High Temperature Battery LiSOCL2 3.6V ER26500S 5500mAh

High Temperature Battery LiSOCL2 3.6V ER26500S 5500mAh: The Ultimate Power Solution for Extreme Environments

In industries where equipment operates under extreme conditions—from the scorching depths of oil drilling rigs to the harsh marine environments of open seas—reliability is not just a requirement but a critical safety imperative. The performance of electric equipment in these sectors hinges entirely on its power source, which must withstand extreme temperatures, deliver consistent output, and maintain long-term stability without compromising safety. For oil drilling, marine, and industrial professionals seeking a power solution that rises to these challenges, the Li-SOCl2 Battery 3.6V ER26500S 5500mAh Non-rechargeable High Temperature Battery emerges as the gold standard.

Engineered to thrive in the most unforgiving environments, this LiSOCL2 battery combines advanced chemistry, robust construction, and cutting-edge manufacturing to deliver unparalleled performance. With a wide operating temperature range of -30℃ to +150℃, a high nominal capacity of 5500mAh, and a suite of reliability-enhancing features, it is specifically designed to power critical equipment in oil drilling, marine, and other high-demand applications. In this comprehensive guide, we will explore the technical specifications, standout characteristics, real-world applications, and competitive advantages of the ER26500S high temperature battery, highlighting why it has become the preferred choice for industries where failure is not an option.

Understanding LiSOCL2 Battery Technology: The Science Behind Extreme Performance

To appreciate the capabilities of the ER26500S high temperature battery, it is essential to first understand the technology that powers it: lithium thionyl chloride (Li-SOCl2) chemistry. LiSOCL2 batteries are widely recognized as the premier choice for non-rechargeable power applications requiring long service life, high energy density, and resilience in extreme conditions. Unlike traditional alkaline or lead-acid batteries, LiSOCL2 batteries leverage a unique chemical reaction between lithium (anode) and thionyl chloride (cathode/electrolyte) to generate power, resulting in a range of performance benefits that make them ideal for high temperature environments.

Key Advantages of LiSOCL2 Chemistry for High Temperature Applications

LiSOCL2 chemistry offers several inherent advantages that make it well-suited for high temperature battery applications:

• Thermal Stability: The chemical structure of LiSOCL2 batteries is inherently stable at extreme temperatures, with no risk of thermal runaway or performance degradation even at +150℃. This stability is critical for equipment operating in oil drilling wells, where downhole temperatures can soar, or marine engines, where proximity to heat sources demands a power solution that can withstand constant high heat.

• High Energy Density: LiSOCL2 batteries boast one of the highest energy densities of any primary battery technology, enabling the ER26500S to deliver 5500mAh of capacity in a compact C-size form factor (26.2mm diameter × 50.5mm height). This high energy density translates to extended service life, reducing the need for frequent battery replacements in hard-to-reach or hazardous locations.

• Low Self-Discharge Rate: LiSOCL2 batteries exhibit an extremely low self-discharge rate—typically less than 1% per year—meaning they can retain over 90% of their capacity after 10 years of storage. This is particularly valuable for equipment that may remain dormant for extended periods, such as emergency backup systems or seasonal marine equipment, ensuring reliable power when it is finally needed.

• Stable Discharge Voltage: Unlike alkaline batteries, which experience a gradual voltage drop as they discharge, LiSOCL2 batteries maintain a nearly constant voltage throughout their service life. This stable discharge profile ensures that connected equipment operates at peak efficiency, preventing performance fluctuations or premature shutdowns.

The ER26500S high temperature battery builds on these inherent advantages, incorporating specialized materials and manufacturing processes to optimize performance for temperatures up to +150℃. From its corrosion-resistant casing to its high-purity electrolyte, every component is engineered to deliver consistent, reliable power in the most extreme conditions.

Technical Specifications: The ER26500S High Temperature Battery at a Glance

The Li-SOCl2 Battery 3.6V ER26500S 5500mAh is defined by a set of technical specifications that make it uniquely suited for high-temperature, high-demand applications. Below is a detailed breakdown of its key parameters, highlighting how each specification contributes to its exceptional performance:

These specifications are not just numbers—they are the result of rigorous engineering and testing, ensuring that the ER26500S high temperature battery can meet the demands of the most challenging applications. Whether powering a downhole sensor in an oil well or a communication device on a marine vessel, this battery delivers the performance and reliability that industries depend on.

