The CR2032 is a small, round 3 volt lithium coin cell battery commonly used in compact electronic devices. It measures 20 mm in diameter and 3.2 mm thick, which is reflected in its name: “20” for the diameter and “32” for the thickness.

CR2032 lithium coin cell battery

Key Features

• Voltage: 3V
• Chemistry: Lithium manganese dioxide
• Shape: Coin/button cell
• Diameter: 20 mm
• Thickness: 3.2 mm
• Long shelf life: Typically 5 – 10 years
• Lightweight and compact
• Reliable low-power performance

Common Uses

CR2032 batteries are widely used in:

• Car key fobs and remote controls
• Watches
• Calculators
• Motherboards/CMOS memory backup
• Fitness devices
• Medical devices (like glucose meters)
• Small LED lights and toys

Advantages

• Long-lasting power for low-drain electronics
• Stable voltage output
• Leak-resistant design
• Operates well across a wide temperature range

Safety Notes

• Keep away from children and pets, as coin batteries can be dangerous if swallowed.
• Dispose of used batteries according to local electronic waste regulations.
• Do not recharge unless specifically labeled as rechargeable.