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CR123 vs CR123A Difference & Which One Should You Choose?

14 April 2025 181

 

 

Ever wondered why your flashlight or camera prefers certain batteries? Meet the CR123 and CR123A batteries—two powerful choices that confuse many people. 

 

These small, round batteries are used in flashlights, cameras, and security systems. They can handle steady currents up to 2,000mA and quick bursts up to 3,000mA, making them great for strong devices.

 

But here’s the tricky part: CR123 vs CR123A—what’s the difference? This article will clear up the confusion and help you pick the right battery for your gadgets.

 

 

What is a CR123 Battery?

 

 

Definition

A CR123 battery is a small, strong lithium battery made for devices needing steady power. It is lightweight and shaped like a cylinder. This battery gives stable energy, making it perfect for gadgets that use a lot of power. Its lithium material helps it last long and work well, even in very hot or cold weather.

 

Specifications

Specifications Description
Voltage 3V
Capacity Between 1,300mAh and 1,700mAh
Size     34.5mm long and 17mm wide
Shelf Life 10 years (low self-discharge rate)
Weight About 17g
Chemical composition Lithium manganese dioxide (Li-MnO₂)
Operating temperature range -40℃ to +70℃
Maximum continuous discharge current       1100mA
Internal resistance <400mΩ (20℃±5℃)

 

Common Applications

 

Common Applications

 

  • Digital cameras: They give steady power to cameras, helping you take clear pictures without interruptions.
  • Flashlights: Perfect for LED flashlights and tactical lights, they provide bright and reliable light for outdoor trips or emergencies.
  • Medical equipment: Often used in devices like glucose meters and blood pressure monitors, they give dependable power for important health tools.
  • Security systems: Needed for home security gadgets, they offer long-lasting power and steady energy for constant monitoring.

 

 

What is a CR123A Battery?

 

 

Definition

 

A CR123A battery is a small, powerful lithium battery. It works well in devices needing steady and reliable energy. It is similar to the CR123 battery but often called "CR123A" by brands.  

 

These batteries follow global standards, so they fit many devices. Their lithium material stores lots of energy, making them great for gadgets that use a lot of power.

 

Its Features

  • Chemical Composition: Made with lithium, shown by the 'CR' label.
  • Physical Dimensions: About two-thirds the length of a regular A-size battery.
  • Electrical Specifications: Matches global standards for performance and compatibility.

 

Specifications

Specifications Description
Voltage 3V
Capacity About 1,550mAh
Size 17.0mm wide and 34.5mm tall
Shelf Life 10 years (low self-discharge rate)
Weight About 17g
Chemical composition Lithium manganese dioxide (Li-MnO₂)
Operating temperature range -40℃ to +70℃
Maximum continuous discharge current 1500mA
Maximum pulse discharge current 3000mA
Termination voltage 2.0V

 

Common Applications

 

 

Common Applications 

 

Smoke Detectors

CR123A batteries are often used in smoke detectors. Their long shelf life and steady power make them reliable for safety devices.

 

Tactical Flashlights

Tactical flashlights need strong, small batteries like CR123A. These batteries help flashlights shine bright, making them useful for outdoor activities or work.

 

Night Vision Scopes

Night vision scopes need steady power to work well. CR123A provides this, lasting long even in tough conditions.

 

 

Key Differences Between CR123 and CR123A

Features CR123 CR123A
Voltage Provides 3 volts steady power. Also provides 3 volts steady power.
Capacity Holds 1,300mAh to 1,700mAh. Typically holds about 1,550mAh.
Size     34.5mm long, 17mm wide. Similar dimensions, slightly shorter.
Shelf Life Lasts up to 10 years stored. Also lasts up to 10 years stored.
Compatibility Works in many devices. Compatible with most devices needing CR123.
Cost Generally cheaper option. Costs more but lasts longer.
Temperature Range Operates in -20°C to 70°C. Handles -40°C to 70°C better.
Common Uses Used in flashlights and cameras. Preferred for tactical and high-drain devices.
Naming Convention Explained CR123 focuses on the battery's size and shape. CR123A highlights its chemistry and features. The "A" in CR123A might mean small changes in chemistry. 

