Button Battery Sizes: A Comprehensive Guide to Convenience

Ever struggled to find the right button battery for your watch, car key fob, or remote? With so many tiny batteries out there—CR2032, LR44, SR621, PR41—it can feel like decoding a secret language! But don’t worry, we’ve got you covered. Whether you need a long-lasting lithium coin cell, a precise silver oxide battery, or a reliable alkaline option, this guide will help you understand button battery sizes so you can pick the perfect one for your device. Let’s dive in!

What is Button Battery?

Coin cell batteries, sometimes called button batteries, are tiny, spherical batteries. Coin call batteries are found in various electronic devices, including remote controls, calculators, and watches. They have different sizes, and each has a name. Selecting the appropriate battery for your device can be easier if you know the various sizes and their uses. This is a comprehensive guide on button battery sizes.

If you want to know about the best car battery for optimal performance, let’s have a quick view before we get to the button battery sizes.

Understanding Button Battery Naming Conventions

Most button batteries follow an alphanumeric naming system, which typically consists of:

• Two letters (e.g., CR, LR, SR) indicating the battery chemistry
• Four digits (e.g., 2032) where:
  • The first two digits represent the diameter in millimeters
  • The last two digits represent the height in tenths of a millimeter

For example, a CR2032 battery is 20mm in diameter and 3.2mm thick. Here are some of the standard battery sizes.

Common Button Battery Types and Sizes

Lithium Coin Cell Batteries (CR Series)

• Chemistry: Lithium Manganese Dioxide (3V)
• Common Sizes:
  • CR2032 (20mm x 3.2mm) – Used in car key fobs, calculators, and motherboards
  • CR2025 (20mm x 2.5mm) – Found in remotes and medical devices
  • CR2016 (20mm x 1.6mm) – Used in slim electronics like watches
  • CR2450 (24.5mm x 5.0mm) – High-capacity, used in medical devices
  • CR1632 (16mm x 3.2mm) – Common in fitness trackers
  • CR1220 (12mm x 2.0mm) – Used in small electronics

 Alkaline Button Batteries (LR Series)

• Chemistry: Alkaline (1.5V)
• Common Sizes:
  • LR44 (AG13, A76) – Used in toys, calculators, and small gadgets
  • LR43 (AG12) – Found in thermometers and small LED lights
  • LR41 (AG3) – Used in hearing aids and digital thermometers
  • LR626 (AG4) – Found in wristwatches

Silver Oxide Button Batteries (SR Series)

• Chemistry: Silver Oxide (1.55V)
• Common Sizes:
  • SR44 (357, AG13, SG13) – Used in cameras, watches, and medical instruments
  • SR41 (392, AG3) – Found in glucose monitors and watches
  • SR621 (364, AG1) – Used in small digital devices

Zinc-Air Batteries (PR Series)

• Chemistry: Zinc-Air (1.4V, mostly for hearing aids)
• Common Sizes:
  • PR44 (675) – Larger hearing aids
  • PR48 (13) – Used in behind-the-ear hearing aids
  • PR41 (312) – Common in in-ear hearing aids
  • PR70 (10) – Smallest size for hearing aids

Best Coin Batteries: Few Top Picks

1.LR44 / AG13 / A76 Battery

• Diameter: 11.6 mm
• Height: 5.4 mm
• Voltage: 1.5 volts

The LR44, AG13, and A76 refer to the same kind of button cell battery. They are frequently found in various small electronic gadgets. These batteries are well-liked because of their small size, dependable operation, and adaptability to various uses.

Characteristics

• One of the main characteristics of LR44/AG13/A76 batteries is their small size.
• They are compact, round, disc-shaped batteries that belong to the button battery family.
• Devices with limited space, like watches, calculators, key chains, toys, and tiny electrical devices, frequently use these batteries.
• Their small size allows them to supply devices with power without significantly increasing bulk or weight.

Different labels for the LR44/AG13/A76 batteries are frequently used, depending on the industry norms. The International Electrotechnical Commission (IEC) standard frequently uses the identifier LR44. Although the American National Standards Institute (ANSI) standard more frequently uses AG13. The battery type in question is also known by the model number A76. Despite having distinct labeling, they all have the same specs and may be used interchangeably in most applications.

Batteries such as LR44/AG13/A76 are renowned for their dependable performance as power sources. They can supply a steady voltage despite their small size, making them appropriate for powering various equipment. The normal operating voltage of these batteries is 1.5 volts, which is adequate to power various small electrical devices.

Standard button battery sizes, such as LR44/AG13/A76, guarantee compatibility between various gadgets. Customers no longer have to worry about incompatibilities while searching for replacement batteries for their gadgets due to this standardization. One of the most popular groups of button cell battery sizes is 11.6 mm diameter by 5.4 mm height, which includes the LR44/AG13/A76 batteries.

