These small, disc-shaped power sources are a type of lithium coin cell battery. The designation indicates specific dimensions: “CR” signifies a lithium-manganese dioxide chemistry, “20” refers to a 20mm diameter, and “25” denotes a 2.5mm thickness. A common application is in small electronic devices, such as watches, calculators, remote controls, and key fobs.
Their widespread adoption stems from their compact size, high energy density, and long shelf life. The stable lithium chemistry allows for a slow discharge rate, enabling devices to function for extended periods. Historically, these cells represent a significant advancement in portable power, facilitating the miniaturization of electronics and improving user convenience.
The subsequent sections will detail the specific applications, voltage characteristics, safety precautions, and disposal methods associated with these ubiquitous power cells. Understanding these aspects is crucial for both consumers and manufacturers who rely on their reliable performance.
1. Lithium-manganese dioxide chemistry
Lithium-manganese dioxide (Li-MnO2) chemistry is the foundational electrochemical system underlying the functionality of the designated power cells. This chemistry dictates the cell’s voltage, energy density, and discharge characteristics, making it a critical element in its design and performance.
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Electrochemical Reaction
The battery operates based on the oxidation of lithium at the anode and the reduction of manganese dioxide at the cathode. This chemical reaction generates electrical energy, providing the voltage necessary for powering electronic devices. The stability of this reaction contributes to the battery’s long shelf life.
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Energy Density
Li-MnO2 offers a relatively high energy density for a primary (non-rechargeable) battery. This allows for a compact size while delivering sufficient power for low-drain devices. The specific energy density influences the runtime of devices powered by it.
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Voltage Stability
The battery exhibits a stable discharge voltage profile over much of its lifespan. This consistent voltage output is essential for the reliable operation of sensitive electronic components. Deviations from this stable voltage can affect device performance.
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Safety Characteristics
While generally safe under normal operating conditions, these cells require careful handling. Factors such as short-circuiting, over-discharge, and exposure to high temperatures can lead to safety hazards. Proper storage and disposal are therefore crucial.
The aforementioned facets of lithium-manganese dioxide chemistry directly influence the performance and safety profile of the power cell. Understanding these chemical properties is paramount for both manufacturers in designing reliable power solutions and consumers in utilizing these cells responsibly.
2. 3 Volts nominal voltage
The 3 Volts nominal voltage is a defining characteristic of these lithium coin cell batteries and is crucial to their functionality. This voltage output results from the specific electrochemical reaction within the cell, primarily between lithium and manganese dioxide. Without this consistent voltage level, the battery would be unsuitable for powering the vast majority of electronic devices designed to operate within this voltage range. For example, a digital watch engineered for 3V operation will not function correctly, or at all, with a power source providing significantly higher or lower voltage. This specific voltage output dictates its suitability in a device and is a key performance indicator in battery selection.
Practical applications benefiting from this 3V characteristic are widespread. Key fobs, calculators, and various remote controls rely on the stable 3V supply to operate their microcontrollers and transmit signals. Medical devices, such as glucose meters and thermometers, also depend on this consistent power to ensure accurate readings. Understanding this voltage characteristic is significant for engineers in designing electronic circuits and for consumers in selecting appropriate replacement batteries. It is also important to note that the voltage will slowly decrease over the battery’s lifespan, which will eventually affect the performance of the powered device.
In summary, the 3V nominal voltage is not merely a specification but a fundamental attribute that defines the compatibility and performance of the power cell in numerous applications. The stable voltage output is a core design factor that influences battery selection. Its long-term implications for device performance necessitate a comprehensive understanding of this critical voltage characteristic for both designers and end-users. Understanding this aspect also highlights the importance of choosing batteries from reputable manufacturers to ensure consistent voltage delivery and overall quality.
3. 20mm diameter, 2.5mm thickness
The dimensions of 20mm diameter and 2.5mm thickness are integral to defining the physical form factor of the designated power cells. The “2025” in the designation directly encodes these measurements, with “20” representing the diameter in millimeters and “25” indicating the thickness in tenths of a millimeter. This standardization is essential for ensuring interchangeability and compatibility across various devices. For example, a device engineered to accommodate this specific battery size will not function with a cell of a different diameter or thickness, regardless of its voltage or chemistry. Therefore, these dimensions are a critical component of its specification.
The adherence to the 20mm x 2.5mm standard enables a wide range of applications. These dimensions allow for the battery’s integration into compact electronic devices, such as watches, calculators, and remote controls. The standardization facilitates mass production and simplifies device design, as manufacturers can rely on the consistent dimensions when creating battery compartments and contact points. Discrepancies in either diameter or thickness would disrupt the device’s electrical circuit and mechanical fit, leading to malfunction. The dimensions directly influence battery capacity and energy density, and the industry must adhere strictly to them.
