Duracell High Power Lithium 123 Battery (CR123A)

The Duracell CR123A is a 3V primary lithium (Li‑MnO2) cell designed for devices that need strong, quick pulses of power and dependable performance over long standby periods—common in tactical flashlights, motion sensors, alarm systems, and cameras.

When to Choose This Battery

• Use if your device specifically lists CR123A/123/CR17345 and needs high-drain capability (bright flashlights, fast sensor wake-ups).
• Use if you want long shelf life and reliable performance in cold or hot environments for outdoor or emergency gear.
• Avoid if your device requires AA, CR2, or rechargeable cells, or if you use the device daily enough that a rechargeable system (RCR123A/16340, 18650 if supported) is more economical.

Compatibility and Alternatives

• Also known as: 123, CR17345. Not the same as CR2 or AA.
• Rechargeable alternatives: RCR123A/16340 have different voltage and discharge curves. Use them only if the device manual explicitly permits rechargeables.
• Multi-cell devices: Replace all CR123A cells at the same time. Do not mix brands, ages, or partially used cells.
• Some flashlights accept either one CR123A or one 16340/18650. Follow your device’s labeling and instructions.

Quick Specs and Performance

• Chemistry: Lithium manganese dioxide (Li‑MnO2)
• Nominal voltage: 3 V
• Form factor: CR123A (approx. 34–35 mm length × 17 mm diameter)
• Typical capacity: roughly 1.4–1.6 Ah at low-to-moderate drain; less at high drain and in cold weather
• Operating temperature: commonly wide; consult packaging or datasheet. Many CR123A cells function in roughly -4°F to 140°F (-20°C to 60°C).
• Shelf life: long; check package date code for best-by information.

Real-World Runtime Examples

• EDC flashlight (200–300 lm): about 3–6 hours total on medium usage.
• Tactical flashlight (900–1,000 lm): roughly 30–90 minutes on high, with step-down for thermal control.
• Motion/PIR sensor or alarm contact: months to a year+ depending on signal strength, polling rate, and temperature.
• Trail camera: a season is common; shorter in extreme cold or with frequent triggers and IR usage.

Your results will vary with brightness level, driver efficiency, temperature, and how often the device draws peak current.

Installation

1. Confirm the device requires CR123A.
2. Match polarity: align the +/− marks with the device diagram.
3. Clean contacts with a dry, lint-free cloth if needed.
4. Close the battery door/cap firmly to ensure solid contact.
5. Function-test: verify brightness, sensor responsiveness, or camera readiness.

Safety and Care

• Do not recharge, disassemble, crush, or incinerate. Primary CR123A cells are non-rechargeable.
• Avoid short circuits—do not carry loose cells with keys or coins.
• Store in original packaging, cool and dry, away from direct heat or sunlight.
• Keep out of reach of children and pets; seek immediate medical help if swallowed.
• Recycle where available; follow local guidance for lithium primary battery disposal.

Use Tips to Maximize Runtime

• Use the correct size and chemistry; never mix new and used cells in the same device.
• Use lower brightness modes for longer flashlight runtimes; reserve high/turbo for bursts.
• In cold weather, keep spares in an inside pocket to maintain temperature.
• Clean battery and device contacts periodically to reduce voltage drop under load.

FAQs

Are CR123A and 123 the same?

Yes. CR123A, 123, and CR17345 are common designations for the same primary lithium size. Always check your device manual to confirm.

Can I use a rechargeable 16340 (RCR123A) instead?

Only if your device specifically supports rechargeables. Rechargeable 16340 cells have different voltage and discharge behavior that can damage unsupported devices.

Can I replace CR2 with CR123A?

No. CR2 and CR123A are different sizes and are not interchangeable.

Why does my flashlight step down from high quickly?

High modes draw large current and generate heat. Many lights step down to protect components and extend runtime; battery voltage sag under high drain can also trigger step-down.

How should I dispose of used CR123A batteries?

Take them to a battery recycling point if available. Do not incinerate or place in fire.

Key Takeaways

• Duracell CR123A provides compact, reliable 3V power for high-drain and standby devices.
• Choose it when you need strong pulse performance, long shelf life, and wide temperature operation.
• Use only where CR123A is specified; follow safety and storage best practices for consistent performance.