What Is the Difference Between CR2016 and CR2032 Batteries

The CR2016 and CR2032 are both coin cell batteries, but they differ in size, capacity, and ideal use cases. The CR2016 is thinner at 1.6mm while the CR2032 is thicker at 3.2mm, which affects the devices they power. Both share the same 3-volt output and 20mm diameter, making them easy to confuse. Choosing the wrong one can lead to poor performance or device damage. This guide breaks down every difference so you can pick the right battery with confidence.

Have you ever opened a remote control, a car key fob, or a small electronic device and found a tiny silver coin-shaped battery inside? Those are called coin cell batteries, and two of the most common types are the CR2016 and CR2032. They look almost identical at first glance, but they are not the same. If you have ever wondered whether you can swap one for the other, you are not alone. This is a question many people ask when a device stops working and they need a quick fix.

The difference between these two batteries comes down to three main things: thickness, capacity, and the devices they are best suited for. The CR2016 is thinner and holds less power, while the CR2032 is thicker and lasts longer. Both are 3-volt batteries made by Panasonic, Energizer, Duracell, and many other brands. Understanding these differences can save you time, money, and the frustration of a device that just will not work right.

In this article, we will walk you through everything you need to know. We will compare their sizes, explain what each one is used for, and answer the most common questions people have. By the end, you will know exactly which battery to grab the next time you need a replacement. Let us dive in.

Key Takeaways

• Different Thickness: The CR2016 is 1.6mm thick, while the CR2032 is 3.2mm thick, which is the most obvious difference.
• Same Voltage: Both batteries deliver 3 volts, making them compatible with many similar devices.
• Capacity Gap: The CR2032 holds nearly double the capacity of the CR2016, lasting much longer in use.
• Device-Specific Fit: Always check your device manual before swapping, as thickness matters for proper fit.
• Not Always Interchangeable: Using one in place of the other can cause fit issues or poor performance.
• Wide Availability: Both are easy to find and affordable at most electronics and auto parts stores.
• Long Shelf Life: Both CR series batteries can last up to 10 years in storage when kept properly.

What Are CR2016 and CR2032 Batteries?

The CR2016 and CR2032 both belong to the CR series of lithium coin cell batteries. The “CR” stands for the chemical composition, which is lithium manganese dioxide. This chemistry gives them a stable 3-volt output and a long shelf life. They are called “coin cell” batteries because of their round, flat shape that resembles a small coin.

Understanding Coin Cell Battery Basics

Coin cell batteries are small, round, and thin. They power devices that need a compact and reliable energy source. You will find them in watches, car key fobs, garage door openers, calculators, and medical devices like blood glucose monitors. The CR2016 and CR2032 are among the most popular sizes in this category. They are easy to find and affordable, which is why they are so widely used.

Both batteries share the same nominal voltage of 3 volts. They also share the same diameter of 20 millimeters. The main difference lies in their thickness. The CR2016 is 1.6mm thick, and the CR2032 is 3.2mm thick. This small difference in size has a big impact on what each battery can do.

How the CR Series Works

The CR series uses lithium as the anode and manganese dioxide as the cathode. This combination produces a steady voltage over a long period. Unlike alkaline batteries, lithium coin cells do not leak easily and can last for years in storage. They also perform well in extreme temperatures, which makes them great for outdoor devices and automotive applications.

When you look at a battery label, the number tells you something specific. The first two digits, “20,” refer to the diameter in millimeters. The last two digits, “16” or “32,” refer to the thickness in tenths of a millimeter. So CR2016 means 20mm diameter and 1.6mm thick. CR2032 means 20mm diameter and 3.2mm thick. This naming system applies to all CR series batteries, including the CR2025 and CR2010.

CR2016 Battery: Size, Specs, and Uses

The CR2016 is the thinner option in the CR family. It is a great choice for devices that need a snug fit and do not require a lot of power. Let us take a closer look at what makes this battery tick.

CR2016 Dimensions and Capacity

The CR2016 has a diameter of 20mm and a thickness of 1.6mm. It typically has a capacity of around 75 to 90 milliamp hours (mAh). This means it can deliver a small amount of current for a moderate amount of time. Compared to the CR2032, the CR2016 holds about half the energy. Its slim profile makes it ideal for devices with tight battery compartments.

The voltage remains steady at 3 volts throughout most of its life. This is a big advantage over older battery types that drop voltage quickly. You get consistent performance from start to finish. The shelf life of a CR2016 is also impressive, often lasting 5 to 10 years if stored properly in a cool, dry place.

Common Devices That Use CR2016

The CR2016 is commonly found in smaller electronic devices. Here are some examples:

• Watches: Many slim watches use the CR2016 because it fits in a narrow battery compartment.
• Small remote controls: Compact remotes for fans, lights, or toys often use this battery.
• Car key fobs: Some vehicle key fobs are designed for the thinner CR2016 size.
• Calculators: Basic calculators and measuring tools frequently use this battery.
• Medical devices: Some small health monitors and digital thermometers rely on the CR2016.

