CR2 vs CR123 Battery

BySAWH'S

Comparing the differences and similarities between CR2 and CR123 batteries.

Specifications

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CR2 3V Lithium Battery
CR2 Battery 3V Lithium

CR2

  • Voltage: 3V Lithium Battery
  • Diameter: 15.1mm
  • Height: 26.7mm
  • Normal Weight: 11g
  • Application: photo cameras, LED flashlights, light meters, toys, clocks, and other photo equipment.
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cr123 duracell battery 3v lion
CR123 3V battery

CR123

  • Voltage: 3V Lithium Battery
  • Diameter: 16mm
  • Height: 35mm
  • Normal Weight: 16 g
  • Application: photo equipment, camera equipment, smart sensors, light meters, security cameras, LED flashlights, night vision goggles, Arlo cameras
  • Other Names: CR123A, DL123A, K123A, EL123AP, VL123A, 5018LC, and CR17345.
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We are going to answer these two questions:

Is the CR2 battery the same as CR123?

Can CR2 and CR123 batteries use interchangeably?

The image below clearly shows the difference between CR2 and CR123 batteries. While CR123 battery and CR2 battery have the same voltage and are both manufactured as lithium batteries however because of their differences in size CR2 batteries are NOT the same as CR123A batteries and CAN NOT be used interchangeably.
CR123 vs CR2 the size difference is easily noticeable, where the CR123 battery is bigger of the two batteries.
Please see the image below.
comparing CR2 to 123 battery
Comparing CR2 to CR123 battery
The diagram also shows the CR2 battery dimensions and CR123 battery dimensions.

A general rule with batteries, it is NOT recommended to mix old and new batteries together for usage.

Conclusion

These two batteries CR123 and CR2 are different from each other and CAN NOT be used interchangeably.

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