377 Renata Watch Battery (SR626SW) 1.55V Silver Oxide

The Renata 377 (SR626SW) is the horological industry's benchmark 1.55V silver oxide button cell. Manufactured in Switzerland by Renata SA (The Swatch Group), this delivers uncompromised reliability, optimal capacity retention, and flawless manufacturing consistency across every production batch. Featuring a monovalent silver oxide chemistry and a patented laser-welded, leak-proof organic seal, the Renata 377 is specifically designed to provide constant, flicker-free power for low-drain analog quartz watches, precision calipers, medical testing devices, and compact electronic remotes.

• Packaging: Sold in factory-sealed, perforated tear strips of 10 batteries (1 Multi-Pack strip) with holographic authenticity seals. A box contains 100 batteries (10 strips).

• Shelf Life & Freshness: Guaranteed fresh factory date codes with 3 to 5 years of shelf life under recommended storage conditions.

Key Features & Reliability

• Authentic Swiss Made Precision: Manufactured by Renata SA (A Swatch Group Company) under strict ISO 9001/14001 horological standards.

• 0% Mercury: Built with 0% mercury engineered to maintain a flat discharge curve and peak energy density throughout its service life.

• Anti-Leak Seal Technology: Proprietary casing construction and organic sealants prevent electrolyte creep, protecting expensive movement bridges, coils, and circuit boards from corrosion.

• Ultra-Low Self-Discharge: Delivers steady, reliable amperage over years of continuous operation without erratic second-hand stutter or timing loss.

• Low-Drain Profile: Specifically engineered for standard 2-hand and 3-hand analog quartz watches without high-load alarms or LED backlights.

Technical Specifications:

• Manufacturer: Renata SA (The Swatch Group) – Itingen, Switzerland

• Battery Model / Size: 377 / SR626SW (Low Drain)

• Standardization: IEC 60086-3 / JIS SR626SW

• Chemical System: Zinc / Silver Oxide, 0% Mercury

• Nominal Voltage: 1.55 V

• Nominal Capacity: 24.0 mAh (Continuous discharge over 34.8 kΩ at 20°C to 0.90V / 1.20V cut-off)

• Drain Classification: Low-Drain (Optimized for 2-hand and 3-hand analog quartz watches)

• Self-Discharge Rate: < 5% per year at 20°C (68°F)

• Dimensions: 6.80 mm Diameter × 2.60 mm Height (0.268" × 0.102")

• Average Weight: 0.35 g – 0.40 g

• Operating Temperature Range: -10°C to +60°C (14°F to 140°F)

• Packaging Format: 10 Batteries per Strip | 100 Batteries per Box

Cross-Reference & Interchangeability

• IEC / JIS Standard: SR626SW, SR626, SR66

• Energizer / Eveready: 377, 377/376 Multi-Drain

• Maxell: SR626SW

• Sony / muRata: SR626SW, 377

• Seiko: SB-AW

• Citizen: 280-39

• Varta / Bulova: V377, 565, 606

• Duracell: D377, D377B

• Timex: Type BA, Type MA

• Rayovac / Panasonic: 377, SP377, SR626SW

• Alkaline Equivalents (Fit-Compatible): AG4, LR626, LR66, 177, 377A, G4, GP377

Non-Horological Applications & Device Utility

In addition to wristwatches, this 6.8 × 2.6 mm 1.55V button cell powers a wide range of precision compact electronics requiring continuous, stable low-drain voltage:

• Precision Measurement: Digital dial indicators, digital vernier calipers, micrometers, and precision bench thickness gauges

• Medical Equipment: Blood glucose monitors (glucometers), digital clinical thermometers, pulse oximeters, and diagnostic meters

• Automotive & Access Security: Keyless entry remotes, car alarm fobs, and security gate transmitters

• Optics & Illumination: Laser pointers, bore sighters, firearm optical sights, and miniature inspection LED torches

• Consumer Electronics: Calculators, pedometers, digital timers, and portable electronic testing instruments

Installation & Handling Guidelines

• Handling: Always use non-magnetic brass, plastic, or carbon-fiber-tipped tweezers during installation. Avoid steel tweezers bridging positive and negative terminals, which causes an instantaneous micro-short and depletes capacity.

• Cleaning: Wipe cell surfaces with a clean, lint-free watchmaker tissue prior to installation to ensure zero oil or skin residue interferes with the movement battery bridle.

• Storage: Store in original blister strips in a cool, dry environment at 10°C–22°C (50°F–72°F) away from direct sunlight and high humidity.

Price per Battery - Sold in Pack of 10 Pieces.