In summary, the 20mm diameter and 2.5mm thickness are not arbitrary values but fundamental parameters that determine compatibility and influence performance. They are a core aspect of the designation, guaranteeing that the cell meets specific size requirements for its intended applications. Understanding these dimensions is therefore vital for both manufacturers and end-users, ensuring proper battery selection and device operation. This dimensional consistency highlights the importance of quality control in battery manufacturing.
4. Long shelf life
The extended shelf life associated with the designated lithium coin cell batteries is a direct consequence of their lithium-manganese dioxide chemistry and construction. This characteristic enables the storage of these batteries for extended periods with minimal loss of capacity. The slow self-discharge rate, typically less than 1% per year at room temperature, contributes significantly to their longevity. Devices that are infrequently used, such as remote controls or emergency backup systems, benefit substantially from this feature. For instance, a smoke detector powered by it may remain functional for several years before requiring battery replacement. This exemplifies the practical significance of a long shelf life.
The low self-discharge rate is attributed to the stable nature of the lithium-manganese dioxide electrochemical system. The internal chemical reactions that gradually deplete the battery’s energy are minimal, allowing the cell to retain a substantial charge even after years of storage. This becomes particularly important in applications where immediate availability of power is crucial, such as in medical devices or security systems. Furthermore, the long shelf life reduces the frequency of battery replacements, minimizing both the cost and environmental impact associated with battery disposal. The reliable energy source after prolonged storage is a vital feature.
In conclusion, the long shelf life is a crucial attribute of these power cells, resulting from their specific chemical composition and design. This characteristic ensures that devices remain powered and ready for use, even after prolonged periods of storage. It also minimizes the need for frequent replacements, contributing to both economic and environmental benefits. An appreciation for this extended shelf life is therefore essential for users seeking reliable and cost-effective power solutions. Selecting batteries with recent manufacturing dates is still advisable to maximize their operational lifespan.
5. Low self-discharge
The property of low self-discharge is a critical attribute of the lithium coin cell battery. This characteristic refers to the minimal loss of stored energy when the battery is not actively powering a device. The lithium-manganese dioxide chemistry employed in these batteries inherently exhibits a slow rate of self-discharge, typically around 1-2% per year at room temperature. This results in a prolonged shelf life and ensures that the battery retains a significant portion of its capacity even after extended periods of storage. For example, a calculator left unused for several years will likely still power on due to this minimal energy loss. This capability sets these batteries apart from other chemistries that exhibit significantly higher self-discharge rates.
The implications of low self-discharge are significant across various applications. In devices with intermittent or infrequent usage, such as remote controls, key fobs, or infrequently used medical devices, this characteristic is particularly valuable. It guarantees that the device will be operational when needed, even after prolonged inactivity. This reduces the need for frequent battery replacements and enhances the overall reliability of the powered device. Furthermore, the extended shelf life translates to lower replacement costs and reduced environmental impact through decreased battery waste. The benefit also enables manufacturers to confidently incorporate these cells into products requiring extended standby performance.
In conclusion, the low self-discharge rate is not merely a minor specification but a fundamental property that contributes substantially to the performance and usability of the lithium coin cell battery. It ensures long-term availability of power, reduces replacement frequency, and enhances device reliability. Understanding this attribute is crucial for both consumers and manufacturers seeking dependable and cost-effective power solutions. This inherent stability within the cell’s chemistry is a primary factor in their widespread adoption across diverse applications.
6. Wide operating temperature
The wide operating temperature range exhibited by the designated lithium coin cell batteries is a critical performance parameter influencing their suitability for diverse applications. This characteristic defines the range of ambient temperatures within which the battery can reliably deliver power without significant degradation in performance or safety. Understanding this range is paramount for ensuring proper device function across varied environmental conditions.
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Performance Limits
The specified operating temperature range, typically spanning from -30C to +60C, represents the boundaries within which the battery maintains its nominal voltage and capacity. Exceeding these temperature limits can result in reduced performance, including decreased voltage output, diminished capacity, and accelerated self-discharge. Operation outside these limits may also compromise safety, potentially leading to electrolyte leakage or, in extreme cases, thermal runaway.
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Application Scenarios
The wide operating temperature range enables the use of these batteries in devices exposed to fluctuating or extreme temperatures. Examples include outdoor sensors, automotive key fobs, and medical devices used in varying climates. In these applications, the ability to function reliably across a broad temperature spectrum is essential for ensuring consistent performance and data integrity. Devices operating in colder climates require the ability to provide adequate power despite decreased ion mobility within the battery at low temperatures.
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Internal Resistance
Temperature significantly influences the internal resistance of the battery. At lower temperatures, internal resistance increases, which can limit the current delivery capability. Conversely, at higher temperatures, internal resistance decreases, potentially leading to increased self-discharge and accelerated degradation of the battery’s components. Manufacturers design these batteries to mitigate these effects within the specified operating temperature range.
