Seizaiken SEIKO 395 SR927SW Silver Oxide Watch Battery

Precise timekeeping requires a precise power source – the Seizaiken / SEIKO 395 SR927SW silver oxide watch battery delivers a stable 1.55V voltage for high-quality wristwatches and precision instruments. This compact button cell, measuring 9.5mm in diameter and 2.7mm in height, is ideal for elegant standard and men's watches, medium to large quartz movements, and other precision applications where a constant power supply over extended periods is required.

As a brand of Seiko Instruments, Seizaiken batteries are 100% manufactured in Japan and are trusted by watchmakers and service centers worldwide for their high long-term stability, leak-proof design, and consistent voltage curve. The silver oxide chemistry ensures more consistent performance and longer runtimes than alkaline batteries – ideal for watches intended to run reliably for years. With numerous compatibility designations, this battery replaces many common 395/SR927SW/AG7 types, making it a flexible professional solution for workshops and end users.

Key features:

• Seizaiken / SEIKO 395 SR927SW Silver Oxide Watch Battery, 1 piece in blister pack

• Chemistry: Silver oxide – stable voltage and long runtime for watches

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

• Dimensions: Diameter 9.5 mm, Height 2.7 mm – Standard size SR927SW/395

• Made in Japan – Seiko Instruments quality manufacturing

• High reliability and very good leak protection thanks to optimized sealing.

• Specifically designed for watches – suitable for analog and digital models

• Universally applicable in small electronics such as watches, mini-tools and measuring instruments

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

• Original Seizaiken / Seiko brand product – valued by watchmakers worldwide

Advantages & Applications:

• Ideal for standard and men's watches with medium to large quartz movements

• Can be used in other small devices such as mini-timers, thermometers and measuring instruments.

• Large capacity for longer operating times without frequent changes

• Japanese manufacturing quality – preferred by professional watchmakers

• Direct replacement for many 395/SR927SW/AG7/G7 batteries – high compatibility

• Suitable for medium to high load profiles in watches and delicate electronics

• Safe storage and long shelf life without leakage

• Reliable performance in standard, sports and elegance watches

• Saves on costly watch repairs due to long operating life

• Larger format – higher capacity for sophisticated watches