The Lithium CR2450 battery is a 3V coin cell widely used in small electronics due to its high energy density, long shelf life, and compact size. Popular brands include Panasonic, Energizer, and Duracell. Common applications span medical devices, wearables, and IoT sensors. Its equivalents, such as DL2450 or ECR2450, ensure compatibility across devices requiring stable power in compact form factors.
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How Does the CR2450 Differ from Other Lithium Coin Cells?
The CR2450 stands out with its 24.5mm diameter, 5mm height, and 620mAh capacity—larger than CR2032 (20mm) and CR2025 (15mm) variants. This allows it to deliver higher energy output for power-intensive devices like glucose monitors or car key fobs, where smaller cells may fail under sustained loads.
Which Brands Produce the Most Reliable CR2450 Batteries?
Top-tier brands include Panasonic (operating at -30°C to 85°C), Energizer (15-year shelf life), and Duracell (leak-proof design). Niche manufacturers like Varta and Toshiba also offer industrial-grade variants with enhanced temperature resistance for automotive or aerospace applications.
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| Brand | Temperature Range | Shelf Life |
|---|---|---|
| Panasonic | -30°C to 85°C | 10 years |
| Energizer | -20°C to 60°C | 15 years |
| Varta | -40°C to 85°C | 12 years |
Industrial applications often require specialized variants. For example, Varta’s high-drain CR2450-HD supports pulsed currents up to 15mA for alarm systems, while Toshiba’s version features a stainless steel casing to withstand vibration in automotive tire pressure sensors. Panasonic’s Pro Power series incorporates a dual-layer separator to prevent internal short circuits during extreme temperature cycling.
How Does Temperature Affect CR2450 Battery Performance?
Lithium CR2450 cells maintain 90% capacity at -20°C but lose 25% efficiency above 60°C. For extreme environments, Panasonic’s BR2450 (lithium-carbon fluoride) variant operates up to 125°C, ideal for engine-mounted sensors or oil-drilling equipment.
In sub-zero conditions, the electrolyte’s viscosity increases, temporarily reducing current output. This is critical for devices like avalanche beacons, where batteries must deliver instant power. Manufacturers mitigate this through ethylene carbonate additives that maintain ionic conductivity down to -40°C. Conversely, high temperatures accelerate lithium oxidation, causing permanent capacity loss. Aerospace applications often use gold-plated contacts and ceramic substrates to dissipate heat in satellite components using CR2450 cells.
What Safety Precautions Apply to CR2450 Battery Disposal?
CR2450 batteries contain lithium metal, which reacts violently with water. Dispose via certified e-waste centers—never incinerate. Retailers like Home Depot offer free recycling programs. In the EU, WEEE Directive mandates retailer take-back for proper chemical neutralization.
“The CR2450’s dominance in medical tech stems from its hermetic sealing, which prevents electrolyte leakage into sensitive implants. Recent advancements include hybrid designs with graphene anodes, boosting capacity by 18% without size changes.”
– Dr. Elena Torres, Power Systems Engineer at Medtronic
- Q: How long does a CR2450 battery last in a car key fob?
- A: Typically 2-3 years with daily use, depending on passive entry system power draw (average 12µA standby).
- Q: Are CR2450 batteries rechargeable?
- A: No—lithium-metal chemistry isn’t designed for recharging. Attempting to recharge can cause thermal runaway.
- Q: Can CR2450 batteries power LED lights?
- A: Yes, for low-current applications (e.g., 5mm LEDs drawing 20mA). Runtime ≈ 30 hours per cell.