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Electrolyte Stability
The stability of the electrolyte solution within the battery is crucial for maintaining performance across the operating temperature range. Extreme temperatures can cause the electrolyte to freeze, boil, or decompose, thereby compromising the battery’s ability to generate electricity. The selection of appropriate electrolyte materials with suitable thermal properties is therefore essential for ensuring reliable operation across a wide temperature range.
The interplay between operating temperature and battery performance underscores the importance of selecting batteries that meet the specific environmental requirements of the intended application. Failure to consider the operating temperature range can lead to device malfunction, reduced battery lifespan, and potential safety hazards. The wide operating temperature range enhances the versatility of the lithium coin cell battery, making it suitable for a broad spectrum of applications across diverse environmental conditions.
7. Button cell shape
The button cell shape is an essential characteristic of batteries, including the CR2025. This shape, resembling a small button or coin, is not merely aesthetic but directly contributes to the functional attributes. The circular form factor optimizes the surface area-to-volume ratio, enabling efficient energy storage within a compact space. This design facilitates integration into small electronic devices, a primary application for such cells. Deviation from this standardized shape would compromise compatibility and hinder their use in intended applications. The button shape is dictated by the manufacturing process and optimized for volumetric efficiency. For example, a wristwatch relies on this compact form to fit seamlessly within its design constraints. This dictates the overall design of the device itself.
The selection of the button cell shape directly influences the battery’s performance characteristics, including its discharge rate and overall capacity. The circular design allows for a uniform distribution of the active materials, ensuring a consistent electrochemical reaction during discharge. In devices such as remote controls and calculators, this uniform discharge contributes to a stable voltage output, critical for reliable operation. The shape also facilitates efficient heat dissipation, preventing localized overheating that could degrade battery performance or safety. The button cell design simplifies the manufacturing process. The shape ensures consistency and aids in automated assembly lines, resulting in mass production at lower cost.
In summary, the button cell shape is inextricably linked to the functionality and applicability of the CR2025 battery. Its compact size, efficient energy storage, and facilitated integration into small electronic devices make it an indispensable component. Understanding this relationship is crucial for both designers seeking to incorporate these batteries into their products and consumers seeking to replace them. The specific shape is not simply a matter of form but one of functional necessity and optimized performance. Challenges in alternative form factors would likely emerge in the mass manufacturing of compatible devices.
8. Non-rechargeable
The inherent non-rechargeable nature defines a fundamental characteristic of the lithium coin cell battery. Unlike secondary batteries, these cells are designed for single use, after which they must be properly discarded. This limitation dictates their applications and necessitates careful consideration during device design and usage.
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Single-Use Chemistry
The lithium-manganese dioxide chemistry is optimized for a one-time discharge. Attempting to recharge can lead to potentially hazardous situations, including electrolyte leakage, internal short-circuiting, or even thermal runaway. The internal chemical reactions are not designed to be reversed through the application of external current. For example, attempting to recharge them using a standard battery charger is inadvisable.
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Device Design Implications
The non-rechargeable nature influences the design of devices that incorporate these batteries. Manufacturers must consider battery life expectancy and design for ease of replacement. This may involve easily accessible battery compartments or low-power operating modes to extend battery life. Therefore, device design must carefully consider the power consumption.
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Cost Considerations
While the individual cost may be relatively low, the non-rechargeable nature necessitates periodic replacements. Over the lifespan of a device, the cumulative cost of replacing these single-use batteries can exceed the cost of rechargeable alternatives. This factor requires evaluation in the context of overall device cost and usage patterns. This is especially evident in frequently used devices.
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Environmental Responsibility
The non-rechargeable characteristic emphasizes the importance of responsible disposal practices. These batteries contain materials that can be harmful to the environment if improperly discarded. Proper disposal channels, such as battery recycling programs, must be utilized to minimize their environmental impact. Therefore, consumers must be educated about proper disposal methods.
The implications of its non-rechargeable nature extend across various aspects, from chemical design and device integration to cost analysis and environmental concerns. A comprehensive understanding of this limitation is essential for both manufacturers and end-users to ensure safe and responsible use of these ubiquitous power cells. Understanding this limitation enables responsible environmental stewardship.
9. Device power solution
The ubiquitous lithium coin cell serves as a primary power solution for a vast array of compact electronic devices. Its compact size, stable voltage, and long shelf life make it particularly well-suited for applications where space and reliability are paramount.
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Compact Electronics Enabler
The dimensions of these cells facilitate the miniaturization of electronic devices. Examples include key fobs, calculators, and wearable sensors, where the small form factor is essential. Without compact power sources like these cells, the functionality and portability of these devices would be severely limited.
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Essential Component in Low-Power Devices
Devices requiring minimal current draw benefit significantly from the stable voltage and low self-discharge. Remote controls, watches, and medical monitors exemplify this, where the battery can last for extended periods without frequent replacement. This stability ensures reliable operation over the battery’s lifespan.
