Seizaiken SEIKO 384 SR41SW Silver Oxide Watch Battery 1.55V Made in Japan

Precision in miniature – the Seizaiken / SEIKO 384 SR41SW silver oxide watch battery delivers a stable 1.55V voltage for elegant ladies' and men's watches as well as high-quality precision instruments in a compact 7.9mm format. With a height of only 3.6mm, this button cell is ideal for slim, modern watch movements and flat designs where space saving and a constant power supply are equally important.

As a brand of Seiko Instruments, Seizaiken batteries are 100% manufactured in Japan and are recognized worldwide by professional watchmakers for their exceptional reliability, leak-proof construction, and extremely stable voltage curves. The silver oxide chemistry ensures consistent performance throughout its lifespan—no sudden voltage drops like with alkaline batteries—making it the preferred choice for high-end automatic watches, elegant ladies' watches, and medical watch instruments. With numerous compatibility designations (384, SR41SW, AG3, G3, and others), this battery offers a flexible and reliable professional solution for workshops, watchmakers, and discerning end users.

Key features:

• Seizaiken / SEIKO 384 SR41SW Silver Oxide Watch Battery, 1 piece in blister pack

• Chemistry: Silver oxide (Ag2O) – stable voltage and long operating time for watches

• Nominal voltage: 1.55V – constant supply for precise quartz movements

• Compact dimensions: diameter 7.9 mm, height 3.6 mm – ultra-flat watch format

• Made in Japan – Seiko Instruments quality manufacturing to the highest standards

• High reliability and excellent leak-proofness thanks to optimized sealing.

• Specifically designed for elegant watches – ideal for ladies' and men's watches

• Very stable voltage curve – no sudden drop in performance over time

• 0% mercury – modern, environmentally conscious silver oxide technology

• Genuine Seizaiken / Seiko brand product – preferred by professional watchmakers worldwide

• Wide compatibility: 384, SR41SW, SR41, AG3, G3, LR41, LR736 and other equivalents

Advantages & Applications:

• Elegant women's watches: Slim designs with modern flat movements – perfect power supply

• Men's watches: High-quality automatic watches and classic models – reliable performance

• Medical & Laboratory Clocks: Precision Chronometers, Measuring Clocks, Clinical Timepieces

• Jewelry watches: Small, elegant versions with limited space for a battery.

• Vintage & Classics: Restoration of old watch models with original SR41 format

• Wellness & Sport: Fitness watches, running chronometers with elegant design

• Precision instruments: miniature timepieces, portable measuring devices, digital miniature displays

• High-quality gift watches: Elegant presents with a constant, reliable power supply

• Japanese Quality Guarantee: Seiko Instruments manufacturing standard for maximum durability

• Professional workshops: First choice for watchmakers and repair specialists

• Long-term stability: Silver oxide chemistry prevents voltage drop over months and years.

• Safe storage: Long shelf life without leakage or loss of function