Lithium batteries power many modern electronic devices, from security systems to industrial sensors. Among the most commonly used 3V lithium batteries are CR123A and CR2.
Both batteries are cylindrical lithium batteries, and both deliver a 3-volt output. However, the two batteries differ significantly in size, capacity, and application scenarios.
Understanding the differences between CR123A vs CR2 batteries helps engineers, equipment manufacturers, and procurement teams choose the correct power source for their devices.
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Key Facts About CR123A vs CR2 Batteries
- Both CR123A and CR2 batteries are 3V lithium batteries, but they are not interchangeable.
- CR123A batteries are larger and offer higher capacity than CR2 batteries.
- CR123A batteries are commonly used in security systems, flashlights, and industrial devices.
- CR2 batteries are typically used in compact electronics such as cameras and sensors.
- Using the wrong battery type may result in device malfunction or poor performance.
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CR123A vs CR2 Battery Quick Comparison
| Voltage | 3V | 3V |
| Diameter | 17 mm | 15.6 mm |
| Height | 34.5 mm | 27 mm |
| Typical Capacity | 1400–1700 mAh | 750–1000 mAh |
| Chemistry | Lithium MnO₂ | Lithium MnO₂ |
| Weight | ~16 g | ~11 g |
| Common Applications | Flashlights, Security Cameras | Cameras, Sensors |
This table highlights the most important technical differences when comparing cr123a battery vs cr2.
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Are CR2 and CR123A the Same?
A common question people ask is: “Are CR2 and CR123A the same?” The answer is no. Although both batteries are 3V lithium batteries, they differ in several critical ways: physical dimensions, energy capacity, and typical device applications.
Because of these differences, CR2 and CR123A batteries are generally not interchangeable. Installing the wrong battery size may prevent the device from functioning properly or could damage the battery compartment.
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What is a CR123A Battery?
A CR123A 3V lithium battery is a cylindrical lithium manganese dioxide battery widely used in high-performance electronic devices.
These batteries are known for their high energy density, stable voltage output, and long shelf life, often exceeding 10 years under proper storage conditions.
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Common Applications of CR123A Lithium Batteries
CR123A lithium batteries are widely used in devices that require reliable power and long runtime.
Typical applications include:
- Security cameras
- Tactical flashlights
- Motion sensors
- Medical equipment
- Wireless security systems
- Industrial monitoring devices
Because of their higher capacity,or CR 123A lithium 3V batteries are often selected for high-drain or professional equipment.
What is a CR2 Battery?
The CR2 battery is another cylindrical lithium battery that delivers 3 volts, often referred to as CR2 3V lithium battery.
Compared to CR123A batteries, CR2 batteries are shorter and slightly thinner, which makes them ideal for compact electronic devices.
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Common Applications of CR2 Batteries
CR2 batteries are widely used in smaller electronic equipment where space is limited.
Typical devices include:
- Compact digital cameras
- Golf rangefinders
- Laser measurement tools
- Smart sensors
- Security detectors
- Portable electronic instruments
Because of their compact design, cr2 3v lithium batteries are particularly useful for portable and lightweight electronics.
CR123A vs CR2 Battery: Detailed Comparison
Understanding the detailed differences between cr2 vs cr123 battery helps engineers and product designers select the most suitable power source.
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Size Difference
| CR123A | 17 mm | 34.5 mm |
| CR2 | 15.6 mm | 27 mm |
The CR123A battery is noticeably taller and slightly wider, which allows it to store more energy. This difference in size is the primary reason the two batteries cannot be used interchangeably.
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Capacity Difference
| CR123A | 1500 mAh |
| CR2 | 850 mAh |
The CR123A battery usually provides almost double the capacity of a CR2 battery. As a result, devices powered by CR123A batteries typically operate longer before requiring replacement.
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Energy Output and Performance
Another difference between cr123a vs cr2 batteries lies in their power delivery capability.
CR123A batteries are better suited for:
- High-drain devices
- Security systems
- Professional equipment
CR2 batteries are more suitable for:
- Low to medium power electronics
- Compact devices
- Portable instruments
Application Guide: Which Devices Use CR123A or CR2?
Selecting the correct battery often depends on the device type.
| Tactical Flashlights | CR123A |
| Security Cameras | CR123A |
| Motion Detectors | CR123A |
| Smart Sensors | CR2 |
| Compact Cameras | CR2 |
| Laser Rangefinders | CR2 |
In industrial environments, CR123A batteries are frequently preferred because they offer longer runtime and higher energy output.
About PKCELL Lithium Batteries
PKCELL is a global battery manufacturer specializing in high-performance primary lithium batteries for industrial and professional applications.
Our main product lines include: LiSOCl₂ batteries, LiMnO₂ lithium batteries, LiFeS₂ batteries, hybrid pulse capacitors, and customized battery packs.
PKCELL provides reliable CR123A lithium batteries and CR2 lithium batteries. With strict quality control and advanced production technology, PKCELL batteries deliver stable voltage, long service life, and dependable performance for demanding environments.
FAQs About CR123A vs CR2 Batteries
Are CR2 and CR123A interchangeable?
No. CR2 and CR123A batteries have different dimensions and capacities, so they cannot usually replace each other in electronic devices.
What devices commonly use CR123A batteries?
CR123A batteries are often used in flashlights, security cameras, motion detectors, and other professional electronic equipment.
What devices use CR2 batteries?
CR2 batteries are typically found in compact cameras, golf rangefinders, laser measurement tools, and small electronic devices.
How long do CR123A lithium batteries last?
Most CR123A lithium batteries offer a shelf life of up to 10 years and provide stable performance during long-term storage.
Are CR123A batteries rechargeable?
Standard CR123A batteries are primary lithium batteries and are not rechargeable. However, rechargeable alternatives such as RCR123A batteries are available.
Post time: Mar-11-2026
