The Panasonic CR2477 Lithium Battery is a 3V, non-rechargeable manganese-dioxide lithium coin cell battery with a nominal capacity of 1000 mAh. It measures 24.5 mm in diameter and 7.7 mm in height, making it one of the largest coin cell batteries, ideal for devices requiring high capacity and long-lasting power.

Key Specifications:-

• Voltage: 3V (nominal), with a cutoff voltage of 2.0V.
• Capacity: 850–1000 mAh, depending on load and conditions.
• Dimensions: 24.5 mm (diameter) x 7.7 mm (height).
• Shelf Life: Up to 10 years with less than 1% annual self-discharge.
• Operating Temperature: Typically -30°C to 60°C (-22°F to 140°F), with some models supporting -40°C to 70°C.
• Weight: Approximately 10.8 grams.
• Continuous Drain: Up to 0.2 mA for standard CR2477; Panasonic’s BR2477 variant supports lower drain (0.03 mA) for specific low-current applications.

Features:-

• High Energy Density: Provides reliable, consistent power for demanding devices.
• Temperature Resilience: Performs well in extreme conditions, suitable for outdoor or industrial use.
• Long Shelf Life: Retains 90% capacity after 10 years under proper storage.
• Safety Features: Includes circuit protection to prevent overcharging or short circuits.
• Ease of Use: Simple design for easy installation and replacement.

Applications:-

The CR2477 is used in devices such as:

• Car key fobs and security systems
• Medical devices (e.g., glucometers)
• Cameras, calculators, and watches
• Computer memory backup (e.g., CMOS)
• Remote controls, toys, and IoT devices
• Temperature and humidity sensors (e.g., Ecobee, SensorPush)
• Alarm systems and smart thermostats

Compatibility:-

Replaces batteries labeled as CR2477, DL2477, ECR2477, KCR2477, BR2477, or LM2477. Note that BR2477 (carbon-monofluoride lithium chemistry) is interchangeable with CR2477 for low-current applications but has a lower continuous drain (0.03 mA vs. 0.2 mA).