Maxell SR621SW Battery – Compact, Precise Power for Watches and Medical Devices

The Maxell SR621SW battery is a premium 1.55V silver oxide cell designed for low-drain devices that require steady, long-lasting power. Known for its compact size and exceptional performance stability, it is a preferred choice for quartz watches, small medical devices, and delicate electronics. With Maxell’s strict quality standards, the SR621SW delivers dependable energy, excellent leak resistance, and a long shelf life, ensuring accuracy and reliability in every application.

Understanding the Maxell SR621SW Silver Oxide Battery

Measuring 6.8mm in diameter and 2.1mm in height, the SR621SW is one of the most widely used watch batteries on the market. Its silver oxide chemistry provides a consistent voltage output over time, ensuring accurate timekeeping and reliable device operation from start to finish.

Core Specifications

• Model: Maxell SR621SW
• Voltage: 1.55 Volts
• Capacity: Approximately 16 mAh
• Chemistry: Silver Oxide
• Diameter: 6.8 mm
• Height: 2.1 mm
• Weight: Around 0.36 grams
• Operating Temperature: -10°C to +60°C

Why Choose the Maxell SR621SW?

The Maxell SR621SW silver oxide watch battery is engineered to deliver precise, stable voltage over an extended period, making it ideal for timekeeping devices and precision electronics. Its leak-resistant design helps protect valuable equipment from damage.

Key Advantages

1. Steady Voltage Output: Maintains consistent 1.55V for accurate performance.
2. Compact Form: Fits seamlessly in small electronic compartments.
3. Reliable Shelf Life: Can be stored for years without significant capacity loss.
4. Leak Resistance: Protects sensitive device components.
5. Trusted Brand Quality: Backed by Maxell’s strict production standards.

Common Applications for the Maxell SR621SW

Its small size and dependable performance make the SR621SW battery an excellent choice for many compact electronics.

1. Quartz Watches

The long-lasting 1.55V battery for quartz watches ensures accurate timekeeping and extended battery replacement intervals.

2. Medical Devices

The reliable SR621SW battery for medical devices powers tools such as digital thermometers and diagnostic instruments.

3. Small Electronic Gadgets

Common in pedometers, small remotes, and fitness trackers.

4. Calculators

Provides stable energy for school, office, and professional use.

5. Precision Measuring Tools

Powers devices like calipers and micrometers that require consistent voltage for accuracy.

Performance and Reliability

Maxell’s SR621SW is designed to perform in low-drain devices, ensuring long battery life without sacrificing performance. Its silver oxide chemistry gives it an advantage over alkaline button cells, especially for precision electronics.

Voltage Stability

Keeps a near-constant 1.55V for most of its usable life, preventing performance drops in timekeeping devices.

Temperature Performance

Functions reliably between -10°C and +60°C, suitable for everyday wear and use.

Comparing the SR621SW to the SR626SW

The SR621SW is thinner than the SR626SW, making it suitable for ultra-slim watches and compact devices where height is limited.

Battery Type	Diameter	Height	Voltage	Capacity	Common Uses
SR621SW	6.8 mm	2.1 mm	1.55V	~16 mAh	Watches, medical devices
SR626SW	6.8 mm	2.6 mm	1.55V	~28 mAh	Watches, calculators, instruments

Storage and Handling Tips

Store SR621SW batteries in a cool, dry environment away from direct sunlight. Keep them in their original packaging until ready for use to prevent discharge or short-circuiting.

How to Replace an SR621SW Battery

1. Open the battery compartment using the correct tool.
2. Note the battery’s polarity before removal.
3. Insert the new Maxell SR621SW with correct orientation.
4. Secure the compartment and test the device.

Environmental Responsibility

Dispose of SR621SW batteries at certified recycling locations. Silver oxide cells should not be thrown in household waste due to their materials.

Conclusion

The Maxell SR621SW battery is a compact, dependable power source for quartz watches, medical devices, and precision electronics. With stable voltage output, excellent leak resistance, and long shelf life, it ensures your devices run smoothly and accurately. Whether it’s keeping time, measuring precisely, or providing critical data, the SR621SW delivers unmatched reliability in a small package.