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Views: 0 Author: Site Editor Publish Time: 2026-09-08 Origin: Site
The CR2032 3V coin cell battery is one of the most widely used lithium coin batteries for compact electronic devices. Its small size, stable voltage, long shelf life, and reliable performance make it a popular power source for products such as watches, calculators, remote controls, medical devices, sensors, and memory backup systems.
But what does “CR2032” actually mean? What are the standard dimensions and capacity of a CR2032 battery? And which applications are best suited to this type of coin cell?
This article provides a practical overview of the CR2032 battery and its key characteristics.
CR2032 is a 3V lithium manganese dioxide (Li-MnO₂) coin cell battery. It is designed primarily for devices that require a compact, lightweight, and relatively low-current power source.
The name “CR2032” describes the battery's basic physical dimensions:
C – Lithium chemistry designation
R – Round shape
20 – Approximately 20 mm in diameter
32 – Approximately 3.2 mm in thickness
A standard CR2032 battery therefore has a diameter of approximately 20 mm and a thickness of approximately 3.2 mm.
The exact specifications can vary between manufacturers and product designs, but typical CR2032 batteries have the following characteristics:
Parameter | Typical Specification |
|---|---|
Battery Type | Lithium Coin Cell |
Chemistry | Lithium Manganese Dioxide (Li-MnO₂) |
Nominal Voltage | 3.0V |
Diameter | Approx. 20 mm |
Thickness | Approx. 3.2 mm |
Capacity | Typically around 200–240 mAh |
Shape | Round / Coin |
Rechargeable | No |
Operating Temperature | Depends on manufacturer and application |
The actual capacity depends on factors such as discharge current, operating temperature, cutoff voltage, and testing conditions. Therefore, when comparing CR2032 batteries from different suppliers, it is important to check the specified test conditions, rather than comparing capacity figures alone.
A typical CR2032 battery has a nominal capacity of approximately 200–240 mAh, depending on the manufacturer and testing conditions.
However, the rated capacity does not mean that every application will obtain exactly the same amount of usable energy. Battery performance can be affected by:
Continuous or pulse discharge current
Operating temperature
Device cutoff voltage
Storage conditions
Battery age
Load characteristics
For low-power applications, a CR2032 can provide a long operating time because its self-discharge rate is relatively low.
The CR2032 has several characteristics that make it suitable for compact electronic products.
With a diameter of about 20 mm and a thickness of about 3.2 mm, the CR2032 provides a useful balance between physical size and energy capacity.
The nominal voltage of 3V makes CR2032 batteries suitable for many low-power electronic circuits and devices.
Lithium coin cells generally have a long storage life when properly manufactured and stored. This is particularly useful for products that may remain unused for extended periods.
The compact construction and relatively low weight make CR2032 batteries suitable for portable and space-constrained devices.
CR2032 batteries are particularly well suited to devices that consume a small amount of current continuously or require occasional pulse current.
CR2032 batteries are used across a wide range of consumer electronics, industrial products, and smart devices.
CR2032 batteries are commonly used as backup power sources for memory and real-time clock circuits in computers and other electronic equipment.
Many vehicle key fobs and small remote-control devices use CR2032 batteries because they require a compact power source capable of supporting low-power operation and intermittent pulses.
The small dimensions and stable voltage of CR2032 batteries make them suitable for certain digital watches, clocks, and timers.
Some compact medical and healthcare electronics use coin cell batteries to achieve a small overall product size. Battery selection should always be based on the device manufacturer's electrical and safety requirements.
Wireless sensors, monitoring devices, trackers, and other low-power IoT products can use CR2032 batteries when the required energy consumption and communication duty cycle are compatible with the battery's discharge characteristics.
CR2032 batteries are also commonly found in calculators, electronic scales, thermometers, toys, LED products, and other compact electronic devices.
CR2032 is part of a broader family of lithium coin cells. Batteries such as CR2016 and CR2025 have the same approximate 20 mm diameter but different thicknesses.
Battery Model | Diameter | Thickness | Typical Capacity |
|---|---|---|---|
CR2016 | 20 mm | 1.6 mm | Around 90 mAh |
CR2025 | 20 mm | 2.5 mm | Around 160–170 mAh |
CR2032 | 20 mm | 3.2 mm | Around 200–240 mAh |
Although these batteries may appear similar, they should not automatically be considered interchangeable. The battery compartment, contact pressure, device voltage requirements, available space, and expected discharge characteristics all need to be considered.
When sourcing CR2032 batteries for a commercial product, it is important to look beyond nominal voltage and capacity.
Consider the following factors:
1. Capacity: Choose a capacity that meets the required operating time.
2. Discharge characteristics: Check whether the battery can handle the device's continuous and pulse current requirements.
3. Operating temperature: Make sure the battery's specified temperature range matches the application environment.
4. Physical dimensions: Confirm that the battery fits the device's battery compartment.
5. Shelf life: This is especially important for products that may be stored for long periods before use.
6. Packaging: Bulk, blister, card, or other packaging options can be selected according to the product and sales channel.
7. Quality and consistency: For mass production, stable electrical performance and batch-to-batch consistency are particularly important.
Although the basic CR2032 cell size is standardized, suppliers can often provide different packaging and connection options for specific applications.
Depending on the project, customization may include:
Custom packaging
Blister card packaging
Private labeling
Tabs or solder terminals
Wires and connectors
Customized battery holders or assemblies
For OEM and bulk purchasing projects, customers should provide the required quantity, application, packaging requirements, and technical specifications so that the appropriate battery solution can be evaluated.
The CR2032 3V coin cell battery offers a practical combination of compact size, stable voltage, reliable performance, and long storage life. These characteristics make it a popular choice for low-power electronic devices ranging from computer backup systems and remote controls to sensors, watches, medical equipment, and IoT products.
When selecting a CR2032 battery, capacity is only one factor to consider. Dimensions, discharge requirements, operating temperature, shelf life, packaging, and application conditions should also be evaluated to ensure reliable long-term performance.
For OEM and wholesale projects, working with an experienced battery supplier can help ensure that the selected CR2032 battery matches the electrical and mechanical requirements of the final product.
