Maxell 379 SR521SW Silver Oxide Watch Battery Made in Japan

A reliable power source for your precious watch – the Maxell 379 SR521SW silver oxide watch battery delivers a stable 1.55V voltage for high-quality wristwatches and precision instruments. The ultra-compact button cell, measuring 5.8mm in diameter and 2.2mm in height, is ideal for elegant ladies' watches, thin quartz movements, and other precision applications where reliability in a compact space is essential.

As a Japanese battery manufacturer with over 70 years of experience, Maxell is known worldwide for high-quality silver oxide batteries that reliably power demanding watches for years. The silver oxide chemistry ensures more consistent performance and longer runtimes than inexpensive alkaline cells – ideal for watches that require long-term, accurate timekeeping. With numerous compatibility designations, this cell replaces many common 379/SR521SW/AG0 types and offers a proven professional solution for workshops and watch enthusiasts.

Key features:

• Maxell 379 SR521SW 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 5.8 mm, Height 2.2 mm – Compact size SR521SW/379

• Made in Japan – Maxell quality manufacturing with years of expertise

• 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

• Maxell brand product – trusted & recommended by watchmakers worldwide

Advantages & Applications:

• Ideal for elegant ladies' watches, pocket watches and thin quartz movements

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

• Ultra-compact format – perfect for slim watch models

• Long operating time and stable voltage for precise timekeeping over many months

• Japanese manufacturing quality – preferred by professional watchmakers

• Direct replacement for many 379/SR521SW/AG0/G0 batteries – high compatibility

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

• Safe storage and long shelf life without leakage

• Reliable performance in elegant women's and luxury watches

• Saves on costly watch repairs due to long operating life