 

 

Pros and Cons of CR123 and CR123A

 

CR123

 

pros and cons of CR123

 

Pros

  • Easy to find: You can find them easily in stores or online.
  • Cheap: They are cheap, so they are good for saving money on everyday gadgets.
  • Works well: CR123 batteries work well, giving steady power to things like flashlights and security systems. They keep your stuff running smoothly without stopping suddenly.

 

Cons

  • Some brands might not last as long: Battery CR123 lithium is usually good, but some brands might not last as long. This can be a problem for devices that need a lot of power. If you need the battery to last a long time, check the brand's details to make sure it fits your needs.

 

CR123A

 

pros and cons of CR123A

 

Pros

  • Usually lasts longer: CR123A lithium batteries are known for lasting longer, about 1,550mAh. This means you don't have to change them often.
  • Works well: They work well even when used a lot, making them great for things like tactical flashlights and night vision scopes.
  • Safe and Recycled: CR123A batteries are also safe and can be recycled, which is good for the environment.

 

Cons

  • Costs more: CR123A batteries cost more because they last longer and work better. But they might not fit every budget.
  • Not fit all devices: Also, they might not work with all devices. Some gadgets might not need its extra features. Always check what your device needs before buying battery CR123A.

 

Here’s detailed information

Feature CR123A Batteries CR123 Batteries
Lifespan     2 to 5 years N/A
Voltage 3.7V 3V
Cost Higher than CR123 N/A
Device Compatibility Limited to specific devices N/A
Safety Profile Lower fire risk compared to others N/A
Environmental Impact Fully recyclable N/A

 

 

Are CR123 and CR123A the Same?

 

Are CR123 and CR123A the Same?

 

Functional Similarities

Battery CR123 and CR123A batteries look almost the same. They share many features and work similarly. Both use lithium manganese dioxide, which gives them strong energy and good performance. Their small, round shape fits many devices like flashlights and security systems.

Feature CR123 CR123A
Size     A bit longer and thinner A bit shorter and wider
Lifespan Up to 5 years in low-drain devices Up to 5 years in low-drain devices
Nominal Voltage 3V 3.7V
Chemical Composition Lithium manganese dioxide Lithium manganese dioxide
Operating Temperature -20°C to 70°C -40°C to 70°C
Energy Density 280 Wh/kg 280 Wh/kg
Safety Features     PTC protection PTC protection

 

Both batteries can often replace each other because they are so similar. They both provide 3 volts of power, which works for most devices. They also last up to 10 years when stored, so they stay ready to use. 

 

CR123A lithium battery, however, can handle colder and hotter temperatures, from -40°C to 70°C. This makes them better for extreme weather.

 

Manufacturer Naming Practices

The names CR123 and CR123A mostly depend on the company making them. "CR" shows the battery uses lithium, and the numbers describe its size and shape. The "A" in CR123A is usually just a branding choice. It might mean small changes, but these don’t matter much for most users.

 

Companies use these names to make their products stand out. Still, both batteries follow the same global rules for size, voltage, and safety. This means you can usually use either one without problems. Always check your device’s manual to make sure the battery fits.

 

 

Are CR123 and CR123A Batteries Interchangeable?

 

Are CR123 and CR123A Batteries Interchangeable?

 

Device Compatibility

Can you swap CR123 and CR123A batteries in devices? Yes, you usually can. Both batteries have similar features, like 3V voltage and lithium material. 

 

They are the same size, so they fit in most gadgets. Devices like cameras, flashlights, and security systems often work with either type.

 

These batteries meet global standards, making them reliable for high-energy devices. For example, cameras with flash or LED lights accept both types without problems. But small differences in brand or size might cause issues. To avoid this, check your device’s manual to pick the right battery.

 

Practical Usage Scenarios

In everyday use, CR123 and CR123A batteries work almost the same. Devices needing steady power, like tactical flashlights, can use either one. Many users say gadgets made for CR123 lithium battery also work fine with CR123A. This makes them easy to use and find.

