Button cell battery Voltcraft CR 2430 3V 290mAh lithium

Voltcraft CR 2430 is a single-cell lithium button battery with a nominal voltage of 3V and a rated capacity of 290mAh. It is engineered for small electronic devices that require a compact, stable power source and low self-discharge for long shelf life. The flat coin format offers straightforward replacement in devices where space is limited, while the chemistry ensures consistent voltage under light to moderate load conditions.

Advantages

This Voltcraft CR 2430 battery delivers predictable performance in low-drain applications, providing steady voltage and long storage life. Its compact dimensions allow easy installation in watches, calculators, key fobs and small sensors. The lithium chemistry gives improved energy density compared with alkaline button cells, resulting in longer operational time for devices with similar power draw. The battery is suitable for maintenance replacement and for keeping memory and real-time clock functions powered when primary power is removed.

Suitable for

• Watches and fitness trackers with compatible battery size
• Calculators and small handheld electronics
• Key fobs, remote controls and car alarm remotes
• Sensors, medical devices and measurement instruments with low-current draw
• Memory backup and real-time clock modules

Key specifications

• Cell type: lithium coin (button) cell
• Nominal voltage: 3 V
• Typical capacity: 290 mAh
• Intended use: low to moderate drain devices and memory backup
• Physical format: flat, round coin cell suitable for devices using CR2430 size
• Storage characteristics: low self-discharge for extended shelf life

How to use

Check the device manual or existing battery marking to confirm CR2430 compatibility before installation. Observe correct polarity when inserting the battery: the positive side (marked) should face the indicated terminal. Use a non-metallic tool or tweezers where possible to avoid shorting. After insertion, ensure the battery compartment is closed properly to maintain contact and to protect against moisture and dust. Dispose of the spent battery according to local regulations for lithium cells and replace with an identical type to preserve device functionality.

Usage recommendations

Store spare batteries in a cool, dry place away from direct sunlight and metallic objects. Avoid exposing the battery to high temperatures or open flame. Do not attempt to recharge, disassemble or puncture the cell. When replacing batteries in memory-backed devices, perform replacement quickly if possible to prevent loss of stored settings; consider using an external backup if immediate replacement cannot be guaranteed.