Renata 335 (SR512SW) — Ultra-Thin Precision Power for Slim Watches

The Renata 335 (SR512SW) is a silver-oxide button cell specifically engineered for ultra-slim watches and precision devices where space is limited. With a mere ~1.2 mm height and ~5.8 mm diameter, it offers reliable 1.55 V power in a form factor small enough to fit the thinnest watch movements without compromising timekeeping accuracy or movement safety.

Core Specifications

• Chemistry: Silver-oxide, mercury-free
• Nominal Voltage: 1.55 V
• Dimensions: 5.8 mm × 1.2 mm
• Drain Profile: Low-drain (SW)
• Compliance: RoHS, mercury-free

Understanding SR512SW

• SR: Silver-oxide chemistry, round cell
• 512: Size designation (~5.8 mm × 1.2 mm)
• SW: Low-drain, designed for analog watches

This code ensures the battery’s dimensions and electrical profile match devices specifically built for this size category.

Why Choose the Renata 335?

1. Ultra-Thin Profile: Perfect for watches with minimal clearance between the movement and caseback.
2. Stable Voltage: Consistent 1.55 V output maintains timekeeping accuracy.
3. Swiss Quality: Renata’s precision manufacturing ensures reliability.
4. Leak-Resistant: Protects sensitive watch mechanisms from electrolyte damage.
5. Low Self-Discharge: Maintains charge during extended storage.

Common Applications

• Luxury ultra-thin dress watches
• Vintage and collectible slim timepieces
• Specialized instruments with tight space constraints

Handling and Installation Tips

• Confirm the device specifies SR512SW before replacing.
• Use non-metal tweezers to prevent short circuits.
• Inspect and replace gaskets if water resistance is required.
• Check polarity before seating the battery.

Performance and Lifespan

In low-drain analog watches, the Renata 335 offers predictable service intervals. Consistent discharge and minimal self-discharge ensure the watch runs accurately until the cell approaches depletion.

Storage Recommendations

• Keep in original packaging until installation.
• Store in a cool, dry location.
• Rotate stock based on manufacturing date codes.

Conclusion

The Renata 335 (SR512SW) is the professional’s choice for powering the slimmest analog watches. Its stable voltage, precise dimensions, and Swiss manufacturing quality make it an ideal solution for delicate, space-restricted designs.