 

Imagine you’re camping, and your flashlight dies. If you only have a CR123A battery but need CR123, you can still use it. Smoke detectors and medical tools also accept both types, keeping them running smoothly.

 

 

Which Battery Should You Choose?

 

Which Battery Should You Choose?

 

When to Use CR123 Batteries?

CR123 rechargeable batteries are great for everyday gadgets. They work well in devices that don’t need a lot of power. These batteries are affordable, making them perfect for flashlights and tactical lights. If you use a digital camera or a security system, they give steady power without costing too much.

 

Their small size fits easily into portable devices. They are ideal for flashlights, medical tools, and communication gadgets. If saving money is more important than long battery life, CR123 batteries are a smart choice.

 

When to Use CR123A Batteries?

CR123A rechargeable batteries are best for devices that use more energy. They have a bit more capacity, making them great for tactical flashlights and night vision tools. Smoke detectors and thermal cameras also work better with CR123A batteries because they last longer.

 

These batteries handle extreme temperatures, from -40°F to 158°F. If your device is used in tough weather, CR123A 3v lithium battery will perform well. Their strength and dependability make them a top pick for professionals using advanced gear.

 

 

CR123 and CR123A batteries are very similar. They can often be swapped in devices. Both give steady power, last long, and fit many gadgets. But picking the right one depends on your needs.

  • CR123 batteries: Great for daily gadgets because they are cheap and easy to find.
  • CR123A batteries: Best for devices needing more power, as they store energy better.

 

 

Frequently Asked Questions

Are cr123 and cr123a the same?

CR123 and CR123A are essentially the same battery model with a slightly different name, i.e. CR123 is the label commonly used for CR123A batteries.

Where can i buy cr123 batteries?

CR123 lithium batteries can be purchased through a variety of channels, including online e-commerce platforms, brand official websites, professional battery sellers, and physical retail stores.

What battery can I use instead of CR123?​

CR123 3v battery can be replaced by rechargeable RCR123A Li-Ion batteries, 16340 batteries or specific combinations.

What is CR123 used for?

CR123 batteries are primarily used in high-power devices that require reliable, long-lasting power, such as alarm clocks, flashlights, cameras, and other home electronics.

What is the lifespan of a CR123 battery?

The average lifespan of a CR123 rechargeable battery is three (3) to five (5) years, but actual lifespan will depend on the equipment requirements and environmental conditions.

Where can you buy cr123a batteries?

CR123A 3v battery can be purchased through the following channels: online e-commerce platforms, professional battery sellers, physical stores or online stores, and physical retail stores.

What battery can replace CR123A?

Batteries that can replace CR123A include rechargeable RCR123A lithium-ion batteries, 16340 batteries or specific combination batteries. The specific choice depends on the needs of the device.

How long will a CR123A battery last?

The average lifespan of a CR123A lithium battery is three (3) to five (5) years. However, the specific lifespan of the battery will vary depending on the application scenario and the power consumption of the device.

Can I use 18650 instead of CR123A?

18650 batteries cannot directly replace 3 volt battery CR123A, but they can be compatible through battery conversion boxes or specific circuit designs. You need to choose a suitable replacement solution based on the needs of the device.

What can replace 2 CR123A batteries?​

Possible alternatives to the two CR123A batteries include using 16650 batteries, 18650 batteries (adaptive circuit required), rechargeable RCR123A batteries, or combining batteries in series to achieve voltage matching.

 

 

Read More:

Discover the Uses of CR123A Batteries

Comprehensive Analysis of CR123A battery: Features, Applications and Purchase

 

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Anderson Snape
Anderson Snape, born in 1972, completed his undergraduate studies at Loughborough University in the UK in 1993 and received a bachelor's degree in electrical engineering. In 1996, he furthered his studies and obtained a master's degree from Newcastle University. As a senior engineer in the field of integrated circuit testing, Anderson has been working in the chip testing industry for more than 20 years, accumulating profound professional experience and holding unique insights into the industry. He not only focuses on technical practice, but also actively engages in chip-related science popularization work. At the same time, he keeps up with the current hot topics in the semiconductor industry and has made important contributions to the progress and development of the industry.