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CR123A vs CR2
CR123A and CR2 are not interchangeable. They differ in diameter (17 mm vs 15.6 mm), length (34.5 mm vs 27 mm). The CR123A holds about 1.9× the energy of the CR2 (1,500 mAh vs 800 mAh).
| CR123A | CR2 | |
|---|---|---|
| Type | lithium photo battery | lithium photo battery |
| Voltage | 3 V | 3 V |
| Size | 17 mm × 34.5 mm | 15.6 mm × 27 mm |
| Typical capacity | ≈ 1,500 mAh | ≈ 800 mAh |
| Rechargeable | no | no |
| Other codes | CR17345, DL123A, EL123AP, 123 | CR15270, DLCR2, ELCR2, CR15H270 |
Can I use CR2 instead of CR123A?
No. Different width: 15.6 mm vs 17 mm.
Can I use CR123A instead of CR2?
No. Different width: 17 mm vs 15.6 mm.
Where each one is used
CR123A: wireless security cameras and alarm sensors; tactical and weapon-mounted flashlights; film cameras; smart-home sensors and smart locks.
CR2: golf and hunting rangefinders; instant cameras such as some Fujifilm Instax models; film cameras; some smart locks and alarm sensors.