The Lithium CR1620 battery is a compact, high-performance power source widely used in small electronic devices. As a member of the lithium button cell family, it offers reliable energy storage with a long shelf life. This guide explores its specifications, applications, and safety considerations.

Technical Specifications

• Chemistry: Lithium manganese dioxide (Li-MnO?), a primary (non-rechargeable) cell.

• Voltage: 3 volts (nominal), providing stable output until depletion.

• Dimensions: 16mm diameter × 2.0mm height.

• Capacity: ~75mAh (milliampere-hours), varying slightly by manufacturer.

• Operating Temperature: -30°C to 60°C, suitable for diverse environments.

• Shelf Life: Up to 10 years when stored properly (cool, dry conditions).

Applications
CR1620 batteries power devices requiring compact, long-lasting energy:

• Wearables: Fitness trackers, watches.

• Electronics: Calculators, key fobs, LED lights.

• Medical Devices: Thermometers, glucose monitors.

• Backup Power: Memory preservation in electronics.

Advantages

• High Energy Density: Delivers consistent power in a small form.

• Long Shelf Life: Minimal self-discharge (~1% annually).

• Temperature Resilience: Performs in extreme conditions.

• Lightweight: Ideal for portable devices.

Disadvantages

• Non-Rechargeable: Single-use, requiring proper disposal.

• Environmental Impact: Contains lithium; improper disposal harms ecosystems.

• Ingestion Risk: Dangerous if swallowed, especially for children.

Safety Considerations

• Handling: Avoid short-circuiting, puncturing, or exposing to high heat.

• Disposal: Recycle via designated facilities; never incinerate.

• Child Safety: Store out of reach; seek immediate help if ingested.

Comparison with Similar Batteries

• CR2032: Thicker (3.2mm), higher capacity (~225mAh).

• CR2016: Thinner (1.6mm), lower capacity (~90mAh).

• Alkaline Cells: Lower voltage (1.5V); not interchangeable.

Proper Usage & Storage

• Installation: Ensure correct polarity (+ side typically faces up).

• Storage: Keep in original packaging in cool, dry environments.

• Replacement: Use only CR1620 or manufacturer-approved equivalents.

FAQs

• Can I substitute CR1620 with CR2016? No—different thicknesses may cause fit issues.

• How long does it last? Varies by device usage; e.g., a 0.1mA drain could yield ~750 hours.

• Are they rechargeable? No—attempting to recharge may cause leakage or rupture.

Environmental Impact
Lithium batteries require recycling to prevent soil and water contamination. Many retailers offer recycling programs.

Conclusion
The CR1620 is a versatile, reliable power source for compact electronics. Understanding its specs and safety ensures optimal performance and environmental responsibility. Always prioritize manufacturer guidelines for device compatibility and handling.