cr2032 3v lithium battery

🔹 CR2032 – 3V Lithium Coin Cell Battery

A standard 3-volt lithium manganese dioxide coin cell battery, widely used for low-power electronics, memory backup, real-time clocks (RTCs), key fobs, calculators, and small devices. Provides a stable voltage and long shelf life.

✅ Specifications:

• Battery Type: Lithium Manganese Dioxide (Li-MnO₂)

• Nominal Voltage: 3.0 Volts

• Capacity: ~220 mAh (Typical, varies slightly by manufacturer)

• Diameter: 20.0 mm

• Thickness: 3.2 mm

• Terminal: Positive (+) top, Negative (-) flat can

• Chemistry: Non-rechargeable (Primary Cell)

• Operating Temperature: -20°C to +70°C (typical)

• Shelf Life: ~10 years at 20°C (Excellent long-term storage)

• Weight: ~3.0 grams

• Quantity: 1 piece (standard)

⚙️ Key Features:

• High Energy Density: Provides reliable power in a compact, lightweight package.

• Long Shelf Life: Low self-discharge rate (<1% per year), ideal for infrequently used devices.

• Stable Voltage: Maintains a relatively constant voltage (~3V) throughout most of its discharge cycle.

• Wide Temperature Range: Operates effectively in both cold and warm environments.

• Safe & Reliable: Sealed construction, no liquid electrolyte, suitable for consumer electronics.

📦 Typical Applications:

• Motherboard & BIOS Memory Backup: Preserving CMOS settings and RTC data in computers.

• Small Electronics: Calculators, digital thermometers, laser pointers, and pedometers.

• Keyless Entry Systems: Car key fobs, security system remotes.

• Wearables & Medical Devices: Fitness trackers, glucose meters, hearing aids.

• Toys & Games: Battery-operated toys, trading card game accessories.

• DIY Electronics: Powering low-power microcontrollers (e.g., in sleep mode), RTC modules, and sensor nodes.

🔧 Handling & Usage Tips:

1. Polarity: The positive (+) side is the smaller, marked face (often with a +). The negative (-) side is the larger, flat metal can.

2. Holder/Contacts: Use a proper CR2032 battery holder for secure mounting and easy replacement in your projects.

3. Current Draw: Best suited for low-current applications (typically ≤ 5mA continuous, with brief pulses up to 20mA). High current draw drastically reduces capacity and can damage the cell.

4. Shelf Life: Store in a cool, dry place. Check expiration date on packaging for best performance.

5. Replacement: Ensure the replacement battery has the same specifications (CR2032, 3V). Avoid mixing old and new batteries.

⚠️ Important Safety & Disposal Notes:

• DO NOT RECHARGE: This is a non-rechargeable primary cell. Attempting to recharge can cause leakage, overheating, or rupture.

• DO NOT SHORT CIRCUIT: Avoid connecting the positive and negative terminals directly together, as this can generate excessive heat.

• DO NOT DISASSEMBLE OR INCINERATE.

• KEEP AWAY FROM CHILDREN AND PETS: If swallowed, seek immediate medical attention.

• Proper Disposal: Recycle or dispose of according to local regulations for lithium batteries. Do not dispose of in regular household trash.