Core Characteristics: Why the ER26500S High Temperature Battery Stands Out

The ER26500S LiSOCL2 high temperature battery is distinguished by six core characteristics that address the unique challenges of extreme environment applications. Each feature is engineered to enhance reliability, safety, and performance, making it the top choice for oil drilling, marine, and industrial professionals.

1. High Voltage (3.6V) for Consistent Equipment Performance

In industrial settings, equipment is designed to operate within a precise voltage range, and deviations can lead to inaccurate readings, reduced efficiency, or complete failure. The ER26500S high temperature battery delivers a stable 3.6V nominal voltage, which is widely compatible with oil drilling electric equipment, marine navigation systems, smart meters, and other critical devices.

Unlike alkaline batteries, which start at a higher voltage and decline gradually, LiSOCL2 batteries maintain a flat discharge curve. This means the voltage remains nearly constant from the first day of use until the battery is fully depleted, ensuring that equipment operates at peak performance throughout the battery’s lifespan. For oil drilling sensors that require precise data collection or marine communication devices that need consistent signal strength, this stable voltage delivery is non-negotiable.

The 3.6V output also provides ample power to support both continuous and pulse current demands. Whether the battery is powering a sensor’s steady data logging (500mA continuous current) or a valve’s sudden actuation (1000mA pulse current), it delivers the voltage needed to ensure smooth, reliable operation.

2. Wide Operating Temperature Range (-30℃ to +150℃): Thriving in Extreme Conditions

The most defining feature of the ER26500S is its exceptional operating temperature range of -30℃ to +150℃. This makes it one of the most versatile high temperature batteries on the market, capable of performing reliably in environments where other batteries would fail.

Performance in High Temperatures (+150℃)

Oil drilling operations are a prime example of an application that demands high temperature battery performance. Downhole drilling tools and sensors are exposed to temperatures that can exceed 120℃, and traditional batteries often suffer from capacity loss, electrolyte leakage, or thermal runaway in these conditions. The ER26500S, however, is engineered to withstand temperatures up to +150℃, retaining over 80% of its nominal capacity even at this extreme heat.

Its high-temperature tolerance is achieved through several key design elements:

• A robust stainless steel casing that dissipates heat efficiently and resists corrosion from harsh drilling fluids.

• A high-purity electrolyte that remains stable at elevated temperatures, preventing evaporation or chemical breakdown.

• Internal components made from heat-resistant materials that maintain structural integrity even in extreme heat.

This performance is not just theoretical—our ER26500S high temperature battery has been rigorously tested in real-world oil drilling environments, consistently delivering reliable power to downhole sensors, logging tools, and communication modules.

Performance in Low Temperatures (-30℃)

While the ER26500S is celebrated as a high temperature battery, it also excels in cold conditions. Marine equipment operating in polar regions or offshore environments during winter can face temperatures as low as -30℃, and many batteries struggle to deliver power in freezing conditions. The ER26500S, however, retains over 70% of its capacity at -30℃, ensuring that marine navigation systems, emergency beacons, and communication devices remain operational even in frigid temperatures.

This wide temperature range eliminates the need for separate batteries for hot and cold environments, simplifying inventory management and reducing costs for industries operating across diverse climates.

3. Stable Discharge Voltage: Ensuring Precision and Reliability

For equipment that relies on precise data or consistent performance—such as smart card meters (water, electricity, gas), medical devices, or scientific research equipment—stable discharge voltage is critical. Fluctuating voltage can lead to inaccurate readings, erratic behavior, or premature equipment shutdown, which can have serious consequences in safety-critical applications.

The ER26500S LiSOCL2 battery addresses this challenge with its inherently stable discharge profile. LiSOCL2 chemistry produces a constant voltage output throughout the battery’s discharge cycle, with minimal voltage drop even as the battery nears the end of its life. This means that a gas meter powered by the ER26500S will record usage accurately for years, while a marine navigation system will maintain consistent signal strength without unexpected fluctuations.

To validate this stability, we subject each ER26500S battery to rigorous discharge testing at both high and low temperatures. The results consistently show that the voltage remains within ±0.1V of the nominal 3.6V until the battery reaches its 2V cut-off voltage, ensuring that connected equipment operates reliably from start to finish.

4. Excellent Safety Performance: Mitigating Risks in Extreme Environments

Safety is paramount in industries such as oil drilling and marine, where equipment failures can lead to costly downtime, environmental damage, or even human harm. The ER26500S high temperature battery is engineered with multiple safety features to minimize risks such as leakage, overheating, short circuits, and explosion.

