Energizer CR2450 3V Lithium Coin Cell

Energizer CR2450 batteries deliver dependable 3-volt power in a larger coin-cell format that extends runtime for devices designed around the 24.5 mm × 5.0 mm size. Choose CR2450 when your device calls for this exact code and you want longer service intervals than smaller 20 mm coin cells can provide.

At a Glance

Attribute	Details
Chemistry	Lithium manganese dioxide (primary, non-rechargeable)
Nominal voltage	3 V
Size	≈24.5 mm diameter × 5.0 mm thickness
Typical capacity (size class)	Approximately 600–620 mAh (varies by manufacturer, load, and temperature)
Best for	Low-to-moderate drain devices with intermittent bursts: sensors, remotes, beacons, small instruments

Where CR2450 Works Well

• Smart-home and building sensors: thermostats, door/window contacts, leak and environmental sensors
• Automotive access: keyless entry remotes and fobs that benefit from longer intervals between swaps
• Health and wellness accessories: glucose meters, smart scales, heart-rate straps
• Wearables and beacons: BLE tags, asset trackers, safety beacons
• Sports and outdoor electronics: cycling computers, cadence/speed sensors, GPS accessories
• Instruments and IoT: data loggers, compact meters, inspection tools

CR2450 vs Nearby Sizes

• CR2430 (24.5 × 3.0 mm): Same diameter, thinner, lower capacity. Only use if the device specifies CR2430.
• CR2032 (20 × 3.2 mm): Smaller diameter and thinner; not physically compatible with a 24.5 mm bay.
• CR2477 (24.5 × 7.7 mm): Same diameter, much thicker; will not fit in a bay designed for CR2450.

Always match the code on your existing battery or device manual. Do not stack thinner coins to imitate a thicker cell.

Why Choose Energizer

• Consistent, stable voltage for accurate sensing and reliable radio transmissions
• Leak-resistant construction to protect small-contact battery bays
• Low self-discharge for dependable starts after storage
• Wide availability in single packs, multipacks, and bulk cases for standardization

Practical Runtime Expectations

Actual life depends on duty cycle, temperature, and device design. As rough planning guides:

• Door/window sensor (low traffic, moderate climate): about 12–24 months
• Key fob (daily use): about 6–18 months
• BLE beacon or tag (moderate interval, indoor): about 6–18 months
• Bike computer/sensors (weekly rides): about 6–12 months

Cold weather and frequent transmissions shorten runtime. Clean contacts and correct seating improve results.

Buying Options and Recommendations

• Single or 2-pack: quick fixes and glovebox spares
• 4–10 pack: households, clubs, and field kits with multiple devices
• Dealer sleeves (10–25): technicians, small shops, and property teams
• Inner/master cases (100–1,000+): facilities, campuses, and IoT fleets with planned rotations

Compatibility and Fit

CR2450 bays are engineered for 24.5 mm × 5.0 mm cells. Using thinner (CR2430) or smaller-diameter (CR2032) cells can cause intermittent power or no contact. Thicker cells (CR2477) will not fit. Match the exact size code and check polarity before installation.

Installation Tips

1. Confirm size: look for “CR2450” on the old cell or in the manual.
2. Observe polarity: the flat face is typically “+”. Follow the diagram inside the bay.
3. Clean contacts: wipe pads/springs with a dry, lint-free swab.
4. Seat the cell flat: ensure no rocking; close the cover securely.
5. Test immediately: wake or pair the device to confirm operation.

Storage and Handling

• Store cool and dry, away from direct sun and dashboards.
• Keep in original packaging to prevent shorting and mix-ups.
• Use FIFO: mark received month/year and use oldest first.
• Carry sealed spares in service kits for on-the-spot replacements.

Troubleshooting

• If a new cell doesn’t fix it: recheck size and polarity, clean contacts, and ensure spring tension.
• For remotes/sensors: some devices need a reset or re-pair after full power loss.
• From freezing temps: let the device warm to room temperature before testing.
• Try a second fresh cell to rule out seating or contact issues.

Safety Notes

• Keep away from children and pets; coin cells pose an ingestion hazard.
• Do not recharge; CR2450 is a primary battery.
• Avoid short circuits; do not carry loose cells with metal objects.
• Recycle spent cells at approved collection points.

FAQ

Is CR2450 the same as any 3V coin battery?

No. CR2450 is a specific size (24.5 × 5.0 mm). Always match the exact code your device specifies.

Can I substitute CR2430, CR2032, or CR2477?

No. Differences in thickness and/or diameter affect fit and contact pressure. Use only the size called for.

How long will a CR2450 last?

It depends on duty cycle, temperature, and device design. Many low-duty sensors and remotes see several months to a couple of years between changes.

Do Energizer CR2450 cells come in bulk?

Yes. They are commonly available in single packs, multipacks, and bulk case quantities for teams and facilities.

Is the CR2450 rechargeable?

No. Use once and recycle responsibly.

Summary

Energizer CR2450 coin cells provide stable 3V power and extended runtime for devices that specify the 24.5 mm × 5.0 mm format. Match the exact size, install with clean contacts, and choose the right pack size—from single cards to bulk cases—based on how often you service your devices.