Compact lithium power for small electronics. The CR2032 is a widely used non-rechargeable lithium button cell (coin cell) battery that delivers a steady 3 V output and long shelf life in a tiny package. 
 
Key Specifications
Model: CR2032
Nominal Voltage: 3 V — reliable, stable output for low-drain devices. 
Capacity: ~200–240 mAh (varies slightly by brand).
Chemistry: Lithium Manganese Dioxide (Li-MnO₂).
Size: Diameter 20 mm × Thickness 3.2 mm — “2032” denotes 20 mm × 3.2 mm. Battery Skills
Weight: ~3 g. Farnell UK
Operating Temperature Range: Typically −20 °C to +60 °C (brand-dependent). 
Shelf Life: Up to about 10 years when stored unused. 
 
Features & Benefits
High Energy Density: Provides long life relative to size — ideal for devices that need reliable power over long periods.
Stable Voltage: Maintains close to 3 V output until nearly empty, ensuring consistent performance. 
Low Self-Discharge: Only loses a small fraction of charge each year when not in use, helping preserve battery life in storage. 
Leak-Resistant Construction: Designed to resist leakage and corrosion for safety and reliability. 
Compact & Lightweight: Fits into compact electronic compartments without adding bulk.