Panasonic CR2 3V Lithium Battery

The Panasonic CR2 is a compact 3V lithium primary cell designed for high-pulse, high-drain devices such as film/digital cameras, golf and hunting rangefinders, compact flashlights, motion sensors, and alarm peripherals. It balances long shelf life with strong cold-weather performance and dependable output.

At a glance

When to choose this battery

• Use if your device specifies “CR2” and needs reliable power with long standby (security sensors, rangefinders).
• Use for cold or hot environments where alkaline cells struggle.
• Use when you want long storage readiness (emergency kits, spares).
• Avoid if your device requires rechargeable power or lists “RCR2” (3.6 V Li‑ion) only.
• Avoid if your device calls for CR123A, 2/3A, AA/AAA—these are different sizes/voltages.

Real-world performance tips

• High-drain bursts: Supports camera flash recycling and laser pulses typical of rangefinders.
• Cold weather: Expect reduced capacity as temperatures drop, but lithium chemistry maintains function well below freezing.
• Runtime estimation: Hours ≈ capacity (mAh) ÷ device draw (mA). Example: a 300 mA flashlight may see a theoretical ~2.5 h; plan for 1.5–2 h in practice due to efficiency and cutoff.

Compatibility notes

• Only use in devices that explicitly specify CR2.
• Do not substitute CR123A (larger) or 2/3A cells; they won’t fit or match voltage.
• Do not charge. RCR2 rechargeables are 3.6 V and can damage 3 V-only devices.
• Install with correct polarity; check device markings.

Storage and safety

• Store cool and dry (59–77°F / 15–25°C), in original packaging or a battery case.
• Keep out of reach of children; ingestion hazard. If swallowed, seek immediate medical help.
• Do not mix old and new batteries or different brands in the same device.
• Transport and dispose safely: tape terminals to prevent shorting; recycle at approved battery drop-offs.

Alternatives

• Need rechargeability? Check if your device supports RCR2 (3.6 V). If not explicitly supported, stick with primary CR2.
• If your device lists CR123A or AA/AAA, use only the specified size; they are not interchangeable with CR2.

FAQ