Inherent Safety of LiSOCL2 Chemistry

LiSOCL2 chemistry is inherently safer than many other battery technologies, thanks to its high thermal stability and low reactivity. Unlike lithium-ion batteries, which can experience thermal runaway if damaged or overcharged, LiSOCL2 batteries are non-rechargeable and have no risk of thermal runaway—even at temperatures up to +150℃.

Robust Casing and Sealing

The ER26500S features a thick-walled stainless steel casing that provides exceptional physical protection against impact, vibration, and corrosion. Oil drilling equipment and marine vessels are subject to constant movement and exposure to harsh substances (e.g., drilling mud, saltwater), and the battery’s casing is designed to withstand these conditions without compromising integrity.

In addition, the battery incorporates a double-sealed design that prevents electrolyte leakage, even in extreme temperatures or physical stress. Leakage is a common problem with traditional batteries in harsh environments, leading to equipment damage and safety hazards, but the ER26500S’s leakage-proof seal ensures that it remains intact and safe throughout its service life.

Strict Quality Control and Certification

To further ensure safety, the ER26500S is manufactured under an ISO9001-certified quality management system, with rigorous testing at every stage of production. Each battery undergoes:

• Short-circuit testing to verify that it can withstand accidental short circuits without overheating or exploding.

• Overvoltage testing to ensure it remains stable if exposed to voltage spikes.

• Temperature cycling testing to validate performance and safety across the -30℃ to +150℃ range.

• Leakage testing to confirm the integrity of the seals.

These tests, combined with compliance with international safety standards (including CE, UL, and SGS certifications), make the ER26500S one of the safest high temperature batteries available.

5. Low Self-Discharge Rate: Maximizing Service Life

For equipment that is not in constant use—such as emergency backup systems, seasonal marine equipment, or scientific research devices—a low self-discharge rate is essential. Self-discharge refers to the gradual loss of charge when a battery is not connected to a device, and it can significantly reduce a battery’s shelf life and usability.

The ER26500S LiSOCL2 battery boasts an extremely low self-discharge rate of less than 1% per year. This means that if stored properly, it will retain over 90% of its 5500mAh capacity after 10 years, and over 80% after 15 years. For oil drilling companies that stockpile batteries for emergency replacements or marine operators who use equipment seasonally, this low self-discharge rate eliminates the need to replace expired batteries, reducing waste and lowering costs.

The battery’s low self-discharge rate is attributed to the stability of LiSOCL2 chemistry, which minimizes the chemical reactions that cause charge loss. This feature, combined with its high capacity, makes the ER26500S an ideal choice for long-term standby applications where reliable power is needed after extended periods of inactivity.

6. Excellent Leakage-Proof Design: Protecting Equipment and Environments

Battery leakage is a major concern in industrial and marine applications, as it can damage expensive equipment, contaminate the environment, and pose safety risks. The ER26500S high temperature battery addresses this issue with a state-of-the-art leakage-proof design that ensures the electrolyte remains contained, even in the most challenging conditions.

The battery’s leakage-proof features include:

• A precision-engineered seal between the casing and the electrode terminals, made from high-temperature-resistant rubber that maintains flexibility and integrity across the -30℃ to +150℃ range.

• A thick layer of insulation around the internal components, preventing electrolyte seepage even if the casing is slightly damaged.

• High-quality electrolyte with a low vapor pressure, reducing the risk of pressure buildup and leakage.

We test each ER26500S battery for leakage under extreme conditions, including temperature cycling, vibration, and physical impact. These tests confirm that the battery remains leak-free, even when exposed to the rigors of oil drilling or marine operations. For equipment such as medical devices or scientific research tools, where leakage could damage sensitive components, this feature is invaluable.

Real-World Applications: Powering Critical Industries

The ER26500S LiSOCL2 high temperature battery is designed to meet the unique demands of a wide range of applications, from oil drilling and marine equipment to smart meters and medical devices. Below is a detailed look at how it performs in key industries, highlighting its ability to solve real-world challenges.

Oil Drilling Electric Equipment: Surviving Downhole Extremes

Oil drilling operations are among the most demanding environments for batteries, with downhole tools and sensors exposed to high temperatures (up to 150℃), high pressure, vibration, and corrosive drilling fluids. Traditional batteries often fail quickly in these conditions, leading to costly downtime and lost productivity.

