Button cell battery Varta CR2430 3V 290mAh lithium coin cell

Varta CR2430 is a 3V lithium button cell with a nominal capacity of 290mAh in a compact coin form factor. It is designed to supply a stable voltage for small electronic devices that require low to moderate energy over long periods. The cell offers long shelf life and reliable operation in low-drain applications where a steady 3V output and compact size are important.

Advantages

The battery delivers a consistent 3V output and a nominal 290mAh capacity suitable for prolonged, low-current use. Its lithium chemistry ensures long shelf life and stable open-circuit voltage, while the coin cell format provides easy replacement and broad compatibility with devices that accept 24.5 mm diameter, thin-profile cells. The construction minimizes self-discharge and maintains performance in a range of ambient temperatures typical for consumer electronics.

Suitable for

• Wristwatches and small timing devices
• Calculators and remote controls
• Key fobs and car remotes
• Medical devices and sensors with low power draw
• Backup memory and real-time clock modules

Key specifications

• Chemistry: Lithium
• Nominal voltage: 3V
• Nominal capacity: 290mAh
• Form factor: Coin/button cell
• Typical diameter: 24.5 mm (coin-style)
• Typical thickness: approximately 3.0 mm
• Low self-discharge for long shelf life

How to use

Insert the battery into the device following the polarity markings, ensuring the correct orientation of the positive (+) and negative (–) sides. Handle the cell with dry hands or non-conductive tools to avoid shorting. Replace with the same type and size to maintain device performance. After removal, dispose of or recycle the battery according to local regulations for lithium batteries.

Recommendations

Store unused batteries in a cool, dry place away from metal objects and direct heat. Avoid short-circuiting or exposing the cell to high temperatures. For devices with memory backup or continuous operation, replace batteries before the end of life indicators appear to prevent data loss.