is a 4000 mAh Battery? Easy Guide to Basics What Is a 4000 mAh Battery? Easy Guide to Basics

May. 21, 2025

A 4000 mAh battery’s lifespan depends on its usage, but typically, it can power a smartphone for 8-12 hours of moderate usage or a Bluetooth speaker for up to 12 hours. In high-demand devices like drones or power tools, it may only last a couple of hours.
Primary Battery vs. Rechargeable Lithium Battery Primary Battery vs. Rechargeable Lithium Battery

May. 13, 2025

A primary lithium battery typically consists of four main components: a positive electrode (cathode), a negative electrode (anode), an electrolyte, and a separator.
The Difference Between Primary Lithium Primary Battery and Lithium Ion Battery The Difference Between Primary Lithium Primary Battery and Lithium Ion Battery

Apr. 16, 2025

Lithium batteries are divided into two categories: non-rechargeable and rechargeable. Non-rechargeable batteries are called primary batteries, which can only convert chemical energy into electrical energy at one time, and cannot restore electrical energy back to chemical energy.
What Is mAh on a Battery? Understanding Power Metrics What Is mAh on a Battery? Understanding Power Metrics

Apr. 09, 2025

The battery life of a 4000 mAh battery depends on the power consumption of the device it powers. To calculate battery life, divide the battery capacity (4000 mAh) by the device's current draw (in milliamps).
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