2. CR2032 Battery

• Diameter: 20 mm
• Height: 3.2 mm
• Voltage: 3 volts

Charactersitics

• Popular button cell batteries of the CR2032 variety are well-known for their small size, strong energy density, and dependability.
• They function by means of the electrochemical reaction between manganese dioxide and lithium, and they are a member of the lithium button battery family. This reaction frequently involves silver oxide chemistry.
• These batteries are commonly used in a wide range of electronic devices, including small electronic gadgets, medical equipment, wristwatches, and calculators.
• It stand out as the best in the button battery sizes .

The CR2032 button battery is distinguished by its uniform dimensions, which adhere to the extensively recognized International Electrotechnical Commission (IEC) button battery specifications. A cylindrical cell is indicated by the “CR” designation, its diameter in millimeters (20mm) by the “20” designation, and its thickness (3.2mm) by the “32” designation. This uniform sizing guarantees interoperability with a wide variety of gadgets made to accept button cells.

Silver oxide chemistry improves the performance and longevity of CR2032 batteries. Silver oxide batteries are perfect for devices that need steady power delivery since they provide a consistent voltage output throughout their life. They also have a comparatively high energy density, which allows them to fit a lot of power into a little form factor.

CR2032 batteries are the perfect choice for applications where space is at a premium due to their compact dimensions. Their round, flat design makes integrating them smoothly into electronic circuitry possible without significantly increasing their weight or thickness. This is a handy feature for portable devices when weight and compactness play essential factors.

Shelf Life

Apart from their small size and dependable operation, CR2032 batteries are renowned for having a longer shelf life. When stored properly, they can hold their charge for several years, so they’re always ready to go. Because of their lengthy lifespan, they are an excellent option for backup power in gadgets that are used seldom or infrequently.

CR2032 batteries are modest in size but have a lot of power, providing steady voltage output and dependable performance for a long time. Because of their small size, high energy density, and silver oxide chemistry, lithium button cells are still an essential component in the field of portable electronics, whether they are used as backup power sources or to power common devices.

3.CR2025 Battery

• Diameter: 20 mm
• Height: 2.5 mm
• Voltage: 3 volts

In the world of electronics, the CR2025 is a small but powerful part, frequently regarded as the unsung hero of countless gadgets that depend on a consistent and dependable power supply. It is the pinnacle of simplicity and efficiency in a button cell battery, supplying vital energy to various devices and instruments.

Characteristics

• The CR2025’s button battery sizes is one of its distinguishing characteristics. Despite its modest size.just 20 mm in diameter and 2.5 mm in thickness. This little powerhouse is mighty powerful.
• Due to its small size, it is ideal for various items when space is limited, such as medical equipment, remote controls, key fobs, and calculators.
• However, CR2025’s real value is found in its capacity to supply dependable power, not just its size.
• Users can rely on CR2025 to maintain their gadgets operating at peak performance for extended periods, whether powering a digital thermometer or a tiny handheld gaming device.

This dependability is essential, particularly in applications where an unexpected power outage could have serious repercussions. In addition, the CR2025 has a long shelf life. Making it a great option for gadgets that might be left unused for extended periods. This feature saves you the frustration of dealing with a dead power supply by guaranteeing that the battery will be ready and waiting when it’s time to leap into action.

The significance of dependable power cannot be emphasized in the fast-paced world we live in today, where technology influences every part of our existence. The CR2025 provides a stable energy solution in a small and handy size, fulfilling this necessity. Because of their adaptability and durable performance, button cell batteries are a mainstay in the industry, powering gadgets of all sizes with dependable efficiency. The CR2025 remains a dependable option in the rapidly changing world of contemporary technology, whether powering a complex electronic device or illuminating a watch face.

CR2016 Battery

• Diameter: 20 mm
• Height: 1.6 mm
• Voltage: 3 volts

Characteristics

• The coin cell battery CR2016 is a compact, flat, round battery that is frequently used in various electronic devices. Including small gadgets, watches, calculators, and remote controls.
• It belongs to the group of button batteries, distinguished by their small size and form.

Choosing the Right Button Battery

• Match the size and voltage – Using the wrong size or chemistry can damage your device.
• Lithium (CR) lasts longer – Ideal for memory backup and low-drain devices.
• Silver oxide (SR) is more stable – Used in precise applications like watches.
• Zinc-air (PR) is for hearing aids – Activated by air when unsealed.

Conclusion

Selecting the right button battery size doesn’t have to be confusing. By understanding the naming system, chemistry, and voltage, you can ensure your devices run smoothly without interruptions. Whether you need a long-lasting lithium (CR series), a stable silver oxide (SR series), a cost-effective alkaline (LR series), or a hearing aid-specific zinc-air (PR series) battery, choosing the right one makes all the difference.

Next time you need a replacement, check the battery code and match it correctly to avoid performance issues. A little knowledge goes a long way in keeping your gadgets powered up and ready to go!