The Seizaiken 371 (SR920SW) is a premium 1.55V silver oxide button cell battery, manufactured by Seiko Instruments Inc. (SII) in Japan. Specifically engineered for quartz watches and precision small electronics, this battery delivers stable voltage output and dependable long-term performance. Designed for low-drain applications, the SR920SW provides consistent power while maintaining accurate timekeeping. With a compact size of 9.5mm diameter and 2.1mm height, it fits a wide range of watch models and small electronic devices. Manufactured at Seiko’s advanced facility in Sendai, Tohoku (Japan), this battery reflects decades of expertise in precision metal processing and watchmaking technology. Its airtight seal structure ensures excellent leakage resistance, enhancing safety, durability, and reliability.
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3.7V 200mAh small size lipo Rechargeable Battery 501522 for MP3 bluetooth earphone bracelet watch pen MID headset headphon
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Renata Watch Batteries in all sizes, including 377, 395, 390, CR2032, CR2025, CR2016, 1632. Reliable power for watches, key fobs, and small devices .
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Our full premium range by Renata includes popular Silver Oxide (SR series) sizes, so you can choose the exact battery your watch requires from the options above. Check the number printed on your old battery (for example 377, 364, 371) and select the matching size from the dropdown list above.
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Occasionally we may have to subsitute for different Renata Packaging on some sizes in case of supply variation. The item supplied will still be Genuine Renata, sourced from the UK official wholesale suppliers. Wherever possible we will update the pictures to reflect actual packaging. Please note that size 335 and 337 are made in Japan now.
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Renata coin batteries come with over 40 different watch battery types. RENATA has first-hand knowledge of what a high-quality watch battery must stand for. .
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RENATA long-life silver oxide watch batteries. Swiss-made by Renata, part of the Swatch Group. The sizes made in Japan are 335, 337 and 346. All other sizes are Swiss made. The UK's Watch Strap Specialist.
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5 x Single Renata Batteries. Constant availability.
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These batteries are STILL amongst the finest watch batteries available. Very High Quality Japanese Made Watch Batteries.
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