Button cell battery Voltcraft CR2032 3V 220mAh Lithium

Voltcraft CR2032 3V 220mAh Lithium is a single-cell button battery designed for compact electronic devices that require a stable 3-volt supply. With a nominal capacity of 220mAh, this coin cell is intended for single-cell replacements and for use in low- to medium-drain applications such as wristwatches, calculators, remote controls, key fobs, small medical sensors and motherboard CMOS backup. The chemistry provides long shelf life and consistent voltage output during typical discharge profiles.

Advantages

The battery delivers a stable 3V output and a nominal 220mAh capacity suitable for many coin-cell applications. Its lithium chemistry offers a long shelf life and reliable performance over time, with low self-discharge compared to non-lithium cells. The compact button-cell format makes it compatible with standard CR2032 battery holders and device compartments designed for 20 mm diameter coin cells.

Suitable for

• Wristwatches and wearable electronics
• Calculators and small handheld devices
• Key fobs and remote controls
• Motherboard CMOS/RTC backup
• Small medical sensors and fitness trackers

When it may not be suitable

This battery is intended for low- to medium-drain devices and single-cell applications. It is not suitable for high-drain devices that require sustained high current output or for multi-cell stacks where different chemistries are mixed. Devices that specifically require rechargeable cells (such as certain rechargeable wearables) should not use this primary lithium cell.

Key specifications

• Nominal voltage: 3 V
• Nominal capacity: 220 mAh
• Cell type: lithium button coin cell
• Diameter: 20 mm (standard CR2032 size)
• Typical applications: low- to medium-drain portable electronics

How to use

Insert the coin cell into the device with correct polarity, ensuring the positive (+) and negative (−) terminals match the device markings. For devices with a battery compartment, slide or press the cell into the holder until it is secure. Avoid shorting the terminals and do not attempt to recharge the cell. Dispose of used cells according to local regulations for battery recycling.

What to consider before purchase

• Confirm the device requires a 3V CR2032-size lithium primary cell.
• Check the device polarity markings and battery compartment dimensions.
• Consider expected device current draw to verify that a 220mAh capacity meets runtime needs.
• Plan for proper disposal or recycling of used lithium cells.

Usage recommendations

Store unused batteries in a cool, dry place away from direct sunlight and metal objects. Replace batteries promptly when device performance declines to prevent leakage or data loss in memory-backed devices.