The CR123A 3V lithium battery is a compact, high-energy power source designed for devices requiring reliable, burst-heavy power. Commonly used in tactical flashlights, medical devices, and security systems, its lithium manganese dioxide (Li-MnO2) chemistry ensures stable voltage delivery and a 10-year shelf life. With peak currents up to 3A, it’s ideal for cold environments (-40°C to +70°C) where standard batteries fail.
What Does CR Stand For In Battery?
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What defines a CR123A 3V battery?
The CR123A uses Li-MnO2 chemistry for 3V nominal voltage and 1,550mAh capacity. Its cylindrical design (17mm x 34.5mm) fits high-drain devices needing 3A pulses. Pro Tip: Store them below 60°C to prevent capacity loss—a heat-damaged CR123A risks leaking manganese dioxide electrolyte. For example, night vision goggles use CR123As because they maintain 80% capacity even at -20°C.
Where are CR123A batteries commonly used?
These batteries power tactical gear like weapon-mounted lights, digital cameras (Nikon SB-28 flash), and home security sensors. Hospitals rely on them in portable EKG monitors due to their 10-year standby capability. Ever wondered why smoke detectors last a decade on one CR123A? Their low self-discharge rate (<2% annually) outperforms alkaline alternatives by 4x in long-term applications.
How long does a CR123A last compared to AA?
CR123A batteries typically deliver 1,500mAh at 3V (4.5Wh), while AA alkalines provide 2,800mAh at 1.5V (4.2Wh). Despite similar energy, CR123As sustain high-current loads better—their 3A pulse capacity lasts 3x longer in 1W LED flashlights. However, AAs win in low-drain devices like remotes. Pro Tip: For trail cameras, CR123As capture 30% more nighttime images due to faster voltage recovery between shots.
| Metric | CR123A | AA Alkaline |
|---|---|---|
| Voltage | 3V | 1.5V |
| Peak Current | 3A | 0.5A |
| Runtime at 1A | 90 min | 15 min |
Are CR123 and CR123A batteries interchangeable?
Yes—CR123 and CR123A denote the same IEC standard battery (IEC CR17345). The “A” suffix was added by manufacturers for trademark purposes. However, check device specs: some high-drain gadgets (e.g., SureFire flashlights) require 3.2V LiFeS2 CR123As, not standard 3V versions. Confused? Always match voltage labels—using a 3.2V CR123A in a 3V device risks overheating.
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| Variant | Chemistry | Voltage |
|---|---|---|
| CR123A | Li-MnO2 | 3V |
| RCR123A | Li-ion | 3.7V |
| CR17345 | Li-FeS2 | 3.2V |
What alternatives exist for CR123A batteries?
RCR123A rechargeables (3.7V Li-ion) are popular but require specific chargers. For emergencies, two 3V lithium coin cells (CR2032) in series can mimic CR123A voltage—though with reduced current capacity. Did you know some solar lights now accept CR123As? Their 3V output aligns with LED drivers, but runtime halves compared to 18650 Li-ion packs.
Redway Battery Expert Insight
FAQs
No—standard CR123As are single-use. Only RCR123A Li-ion variants (3.7V) are rechargeable, but they require voltage-compatible devices.
Why do CR123A batteries cost more than AA?
Their lithium chemistry and pressurized construction boost manufacturing costs by 40%, but they deliver 5x the peak current for demanding electronics.
Do CR123A batteries expire?
Unused CR123As retain 95% charge after 10 years when stored below 25°C—unlike alkalines that deplete in 5-7 years.
What Battery Can Replace CR123A?
