Duracell CR2 High Power Lithium — Compact 3V Battery for Cameras, Sensors, and Security Gear

The Duracell CR2 High Power Lithium battery is a compact 3-volt cell engineered for devices that need fast pulses of energy and dependable performance in a small package. You’ll find CR2 batteries in 35 mm and digital cameras, laser rangefinders, motion detectors, smart-home sensors, and select medical and industrial instruments (as specified by the manufacturer). If your device is labeled “CR2,” this primary lithium cell provides the consistent voltage, temperature tolerance, and shelf life required for reliable day-to-day use.

Why Choose a CR2?

• High pulse capability: Supports quick bursts of current for autofocus, flashes, and active sensors.
• Stable 3V output: Predictable performance across a broad operating range.
• Compact power density: Small cylindrical format with strong energy reserve for its size.
• Temperature resilience: Designed to work in typical hot/cold swings encountered indoors and outdoors.
• Leak-resistant construction: Added assurance for delicate optics and electronics.

Common CR2 Applications

• Cameras, flashes, and laser rangefinders
• Security motion sensors and glass-break detectors
• Smart-home door/window sensors and alarms
• Medical and industrial instruments (as specified by device maker)
• Golf rangefinders and compact measurement tools

Technical Snapshot

• Chemistry: Lithium manganese dioxide (Li-MnO₂)
• Voltage: 3V
• Form factor: CR2 cylindrical (shorter than CR123A)
• Typical dimensions: ~27 mm length × ~15.6 mm diameter
• Type: Primary (non-rechargeable)

CR2 vs. CR123A vs. AA

CR2 is shorter and narrower than CR123A, and neither is interchangeable with AA batteries. Voltage, dimensions, and discharge characteristics differ. Always use the size and chemistry specified by the manufacturer to maintain correct contact geometry, safe operation, and expected runtime.

Installation Checklist

1. Verify size: Confirm your device calls for “CR2.”
2. Match polarity: Align the “+” and “–” with the diagram inside the compartment.
3. Clean contacts: Wipe spring or button contacts with a dry, lint-free cloth.
4. Close firmly: Ensure caps and doors are fully seated to prevent intermittent power.
5. Function test: For sensors/cameras, check activation and response time.

Storage, Handling, and Safety

• Store sealed in a cool, dry location away from direct heat.
• Do not carry loose cells with keys or coins (risk of short circuit).
• Keep away from children; dispose of used cells promptly.
• CR2 is not rechargeable—use rechargeables only if your device explicitly supports them (with correct type).

Tips to Maximize Runtime

• Select appropriate power modes (e.g., camera sleep settings, sensor intervals).
• Keep contacts clean to reduce voltage drop under load.
• Avoid extreme heat that accelerates self-discharge.
• Replace cells in pairs/sets if your device uses multiple batteries.

Troubleshooting

• No power: Recheck polarity and seating; verify the device truly requires CR2 (not CR123A).
• Intermittent behavior: Clean contacts and ensure doors/caps are fully latched.
• Short life: High pulse demands, continuous connectivity, or frequent triggering can consume energy quickly.

FAQs

Can I replace CR2 with rechargeable 15270/CR2 alternatives?

Only if the device manual allows it. Rechargeable models can have different voltages and discharge curves.

How long will a CR2 last in a motion sensor?

Runtime depends on trigger frequency, transmission strength, and environment. Lowering sensitivity or ping rate can extend life.

Is CR2 OK for outdoor use?

Yes, within normal environmental ranges. Temperature swings typical of outdoor sensors are supported.

Summary

Duracell’s CR2 High Power Lithium packs dependable 3V energy into a compact cylinder ideal for cameras, sensors, and security gear. Use the specified size, install carefully, and store spares properly for consistent performance.