The ER26500S high temperature battery is specifically engineered to address these challenges. Its +150℃ operating temperature tolerance ensures that it performs reliably in downhole environments, while its robust casing and leakage-proof design protect it from drilling fluids and physical damage. The battery’s 5500mAh capacity and low self-discharge rate mean that it can power downhole sensors, logging tools, and communication modules for months or even years without replacement, reducing the need for frequent well interventions.

Common oil drilling applications for the ER26500S include:

• Downhole pressure and temperature sensors: These critical devices monitor well conditions in real time, and the ER26500S’s stable voltage ensures accurate data collection.

• Drilling fluid analysis tools: These tools require consistent power to measure the properties of drilling mud, and the battery’s high temperature tolerance ensures reliable operation.

• Emergency shutdown systems: In the event of a well control issue, these systems rely on backup power to activate safety measures, and the ER26500S’s long shelf life ensures it is ready when needed.

Marine Equipment: Withstanding Saltwater and Temperature Extremes

Marine equipment operates in a harsh environment characterized by saltwater corrosion, temperature fluctuations (from -30℃ in polar regions to +50℃ in tropical waters), and constant vibration. The ER26500S LiSOCL2 battery is ideally suited for this environment, with features that address the unique challenges of marine operations.

Its corrosion-resistant stainless steel casing protects against saltwater damage, while its wide temperature range ensures performance in both frigid and warm marine environments. The battery’s low self-discharge rate is particularly valuable for seasonal marine equipment, such as fishing boats or recreational vessels, which may be stored for months at a time.

Common marine applications for the ER26500S include:

• Navigation systems: GPS, radar, and sonar devices require consistent power to ensure safe navigation, and the battery’s stable voltage delivers reliable performance.

• Communication equipment: VHF radios, emergency beacons, and satellite communication devices depend on backup power to stay operational, even in rough seas.

• Bilge pumps and safety systems: These critical systems require reliable power to prevent flooding and ensure passenger safety, and the ER26500S’s long service life reduces maintenance needs.

Smart Card Meters (Water, Electricity, Gas): Long-Term Reliability

Smart card meters are installed in homes, businesses, and industrial facilities worldwide, and they require a power source that can last for years without replacement. The ER26500S LiSOCL2 battery’s 5500mAh capacity, low self-discharge rate, and stable voltage make it the perfect choice for these applications.

Unlike alkaline batteries, which need to be replaced every 2-3 years, the ER26500S can power a smart meter for 10 years or more, reducing maintenance costs for utility companies. Its stable discharge voltage ensures accurate meter readings, while its leakage-proof design protects the meter’s internal components from damage.

Medical Equipment: Safety and Precision

Medical equipment, such as portable monitors, diagnostic tools, and emergency devices, requires a power source that is safe, reliable, and precise. The ER26500S LiSOCL2 battery meets these requirements with its excellent safety performance, stable discharge voltage, and wide temperature range.

Its low self-discharge rate ensures that emergency medical equipment, such as defibrillators or portable oxygen concentrators, remains operational when stored for extended periods. Its stable voltage delivery ensures that diagnostic tools provide accurate readings, while its safety features minimize the risk of equipment failure in critical situations.

Other Applications

In addition to the industries listed above, the ER26500S high temperature battery is also used in:

• Memory backup systems: Computers, servers, and industrial controllers rely on backup power to protect data during power outages, and the battery’s long shelf life ensures reliable backup.

• Scientific research equipment: Devices used in extreme environments, such as polar research stations or deep-sea exploration tools, benefit from the battery’s wide temperature range.

• Portable communication equipment: Two-way radios, satellite phones, and other portable devices require long-lasting power, and the ER26500S’s high capacity delivers extended usage time.

Why Choose SERUI’s ER26500S High Temperature LiSOCL2 Battery?

With so many high temperature battery and LiSOCL2 battery options on the market, why should you choose the ER26500S from SERUI Battery (www.serui-battery.com)? Our commitment to quality, innovation, and customer service sets us apart from the competition, making us a trusted partner for industries worldwide.

1. 17 Years of Expertise in Lithium Battery Manufacturing

Founded in 2004, Guangzhou Serui Battery Technology Co., Ltd. has 17 years of experience in designing and manufacturing lithium batteries, including high temperature LiSOCL2 batteries. Our team of engineers and technicians has deep expertise in battery chemistry, materials science, and manufacturing processes, allowing us to develop products that meet the most demanding industry standards.

Over the years, we have established a reputation for excellence, serving clients in oil and gas, marine, industrial, and medical sectors worldwide. Our focus on research and development ensures that we stay at the forefront of battery technology, continuously improving our products to meet evolving customer needs.

