Murata SR44/W/SW (357/303) - Made in Japan

1.55V Silver Oxide

5 Pieces per Blister Pack

Murata has been the sole manufacturer of Sony branded watch batteries since the acquisition of Sony’s micro battery business in 2017. With the introduction of the SR series, Murata has launched its own line-up of micro-batteries for watches. Murata is known for being the world's first mercury-free silver watch battery innovator, highly recognized as No. 1 market share manufacturer by major watch brands.

Silver Oxide (SR) Battery with high reliability & technical performance

■Development of the world’s first mercury-free silver oxide battery in 2004

■ Unique manufacturing process for strong anti-leakage performance

■ Cumulative production total of over 10 billion units

Murata’s button batteries have superior anti-leakage performance thanks to its unique sealing material and technology. Our patented “J-shaped gasket” was invented as a unique sealing solution to maintain air pressure inside the battery. Optimization of the gasket shape results in the reduction of leakage risks during long-term storage.