If you are replacing a battery in any of these devices, check the manual or the old battery label. It will tell you whether you need a CR2016 or a different size. Using the wrong battery can cause the device to malfunction or not fit at all.

CR2032 Battery: Size, Specs, and Uses

The CR2032 is the thicker cousin of the CR2016. It is one of the most widely used coin cell batteries in the world. Its larger capacity makes it suitable for devices that need more power over a longer period.

CR2032 Dimensions and Capacity

The CR2032 has a diameter of 20mm and a thickness of 3.2mm. It typically offers a capacity of around 200 to 230 milliamp hours (mAh). That is nearly double the capacity of the CR2016. This extra capacity means the CR2032 can power devices for much longer before needing a replacement.

Like the CR2016, the CR2032 delivers a steady 3 volts. Its lithium chemistry ensures a slow, consistent discharge rate. This makes it reliable for devices that need a constant power supply. The shelf life is also excellent, often reaching 10 years or more when stored in proper conditions.

Common Devices That Use CR2032

The CR2032 is used in a wider range of devices due to its higher capacity. Here are some common applications:

• Car key fobs: Many modern vehicle key fobs use the CR2032 because it provides longer-lasting power.
• Garage door openers: These remotes often require the extra capacity of a CR2032.
• Computer motherboards: The CMOS battery on PC motherboards is almost always a CR2032.
• Fitness trackers and scales: Digital bathroom scales and fitness devices commonly use this battery.
• Gaming controllers: Some wireless controllers use the CR2032 for its reliable power delivery.

The CR2032 is so popular that it is often the go-to recommendation for most coin cell battery needs. If you are unsure which size to buy, the CR2032 is a safe starting point for many household devices.

CR2016 vs CR2032: Head-to-Head Comparison

Now that we have covered the basics of each battery, let us put them side by side. A direct comparison makes it easy to see which one is right for your needs.

Comparison Table

Feature	CR2016	CR2032
Diameter	20mm	20mm
Thickness	1.6mm	3.2mm
Voltage	3V	3V
Typical Capacity	75-90 mAh	200-230 mAh
Weight	Approx. 1.8g	Approx. 3.0g
Common Devices	Watches, small remotes	Key fobs, motherboards
Shelf Life	5-10 years	5-10 years
Price Range	$1-$3 each	$1-$4 each

Key Differences at a Glance

The most obvious difference is thickness. The CR2032 is exactly twice as thick as the CR2016. This means it will not fit into a compartment designed for the thinner battery. Conversely, a CR2016 will be too short in a CR2032 slot, leading to a loose connection and intermittent power.

Capacity is the second major difference. The CR2032 holds roughly 2.5 times the energy of the CR2016. This translates to longer usage time between replacements. For devices that run frequently or need consistent power, the CR2032 is the better choice.

Both batteries share the same voltage and diameter, which is why they are often confused. The 3-volt output makes them suitable for the same types of electronic circuits. The key is matching the battery to the device’s physical and power requirements.

Can You Use a CR2016 Instead of CR2032 (or Vice Versa)?

This is the question that comes up most often. The short answer is: it depends on the device. Let us explore what happens when you swap these two batteries and what you should do instead.

What Happens If You Swap Them

If you put a CR2016 into a device designed for a CR2032, the battery will be too short. It may not make proper contact with the battery terminals. This can cause the device to turn on and off randomly or not work at all. The loose fit can also cause the battery to shift around, which is not ideal for safety.

If you put a CR2032 into a device designed for a CR2016, the battery will be too thick. It may not fit into the compartment at all. You might be able to force it in, but this can damage the battery compartment or the device itself. The extra pressure can also cause the battery to leak or overheat.

In both cases, the device may still work temporarily, but the performance will be unreliable. You might notice flickering lights, weak signals, or frequent shutdowns. These are clear signs that the wrong battery size is being used.

Workarounds and Adapters

If you absolutely must use a different size, there are a few workarounds. You can use a coin cell battery adapter to fill the extra space in a compartment designed for a thinner battery. These adapters are cheap and easy to find online. However, they are not a permanent solution. The best approach is always to use the correct battery size for your device.

Some people try to stack two CR2016 batteries to match the voltage and thickness of a CR2032. This is risky and not recommended. Stacking batteries can cause overheating and damage to the device. Always check the device specifications before attempting any workaround.

How to Choose the Right Battery for Your Device

Choosing the right battery is simple when you follow a few straightforward steps. You do not need to be a tech expert to get it right. Here is how to make sure you always pick the correct size.

Checking Your Device Manual

The easiest way to find the right battery is to check the device manual. Most manuals list the exact battery model and size. If you have lost the manual, you can often find a digital copy online by searching for the device model number. The battery compartment itself may also have a label with the recommended size.

Look for markings like “CR2016” or “CR2032” on the old battery or inside the battery compartment. If the label is worn or faded, use a ruler to measure the thickness. A CR2016 is 1.6mm, and a CR2032 is 3.2mm. This simple measurement can save you from buying the wrong replacement.