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Backup Power Applications
In certain applications, it provides a backup power source to maintain critical data or settings during primary power outages. Real-time clocks and memory backup systems in computers utilize it for this purpose, safeguarding data integrity and continuous functionality.
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Medical Device Power Source
These are used in variety of Medical devices, ranging from thermometers to wearable health monitors, demand a reliable and consistent power source. It meets these requirements with its stable voltage output and long shelf life, ensuring accurate readings and device functionality over extended periods. For example, in glucose meters, the accurate readings are critical, and it supports that accuracy.
These aspects highlight the fundamental role as a device power solution, enabling a broad spectrum of electronic applications. The combination of compact size, stable voltage, and long life makes it an ideal choice for powering small, low-power devices and ensuring their reliable operation.
Frequently Asked Questions about cr 2025 batteries
The following questions address common inquiries and misconceptions regarding this type of lithium coin cell battery. Understanding these points ensures proper usage and safety.
Question 1: Can it be recharged?
It is explicitly a non-rechargeable battery. Attempting to recharge it poses a significant safety hazard, potentially leading to leakage, explosion, or fire.
Question 2: What is the expected lifespan?
Lifespan depends on the device and usage patterns. Under typical usage, it may last for several years in low-drain devices like watches or remote controls. Shelf life is also considerable, with minimal self-discharge.
Question 3: How should it be stored?
It should be stored in a cool, dry place, away from direct sunlight and extreme temperatures. It should be kept out of reach of children to prevent accidental ingestion.
Question 4: What is the correct disposal method?
Dispose of used batteries responsibly through designated recycling programs. These batteries contain materials that can be harmful to the environment if improperly discarded.
Question 5: What is the voltage?
It has a nominal voltage of 3 volts. This voltage is crucial for compatibility with devices designed to operate within this specific range.
Question 6: Where can it be used?
It is suitable for a wide array of small electronic devices, including watches, calculators, remote controls, key fobs, and medical devices. Ensure that the device specifications call for this specific battery type.
These FAQs emphasize the importance of responsible usage, storage, and disposal practices. Always consult the device manufacturer’s recommendations for optimal battery performance and safety.
The next section will address safety precautions and potential hazards associated with these types of batteries.
Tips
These tips provide guidelines for optimal use, safety, and longevity. Adhering to these recommendations maximizes performance and minimizes risks associated with usage.
Tip 1: Verify Compatibility Prior to Installation: Confirm device compatibility before inserting a battery. Consult the device’s manual or manufacturer’s specifications to ensure that the battery type matches the equipment requirements. This practice prevents damage to the device and ensures proper functionality.
Tip 2: Maintain Correct Polarity: When installing, observe the correct polarity (+ and -). Incorrect installation can result in device malfunction and potential damage. The polarity markings are typically indicated on both the battery and the device.
Tip 3: Avoid Mixing New and Used: Replace all batteries simultaneously. Combining new and used cells can lead to uneven discharge and reduced performance. This minimizes the risk of leakage and maximizes overall battery life.
Tip 4: Store Properly in a Cool, Dry Environment: Store unused batteries in a cool, dry environment, away from direct sunlight and extreme temperatures. This prolongs shelf life and prevents premature degradation. Protect from humidity.
Tip 5: Keep Away from Children and Pets: Ensure that batteries are kept out of reach of children and pets. Ingestion can cause serious internal injuries. Seek immediate medical attention if ingestion occurs.
Tip 6: Adhere to Proper Disposal Methods: Dispose of used batteries through designated recycling programs. Improper disposal contributes to environmental contamination. Check local regulations for proper disposal guidelines.
Tip 7: Prevent Short Circuits: Avoid contact with metal objects that may cause short circuits. This can lead to rapid discharge, overheating, and potential hazards. Store batteries in a manner that prevents contact with conductive materials.
These tips highlight essential practices for safe and effective utilization, encompassing compatibility verification, correct installation, and responsible disposal. These practices contribute to maximizing battery performance while prioritizing user safety.
The subsequent section will summarize the essential aspects discussed throughout this article, emphasizing the significance.
Conclusion
This exploration has detailed the attributes of lithium coin cell batteries, examining their chemical composition, dimensional specifications, performance characteristics, and application scenarios. The discussion underscored the importance of adhering to safety guidelines and proper disposal methods, given the potential hazards associated with improper handling. This article has provided clarity on the role of this battery type.
Therefore, a comprehensive understanding of the battery is crucial for both manufacturers designing electronic devices and consumers utilizing these power sources. Responsible use, storage, and disposal practices are paramount to ensuring safety and minimizing environmental impact. Future research and development may focus on enhancing battery performance, extending lifespan, and promoting sustainable disposal solutions.
