Coin cell battery Energizer CR2032 3 V 240 mAh lithium

Energizer CR2032 3 V 240 mAh lithium coin cell is a compact power source designed for small electronic devices requiring a stable low-current supply. The battery delivers a nominal voltage of 3 V and a rated capacity of 240 mAh in a slim, round form factor. Its chemistry and construction provide a long shelf life and reliable performance for clocks, remote controls, key fobs, calculators, small sensors and motherboard memory backup applications where consistent voltage is important.

Advantages

The Energizer CR2032 offers stable output voltage over its service life and low self-discharge for extended storage. Its compact coin shape and light weight make it easy to install in confined battery compartments. The lithium chemistry delivers higher energy density compared with alkaline button cells and maintains performance at a wide range of operating temperatures. The battery is suitable for low-drain and intermittent-use devices and provides predictable discharge characteristics useful for timekeeping and memory backup.

Suitable for

• Wristwatches and fitness trackers requiring a 3 V coin cell
• Car and home key fobs, remote controls
• Calculators, digital thermometers and small measuring instruments
• Wireless sensors and small IoT devices with low power draw
• Motherboard CMOS/BIOS memory backup and configuration memory

Key specifications

• Nominal voltage: 3 V
• Rated capacity: 240 mAh
• Chemistry: lithium manganese dioxide (Li-MnO2)
• Form factor: coin cell, 20 mm diameter, 3.2 mm thickness
• Typical operating temperature range: -20°C to +60°C (device-dependent)
• Low self-discharge for extended shelf life

How to use

Install the battery in the device observing correct polarity: the positive (+) side typically faces outward in most holders. Ensure the contact surfaces are clean and free of corrosion before insertion. Replace the battery when device performance indicates low voltage, such as unreliable timekeeping, weak transmitter range, or display dimming. Dispose of the used battery according to local regulations for lithium cells; do not incinerate or short-circuit the cell.

Usage recommendations

Store unused batteries in a cool, dry place away from direct sunlight. Use the Energizer CR2032 in applications matched to its capacity and voltage; avoid high-drain devices designed for rechargeable or larger-format cells. For devices that are sensitive to voltage drop, replace the coin cell promptly when device alerts or measurement thresholds indicate low battery.