2. ISO9001-Certified Quality Management System

Quality is at the heart of everything we do, which is why we have implemented an ISO9001-certified quality management system (QMS). This system covers every stage of the manufacturing process, from raw material sourcing and product design to production, testing, and delivery.

Our QMS ensures that every ER26500S battery meets the same high standards of performance and safety, with rigorous testing at every step. We source only the highest-quality raw materials from trusted suppliers, and our production facilities feature state-of-the-art equipment that ensures precision and consistency.

3. Comprehensive Testing and Certification

The ER26500S high temperature battery has undergone extensive testing to validate its performance and safety. It is certified to meet international standards, including CE, UL, SGS, and IEC, ensuring that it is compatible with equipment worldwide.

Our testing process includes:

• Temperature cycling testing: Exposing the battery to -30℃ to +150℃ repeatedly to validate performance and stability.

• Capacity testing: Measuring the battery’s discharge capacity at different temperatures and current levels to ensure it meets the 5500mAh specification.

• Safety testing: Conducting short-circuit, overvoltage, and leakage tests to confirm the battery’s safety features.

• Environmental testing: Subjecting the battery to salt spray, vibration, and impact to simulate real-world conditions.

These tests provide our customers with the confidence that the ER26500S will perform reliably in their applications.

4. Customization Options for Unique Requirements

We understand that every customer’s needs are unique, which is why we offer customization options for the ER26500S high temperature battery. Whether you need a specific connector, wire length, or packaging, our engineering team can tailor the battery to your exact specifications.

Our customization capabilities include:

• Custom connectors: We can install JST, Molex, AMP, or other connectors to ensure seamless integration with your equipment.

• Wire harnesses: We can design and manufacture custom wire harnesses to simplify installation.

• Labeling: We can print custom labels with your company logo, product information, or safety warnings.

• Packaging: We offer custom packaging options for bulk orders, including trays, boxes, or blister packs.

Our goal is to provide a turnkey power solution that meets your unique needs, reducing time-to-market and ensuring a smooth integration process.

5. Competitive Pricing and Fast Delivery

We believe that high-quality high temperature batteries should be accessible to all industries, which is why we offer competitive pricing on the ER26500S LiSOCL2 battery. Our efficient manufacturing process, economies of scale, and direct-to-customer sales model allow us to provide exceptional value without compromising on quality.

In addition, we maintain a large inventory of ER26500S batteries, ensuring fast delivery for urgent orders. We work with trusted logistics partners to ship our products worldwide, with typical delivery times of 3-7 business days for international orders.

6. Exceptional Customer Service and Technical Support

At SERUI Battery, we are committed to providing our customers with the highest level of service. Our team of customer service representatives and technical experts is available to answer your questions, provide guidance on product selection, and offer support throughout the entire purchasing process.

Whether you need help determining if the ER26500S is the right battery for your application, require technical documentation, or need assistance with customization, we are here to help. We also offer after-sales support, ensuring that you are satisfied with your purchase long after delivery.

Conclusion: The ER26500S High Temperature LiSOCL2 Battery—Reliability in Extreme Environments

In industries where equipment operates under extreme conditions, the choice of power source can mean the difference between success and failure. The Li-SOCL2 Battery 3.6V ER26500S 5500mAh Non-rechargeable High Temperature Battery from SERUI Battery is engineered to deliver unparalleled reliability, safety, and performance in the most unforgiving environments.

With its wide operating temperature range (-30℃ to +150℃), high capacity (5500mAh), stable discharge voltage, excellent safety performance, low self-discharge rate, and leakage-proof design, it outperforms traditional batteries in every key metric. Whether powering oil drilling equipment deep underground, marine navigation systems on the open seas, or smart meters in residential buildings, this high temperature LiSOCL2 battery delivers the power and reliability that industries depend on.

Backed by 17 years of lithium battery manufacturing expertise, an ISO9001-certified quality management system, comprehensive testing and certification, customization options, competitive pricing, and exceptional customer service, SERUI Battery is your trusted partner for high temperature battery solutions.

If you are looking for a high temperature battery or LiSOCL2 battery that can withstand extreme conditions, deliver long-lasting power, and ensure the safety of your equipment, look no further than the ER26500S from SERUI Battery. Visit our website www.serui-battery.com today to learn more about our products, request a quote, or contact our technical team for personalized support. With SERUI’s ER26500S high temperature battery, you can power your critical equipment with confidence—even in the most extreme environments.