Button cell battery RENATA CR2477N 3 V lithium 950 mAh — coin cell

RENATA CR2477N 3 V lithium 950 mAh — coin cell is a compact, single-cell power source designed for applications that require steady voltage and long shelf life. The cell delivers a nominal 3 volts and a rated capacity of 950 mAh, making it suitable for devices that need reliable primary or backup power over extended periods. Its button/coin form factor allows installation in tight compartments and standard battery holders used in small electronics.

Advantages

This lithium button cell provides stable terminal voltage over most of its discharge curve and a relatively high capacity for its size, enabling longer operation between replacements. The low self-discharge rate contributes to extended shelf life and dependable standby power. Its standardized dimensions ensure compatibility with many watches, sensors, calculators and other compact devices that accept coin cells.

Suitable for

• Wrist watches and timing devices
• Calculators and small office electronics
• Medical instruments with low to intermittent drain
• Security sensors, smoke and CO alarms (backup/low-drain use)
• Memory backup and CMOS/RTC backup in electronics

Key specifications

• Chemistry: Lithium manganese dioxide (Li-MnO2) typical for 3 V coin cells
• Nominal voltage: 3 V
• Nominal capacity: 950 mAh
• Cell type: Button / coin cell
• Suitable operating temperature range: typical for lithium coin cells (please consult device specifications for extremes)

How to use

Install the coin cell in the device following the polarity markings: the flat positive side (+) faces up in most holders while the negative side (-) is recessed. Ensure the battery compartment is clean and free of corrosion or debris before inserting the cell. For devices with a spring or clip contact, press gently to seat the battery fully. Replace batteries in pairs or per manufacturer guidance for devices that require multiple cells. Dispose of used lithium cells according to local regulations; do not incinerate or attempt to open the cell.

Usage recommendations

Store unused cells in a cool, dry place away from metal objects to prevent short circuits. For devices with continuous high current draw, verify that the coin cell chemistry and capacity are appropriate; for high-drain applications, consider alternative battery types recommended by the device manufacturer. When installing, avoid touching the battery surfaces with bare hands for extended periods to reduce risk of contamination and corrosion.