Tips for Battery Longevity

Once you have the right battery, you want to make it last as long as possible. Here are some practical tips:

• Store batteries at room temperature: Extreme heat or cold can reduce battery life and performance.
• Remove batteries from devices not in use: This prevents slow discharge and potential leakage over time.
• Check the expiration date: Even though lithium batteries have a long shelf life, they do expire. Fresh batteries perform better.
• Clean battery contacts: A quick wipe with a dry cloth can improve the connection and extend device life.
• Buy from reputable brands: Trusted brands like Energizer, Duracell, and Panasonic offer consistent quality and reliability.

Following these simple steps will help your coin cell batteries perform at their best. It also saves you money in the long run by avoiding unnecessary replacements.

Common Mistakes and Expert Insights

Even with the best intentions, people make mistakes when choosing and using coin cell batteries. Here are some common pitfalls and tips from experts to help you avoid them.

Common Mistakes to Avoid

• Assuming all 20mm batteries are the same: The diameter may be the same, but the thickness and capacity are very different.
• Ignoring the device manual: Guessing the battery size can lead to poor fit and unreliable performance.
• Mixing old and new batteries: This can cause uneven power delivery and shorten the life of the new battery.
• Storing batteries loosely in drawers: Contact with metal objects like keys can cause discharge or short circuits.
• Using expired batteries: Old batteries may not hold a full charge and can leak, damaging your device.

Expert Tips for Battery Selection

Battery experts recommend always keeping a spare CR2032 on hand. It is the most versatile coin cell battery and works in a wide range of devices. If you own a car, keep one in your glove box. If you have a home office, keep one near your computer for the CMOS battery. Being prepared saves time and prevents inconvenience.

Another expert tip is to buy batteries in small packs rather than large bulk quantities. This ensures you always use fresh batteries and reduces waste. Coin cell batteries are inexpensive, so there is no need to buy in bulk unless you are stocking up for a large project or business use.

Quick Tips for Choosing Between CR2016 and CR2032

• Measure the old battery: Use a ruler or caliper to check the thickness if the label is unclear.
• Check the device label: Most devices have the battery size printed on or near the battery compartment.
• When in doubt, choose CR2032: It fits more devices and has a longer shelf life.
• Do not force a battery: If it does not fit easily, it is probably the wrong size.
• Buy from trusted retailers: Avoid cheap knockoff brands that may not meet safety standards.
• Dispose of old batteries properly: Take them to a recycling center or electronics store that accepts batteries.

These quick tips can make a big difference in how well your devices perform. A small effort in choosing the right battery goes a long way toward reliability and safety.

Conclusion

The difference between CR2016 and CR2032 batteries comes down to thickness, capacity, and the devices they are designed to power. The CR2016 is thinner and holds less energy, making it ideal for compact devices like watches and small remotes. The CR2032 is thicker and offers nearly double the capacity, which makes it the go-to choice for car key fobs, motherboards, and larger remotes.

Both batteries share the same 3-volt output and 20mm diameter, which is why they are so often confused. But the thickness difference of just 1.6mm versus 3.2mm has a big impact on fit and performance. Using the correct battery ensures your device works reliably and safely.

Next time you need a replacement, take a moment to check the size and requirements of your device. A few seconds of checking can save you from frustration and wasted money. Whether you need a CR2016 or a CR2032, choosing the right one is simple once you know what to look for. Keep this guide handy, and you will never have to guess again.

Frequently Asked Questions

Can a CR2032 replace a CR2016 in any device?

No, a CR2032 cannot replace a CR2016 in all devices. The CR2032 is twice as thick as the CR2016, so it will not fit into compartments designed for the thinner battery. Always check your device manual or measure the old battery before making a replacement. Using the wrong size can cause poor contact and device malfunction.

How long does a CR2016 battery last in typical use?

A CR2016 battery typically lasts between 1 and 3 years in devices like watches and small remotes. The actual lifespan depends on how often the device is used and the power demands of the device. Storing the battery properly can help extend its overall shelf life.

Are CR2016 and CR2032 batteries interchangeable in car key fobs?

Some car key fobs use the CR2016, while others use the CR2032. It depends on the vehicle make and model. Check your owner’s manual or look at the old battery to confirm the correct size. Using the wrong battery can cause the fob to work intermittently or not at all.

What is the voltage difference between CR2016 and CR2032 batteries?

There is no voltage difference. Both the CR2016 and CR2032 deliver a nominal voltage of 3 volts. The difference lies in their capacity and thickness, not in voltage output. This is why they are often confused, even though they serve different purposes.

Can I use a CR2025 instead of a CR2016 or CR2032?

A CR2025 has a thickness of 2.5mm, which falls between the CR2016 and CR2032. It may fit in some devices but not others. The capacity of a CR2025 is around 150 to 170 mAh, which is higher than the CR2016 but lower than the CR2032. Always check your device specifications before substituting a different battery size.

Where can I buy CR2016 and CR2032 batteries?

Both batteries are widely available at electronics stores, hardware shops, and online retailers. You can also find them at grocery stores and pharmacies. Look for trusted brands like Energizer, Duracell, and Panasonic for the best quality and reliability. Buying in small packs ensures you get fresh batteries with a long shelf life.