SR421SW 348 1. Specifications 2. Dimensions 3. Characteristics Seiko Instruments Inc. Micro Energy Division 8, Nakase 1-chome, Mihama-ku, Chiba-shi , Chiba 261-8507 Japan Tel:(+81) 43-211-1735 FAX: (+81)43-211-8034 12mAh Mercury Free *Data is for reference only and is not guaranteed. Silver Oxide Battery SEIZAIKEN(Mercury-Free) Go to top of page. SII’s mercury-free silver oxide batteries are manufactured in a high-tech clean room environment in a newly constructed factory. This facility was specifically designed for the manufacturing of ultra precision electronic devices and incorporates all new equipment.

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