My Request:0Part

Home > Blog > CR2032 lithium-ion battery: multi-scenario applications and its unique advantages

CR2032 lithium-ion battery: multi-scenario applications and its unique advantages

The CR2032 battery, a commonly used coin-shaped lithium-ion battery, is essential in many low-power electrical products such as digital watches and pocket lights, with a diameter of 20 mm and a thickness of 3.1 mm. It frequently serves as a backup power source for applications like computer BIOS or maintaining the real-time clock in static devices. This battery is distinguished by its unique physical and electrochemical properties, making it invaluable in various application scenarios.

Composition and Structural Features of CR2032 Battery

Classified as a lithium manganese dioxide battery (LiMnO2) under the international electrochemical nomenclature system, the CR2032 is composed of a positive electrode made from manganese dioxide (MnO2) and a negative electrode made of lithium. It offers a rated capacity of 225 milliamp hours (mAh) and operates stably within a temperature range of -20ºC to +70ºC. There's also a carbon monofluoride lithium battery, BR2032/5004LB, with similar performance characteristics to the CR2032.

The CR2032's stainless steel outer shell prevents electrolyte leakage. With a low self-discharge rate, it promises a long storage life. Even after prolonged dormancy, the battery retains a charge close to its original value.

These batteries are crucial in powering ultra-low power subsystems like real-time clocks and oscillators, which must continue running even when the main device powers down. Typically, these subsystems draw power from the device's main source when on, conserving the CR2032 battery's energy. The longevity and stability of this battery often result in devices becoming outdated due to technological advancements rather than battery exhaustion.

Analysis of the Service Life for CR2032 Battery

The life of a CR2032 battery depends on the balance between its total power and current consumption. In cases where the current draw is minimal (e.g., less than 1 microamp), the battery can last for over a decade. However, higher current demands, either continuous or pulsed, can significantly shorten its lifespan.

For instance, a CR2032 battery delivering a steady 0.5mA (500 microamps) will function up to 240mAh before the voltage falls to 1.6V. If the current requirement increases to 3.0mA, it can only supply 155mAh. The battery life is shortened not just by increased consumption but also by the resultant voltage drop, which can disrupt circuit operation.

Even under optimal conditions, the battery's 225mAh capacity is compromised by pulse current demands, posing design challenges for devices supporting technologies like Bluetooth. Designers must carefully consider and plan for this battery characteristic.

Additionally, CR2032 batteries demonstrate robust resistance to temperature fluctuations. For example, Panasonic's CR-2032L/BN battery operates effectively within a -30°C to +60°C range, maintaining consistent performance until the output voltage declines from 3V to 2V.

CR2032 Battery: Installation Precautions and Main Selection Considerations

When soldering the CR2032 battery to a PCB board, it's crucial to be cautious with the heat transferred to the battery. Overheated lithium-ion batteries can be a serious explosion hazard. Often, manufacturers equip these batteries with solder tabs to prevent the direct application of heat.

Alternatively, a battery holder may be used, though this increases costs. This option is considered when it's likely that batteries will need replacement over the lifespan of the device. Manufacturers weigh the costs and ease of use when deciding whether to adopt a battery holder in their design.

In the design phase, several key factors should be considered when selecting CR2032 batteries:

Does the device need to operate at very low power?

Is there a possibility of needing to replace the battery during the product's lifetime?

Is the current demand from the battery on the device continuous, intermittent, or pulsing?

Will the design include a battery holder, or will the battery be soldered to the PCB?

Does the device require an alarm feature or a timing system that operates even in sleep mode?

future development trend

The lithium-ion battery technology sector continues to receive substantial investment and research efforts. Advancements in technology suggest that CR2032 batteries will gain more power capacity and offer significantly longer service times. These developments will enhance design flexibility and energy efficiency across various devices. As these improvements materialize, CR2032 batteries are expected to contribute significantly to the advancements in future designs of diverse electronic devices.

Related Blog

Fundamentals of Op-Amp Circuits
December 28th, 2023
~~In the intricate world of electronics, a journey into its mysteries invariably leads us to a kaleidoscope of circuit components, both exquisite and co...~~
How Many Zeros in a Million, Billion, Trillion?
July 29th, 2024
~~Million represents 106, an easily graspable figure when compared to everyday items or annual salaries. Billion, equivalent to 109, starts to stretch t...~~
Comprehensive Guide to SCR (Silicon Controlled Rectifier)
April 22th, 2024
~~Silicon Controlled Rectifiers (SCR), or thyristors, play a pivotal role in power electronics technology because of their performance and reliability. ...~~
CR2032 lithium-ion battery: multi-scenario applications and its unique advantages
January 25th, 2024
~~The CR2032 battery, a commonly used coin-shaped lithium-ion battery, is essential in many low-power electrical products such as digital watches and po...~~
NPN and PNP Transistors
December 28th, 2023
~~For exploring the world of modern electronic technology, understanding the basic principles and applications of transistors is essential. Although the...~~
What is a thermistor
December 28th, 2023
~~In the realm of modern electronic technology, delving into the nature and working mechanism of thermistors becomes a crucial endeavor. These precision...~~
Explore the Difference Between PCB and PCBA
April 16th, 2024
~~A PCB serves as the backbone of electronic devices. Made from a non-conductive material, it physically supports components while also connecting them ...~~
BC547 Transistor Comprehensive Guide
July 4th, 2024
~~The BC547 transistor is commonly used in a variety of electronic applications, ranging from basic signal amplifiers to complex oscillator circuits and...~~
What Is A Solenoid Switch
December 26th, 2023
~~When an electrical current flows through the coil, the resulting magnetic field either attracts or repels the iron core, causing it to move and either...~~
IRLZ44N MOSFET Datasheet, Circuit, Equivalent, Pinout
August 28th, 2024
~~The IRLZ44N is a widely-used N-Channel Power MOSFET. Renowned for its excellent switching capabilities, it is highly suited for numerous applications,...~~