CR123A and 123 batteries are the same cell type with different labeling conventions, designed for 3V lithium-manganese chemistry. The “CR” prefix denotes lithium chemistry with manganese dioxide cathode, while numerical designations like “123” indicate cylindrical dimensions (17mm diameter x 34.5mm height). All variants provide stable voltage output for security systems and medical devices, though users must verify voltage compatibility when substituting RCR123A (rechargeable 3.7V) alternatives.
Are CR123A and 123 batteries interchangeable?
Both labels reference identical non-rechargeable lithium cells with 3V nominal output. The “123” designation represents consumer labeling, while “CR123A” follows IEC standardization (where C= lithium chemistry, R=round cell, 123A=standardized size). Practical application: A Duracell 123 battery matches Panasonic CR123A in dimensions and electrical specs.
Technical specifications confirm interchangeability – both types deliver 1300-1500mAh capacity at 17×34.5mm sizing. However, watch for suffix variations: CR123A (standard) vs CR17345 (alternative numbering). Pro Tip: Always check expiry dates when mixing brands – old stock may have reduced capacity despite identical labels.
How does voltage affect CR123A compatibility?
Standard CR123A operates at 3V nominal voltage, while RCR123A (rechargeable) cells use 3.7V lithium-ion chemistry. This 23% voltage difference creates critical incompatibility: Using RCR123A in devices designed for 3V cells risks circuit damage. Example: Two rechargeables in series produce 7.4V vs 6V from standard CR123As, potentially burning out flashlight LEDs.
| Parameter | CR123A | RCR123A |
|---|---|---|
| Chemistry | Lithium-Manganese | Li-ion |
| Voltage | 3V | 3.7V |
| Rechargeable | No | Yes |
What safety certifications apply to CR123A?
Legitimate CR123A cells carry UL MH45237 certification for thermal stability and leak resistance. Premium versions add UN38.3 transport approval through rigorous vibration/altitude testing. Practical consideration: Avoid uncertified cells in medical devices – a failed smoke detector battery caused 12% of US residential fire fatalities in 2023.
How does temperature impact performance?
CR123A excels in -40°C to 60°C environments, outperforming alkaline alternatives that freeze below -18°C. Lithium chemistry maintains 85% capacity at -30°C, ideal for arctic expeditions. Pro Tip: Store backup cells at 20°C to achieve 10-year shelf life – heat accelerates self-discharge (1%/year at 21°C vs 3%/year at 30°C).
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Can CR123A be used in series configurations?
Yes, but follow strict voltage matching protocols. Mismatched cells in multi-battery devices (like 6V camera flashes) cause reverse charging. Example: Pairing a 1500mAh CR123A with 1400mAh cell risks 10% capacity loss and potential leakage. Always install same-brand, same-production-date cells in critical applications.
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FAQs
Yes, typically within 10 years. Check date codes – first two digits indicate year, next two for month (e.g., “2508” = 2025 August).
Are CR123A batteries allowed on planes?
Permitted in carry-ons (FAA limits: 2g lithium per cell). CR123A contains 1.5g – pack spares in original retail packaging.
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