Key Specifications at a Glance
| Feature | Specification |
|---|---|
| Chemistry | Lithium Manganese Dioxide (Li-MnO₂) |
| Nominal Voltage | 3 Volts |
| Nominal Capacity | 1400 mAh (down to 1.8V @ 20°C) |
| Standard Discharge | 20 mA |
| Max Discharge Current | 1000 mA (1A) @ 20°C |
| Weight | ~17 grams |
| Dimensions | 34 mm x 16 mm (Diameter x Height) |
| IEC Standard Name | CR17345 |
Detailed Analysis of Specifications
1. Electrical Characteristics
Voltage Profile: A key advantage of lithium chemistry is its flat discharge curve. Unlike alkaline batteries that gradually lose voltage, this battery will stay very close to 3V for most of its life, providing consistent performance before a sharp voltage drop at the end.
Capacity: The 1400 mAh capacity is measured under a standard 20mA discharge down to a cut-off voltage of 1.8V. Capacity can be lower if discharged at higher currents (e.g., at the max 1000mA).
High-Drain Capable: The ability to deliver up to 1000mA makes it suitable for power-hungry devices.
2. Physical Characteristics
Size: The dimensions (17mm diameter x 34mm height) are the standard for a CR123A battery.
Weight: At only 17g, it is very lightweight for its power output.
3. Environmental & Storage
Operating Range: Excellent performance in a wide temperature range (-20°C to 60°C), making it ideal for outdoor and extreme-condition use.
Storage: For long-term storage, the recommended conditions are a cool, dry place (5°C to 35°C, <70% Humidity). Storing batteries in a refrigerator (in a sealed bag to prevent moisture) is often recommended.
Cross-Reference & Compatibility
This battery is sold under many names. The most common name is CR123A. The provided list includes:
Direct Equivalents: CR123, CR123A, 123A, 5018LC
Manufacturer Codes: DL123A (Duracell), EL123AP (Energizer), RL123A (Rayovac), K123LA (Kodak), etc.
IEC Standard: CR17345 is the official international designation.
Important Note: While "CR123" and "CR123A" are often used interchangeably, they are physically the same. The "A" suffix is a manufacturer designation and does not indicate a different size. This battery is not compatible with the larger 16340 (CR123A-sized) rechargeable battery, which has a different voltage (3.7V).
Advantages & Typical Applications
Advantages:
Long shelf life (up to 10 years).
Maintains stable voltage for consistent device performance.
Excellent performance in both high and low temperatures.
High energy density (more power for its size and weight).
Typical Applications:
Digital Cameras and Flash Units
High-Powered LED Flashlights (especially tactical lights)
Security Systems and Sensors
Medical Devices
Laser Sights
Electronic Dog Collars
Package Options
The batteries are available in retail packages of 1, 2, or 4 cells. It's often cost-effective to buy multi-packs if you have multiple devices that use this common battery type.
