Maxell SR521SW Battery – Compact Precision for Watches and Devices

The Maxell SR521SW is a high-quality 1.55V silver oxide button cell designed for small, low-drain devices that demand accuracy and longevity. With a diameter of just 5.8 mm and a height of 2.1 mm, this battery is perfect for compact applications like analog watches, medical instruments, and precision electronics. Known for its stable voltage output, leak resistance, and extended lifespan, the SR521SW provides dependable energy where consistent performance is essential.

Maxell SR521SW Battery Specifications

• Model: SR521SW
• Chemistry: Silver Oxide
• Nominal Voltage: 1.55 Volts
• Capacity: ~11 mAh
• Diameter: 5.8 mm
• Height: 2.1 mm
• Weight: ~0.2 grams
• Operating Temperature: -10°C to +60°C

Why Choose the Maxell SR521SW

The Maxell SR521SW silver oxide watch battery delivers long-term reliability for timepieces and miniature electronics. It’s a favorite among watchmakers for its precise power delivery and long shelf life.

Key Benefits

1. Long-Lasting Power: Designed to provide months or years of consistent energy.
2. Stable Voltage Output: Maintains precise performance for accuracy-dependent devices.
3. Leak-Resistant Construction: Protects sensitive electronics from damage.
4. Compact Size: Ideal for small devices with tight battery compartments.
5. Reliable Brand: Backed by Maxell’s stringent quality control.

Applications for the SR521SW

This cell is widely used in both consumer and professional equipment.

1. Watches

The long-lasting SR521SW 1.55V battery for watches powers compact analog timepieces without compromising accuracy.

2. Medical Devices

The reliable SR521SW battery for medical devices supports glucose meters, hearing aids, and portable diagnostic tools where dependable performance is critical.

3. Miniature Electronics

Suitable for small calculators, laser pointers, and precision measurement devices.

Performance and Reliability

As a low-drain silver oxide battery, the SR521SW delivers a flat discharge curve, ensuring nearly constant voltage until the end of its service life. This makes it perfect for devices where steady performance is essential.

Voltage Stability

Provides a consistent 1.55V throughout most of its lifespan, vital for devices sensitive to power fluctuations.

Temperature Tolerance

Operates reliably in environments from -10°C to +60°C, maintaining consistent output in everyday and demanding conditions.

SR521SW vs SR520SW

The SR521SW has a slightly higher capacity than the SR520SW due to its minimal difference in size, making it preferable for devices requiring longer battery life.

Battery Type	Diameter	Height	Voltage	Capacity	Common Uses
SR521SW	5.8 mm	2.1 mm	1.55V	~11 mAh	Watches, medical devices
SR520SW	5.8 mm	2.0 mm	1.55V	~10 mAh	Watches, small electronics

Handling and Storage

Keep SR521SW batteries in a cool, dry place away from heat sources and direct sunlight. Store them in original packaging until ready for use, and keep away from metal objects to prevent short circuits.

Replacing the SR521SW

1. Access the device’s battery compartment using the appropriate tool.
2. Note the correct polarity before removal.
3. Insert the new Maxell SR521SW, matching the polarity as indicated.
4. Close the compartment securely and verify proper operation.

Environmental Considerations

Recycle used SR521SW batteries at approved collection points. Do not dispose of in household waste to ensure proper handling of materials.

Conclusion

The Maxell SR521SW battery is engineered for precision and reliability, making it the ideal power source for watches, medical devices, and compact electronics. Its stable voltage, long life, and leak resistance guarantee dependable performance in critical applications. When consistent energy delivery is essential, the SR521SW stands as a trusted choice for professionals and consumers alike.