Maxell CR2450 Battery

Maxell CR2450: What It Is

The Maxell CR2450 is a 3V lithium manganese dioxide (Li-MnO2) coin cell designed for devices that require higher capacity than common coin cells like the CR2032. With a larger 24 mm diameter and 5.0 mm thickness, it delivers long runtimes and stable voltage for sensors, medical meters, key fobs, bike computers, and compact LED devices.

Key Specs

• Model: Maxell CR2450 (non-rechargeable)
• Nominal voltage: 3.0 V
• Typical capacity: ~620 mAh (at low drain)
• Chemistry: Lithium Manganese Dioxide (Li-MnO2)
• Size: 24 mm diameter × 5.0 mm height
• Weight: ~6.3 g
• Operating temperature: -20°C to +60°C (-4°F to 140°F)
• Polarity: Positive on the flat top case (+), negative on the bottom (-)

When to Use (and When to Avoid)

• Use if your device specifically calls for CR2450 and needs long runtime (e.g., wireless sensors, keyless entry remotes, medical meters, bike computers, LED beacons).
• Use when a CR2032/CR2025 cannot meet runtime requirements and the device is designed to fit the larger 24 mm × 5.0 mm cell.
• Avoid if your device requires a thinner or different size (e.g., CR2032 3.2 mm thick or CR2430 3.0 mm thick). Using the wrong thickness can cause poor contact or damage.
• Avoid mixing old and new batteries or different brands in the same device.

Compatibility and Cross-References

Also known as: ECR2450 (Energizer), DL2450 (Duracell), KCR2450, and other CR2450 equivalents. Some part numbers include suffixes (e.g., CR2450N) or tabs for soldering; match size and terminal style to your device.

Typical Runtime Examples

Actual life varies by device and temperature. These examples show ballpark estimates:

Device / Load	Approx. Current	Estimated Runtime
Key fob (intermittent use)	10–30 µA average	1–3 years
Wireless sensor (duty-cycled)	20–100 µA avg	8–24 months
LED tealight	5 mA	80–120 hours
Small LED beacon	15 mA	30–50 hours

Replacement Steps

1. Power off the device if possible.
2. Open the battery compartment with the correct tool; avoid prying near seals or contacts.
3. Note polarity. The flat side with the “+” symbol faces the indicated + mark in the device.
4. Remove the old cell and insert the new Maxell CR2450 without touching both faces simultaneously (reduces self-discharge and skin oil transfer).
5. Close the compartment securely and test the device.

Storage and Safety

• Store in original packaging at room temperature, dry, away from heat and direct sunlight.
• Do not recharge, crush, or short-circuit.
• Coin cell ingestion hazard: keep away from children and pets. If swallowed, seek immediate medical attention.
• For disposal, use battery recycling programs. Tape the battery faces to prevent shorting during transport.

CR2450 vs. Other Coin Cells

Type	Size (D × H)	Typical Capacity	Common Uses
CR2025	20 × 2.5 mm	~150–170 mAh	Watches, calculators, slim remotes
CR2032	20 × 3.2 mm	~200–240 mAh	Key fobs, PC CMOS, small sensors
CR2450	24 × 5.0 mm	~550–620 mAh	High-capacity sensors, medical meters, LED lights

FAQ

Can I use a CR2032 instead of a CR2450?

No. The CR2032 is smaller and thinner. It may not make reliable contact and will provide much less runtime. Use the size specified by your device.

Is the CR2450 rechargeable?

No. CR2450 is a primary (non-rechargeable) lithium battery. Do not attempt to recharge.

What does CR2450N mean?

It is a manufacturer-specific suffix for the same basic size and voltage. Check datasheets for mechanical differences (tabs, sealing, or height tolerance) and ensure fit.

What cutoff voltage should I expect?

Device cutoff varies, commonly 2.0–2.5 V. The battery delivers a relatively flat discharge around 3.0 V until near end of life.

How should I dispose of a used CR2450?

Recycle through approved battery collection points. Tape both sides of the cell to prevent short circuits during transport.