Understanding Coin Battery Sizes

Introduction to Coin Batteries

Have you ever wondered what the numbers on your coin cell battery mean? In this blog, we will break down the meaning behind those numbers. Coin batteries are essential for various small electronic devices, and understanding their sizes can help you choose the right one for your needs.

Amazon Basics 4-Pack CR2032 Lithium Coin Cell Battery, 3 Volt, Long Lasting Power, Mercury-Free
  • Plastic, Metal
  • Imported
  • IN THE BOX: 4-pack of CR2032 3 volt lithium coin cell batteries; replacement for BR2032, DL2032, and ECR2032

What Do the Letters and Numbers Mean?

Let’s take the most common coin cell battery, the CR2032, as an example. The letters “CR” stand for lithium manganese dioxide. While you don’t need to remember this for everyday use, it’s good to know what it represents. The crucial part is understanding the numbers that follow.

First Two Numbers: Diameter

The first two numbers indicate the battery’s diameter in millimeters. For example, in a CR2032 battery, the “20” means it has a 20 mm diameter. This measurement helps you understand the size of the battery in terms of width.

Last Two Numbers: Thickness

The last two numbers show the battery’s thickness, but with a twist. These numbers represent the thickness in tenths of a millimeter. So, in the case of a CR2032 battery, the “32” means it is 3.2 mm thick. Understanding this can help you choose a battery that fits snugly into your device.

Comparing Different Coin Batteries

Now that we understand how to read the battery sizes, let’s compare different coin batteries to see the variations in their dimensions.

CR2032 vs. CR1632

Comparing a CR2032 with a CR1632, you can see that the CR1632 has a smaller diameter. The CR1632 has a 16 mm diameter versus the 20 mm diameter of the CR2032. However, both have the same thickness of 3.2 mm. This makes them interchangeable in some devices where the thickness is more critical than the diameter.

Amazon Basics 4-Pack CR1632 Lithium Coin Cell Battery, 3 Volt, Long Lasting Power, Mercury-Free
  • IN THE BOX: 4-pack of CR1632 3-volt lithium coin cell replacement batteries for small electronic devices
  • DEVICE COMPATIBLE: Ideal for watches, calculators, games, medical devices, and more
  • LONG LASTING: Long-lasting, reliable battery life; performs in extreme temperatures

CR2450: A Larger Coin Battery

When you look at a larger coin battery like the CR2450, you’ll notice it has a wider diameter and is thicker than the CR2032. The CR2450 has a 24 mm diameter and is 5.0 mm thick. This makes it suitable for devices that require a larger battery with more capacity.

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Energizer Lithium Coin Blister Pack Watch/Electronic Batteries, 1 Count (Pack of 2)
  • Pack of 2 batteries
  • Lithium coin batteries for watches and electronic devices
  • Has a power of 3 volts

Interchangeability of Coin Batteries

Sometimes, you can use a slightly thicker or thinner battery in place of another, especially in key fobs. For instance, a CR1616 battery has the same diameter as a CR1620, but the latter is slightly thicker. In some cases, you can use a CR1620 in place of a CR1616 if it fits into the device.

Sale
Panasonic CR1620 3.0 Volt Long Lasting Lithium Coin Cell Batteries in Child Resistant, Standards Based Packaging, 4-Battery Pack
  • LONG LASTING PERFORMANCE: Panasonic CR1620 3.V batteries are engineered to provide reliable, long-lasting power
  • CHILD RESISTANT SAFETY STANDARDS BASED PACKAGING: These Panasonic CR1620 batteries and packaging meet or exceed IEC 60086-4, ANSI c18-3m part 2, and UL 1642 compliance standards
  • LONG STORAGE LIFE: Our CR1620 batteries maintain power up to 8 years when unused and properly stored

Practical Examples

Let’s look at some practical examples to understand better how these batteries can be used interchangeably.

Key Fobs

Key fobs often use coin batteries. If your key fob uses a CR1616 battery, you might be able to use a CR1620 as a replacement. The CR1620 is slightly thicker, but if it fits, it can serve as an effective substitute.

Amazon Basics 6-Pack CR1616 Lithium Coin Cell Battery, 3 Volt, Long Lasting Power, Mercury-Free
  • IN THE BOX: 6-pack of CR1616 3-volt lithium coin cell replacement batteries for small electronic devices
  • DEVICE COMPATIBLE: Ideal for watches, calculators, games, medical devices, and more
  • LONG LASTING: Long-lasting, reliable battery life; performs in extreme temperatures

Small Electronic Devices

Other small electronic devices, like watches and calculators, also use coin batteries. Understanding the size and thickness of the battery can help you find a suitable replacement if the exact battery size is unavailable.

Frequently Asked Questions

What does “CR” stand for in coin batteries?

“CR” stands for lithium manganese dioxide, which is the chemical composition of the battery. This designation is standardized and helps identify the type of battery.

Can I use a different coin battery if I can’t find the exact size?

Sometimes, you can use a battery with a slightly different thickness or diameter. However, it’s essential to ensure that the battery fits securely in your device and provides the correct voltage.

Are all coin batteries 3 volts?

Most coin batteries used in small electronic devices are 3 volts. However, always check the specifications of your device to ensure you are using the correct voltage.

How do I dispose of old coin batteries?

Coin batteries should be disposed of properly. Many recycling centers accept old batteries. Check with your local waste management services for guidelines on battery disposal.

What devices commonly use coin batteries?

Coin batteries are commonly used in key fobs, watches, calculators, hearing aids, and small electronic toys. Their compact size makes them ideal for these devices.

Conclusion

Understanding the sizes of coin cell batteries can save you time and ensure your devices function correctly. Remember, the first two numbers represent the diameter, and the last two numbers indicate the thickness. By knowing this, you can make informed decisions when replacing batteries in your devices. Whether it’s a key fob, watch, or any other small electronic device, choosing the right battery size is crucial for optimal performance.

I hope this guide has been helpful. If you have further questions, feel free to reach out. Stay charged up and keep your devices running smoothly!

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