Single-use battery Panasonic SR-721

The Panasonic SR-721 is a single-use coin battery with a nominal voltage of 1.55 V and a rated capacity of 25 mAh. With compact dimensions of approximately 7.9 mm in diameter and 2.1 mm in height and a weight of about 0.0004 kg, this cell is intended for small electronic devices that require a stable low-current power source. The battery chemistry and construction provide consistent output suitable for timekeeping and low-drain applications.

Advantages

The SR-721 offers a stable 1.55 V output and compact size that fits many standard coin-cell compartments. Its single-use design delivers reliable shelf life and predictable performance until end of service. The cell’s small form factor and low weight make it suitable for lightweight devices where space and mass are limited.

Key specifications

• Battery type: single-use coin cell
• Nominal voltage: 1.55 V
• Rated capacity: 25 mAh
• Diameter: 7.9 mm (approx.)
• Height/thickness: 2.1 mm (approx.)
• Weight: ~0.0004 kg

How to use

Before installation, ensure the device is powered off and that the battery compartment is clean and free of debris. Match polarity markings and seat the coin cell in the holder so that the positive side faces the indicated direction. After installation, verify device operation and close the battery compartment securely. Replace with the same battery type and voltage when performance degrades.

Recommendations

Store Panasonic SR-721 cells in a cool, dry place away from direct sunlight and metal objects. Dispose of used batteries according to local regulations and avoid short-circuiting, disassembling, or exposing the cell to fire. For critical medical or safety devices, confirm manufacturer compatibility and replacement intervals before use.