Amazon.co.jp: KEEPPOWER SH384552520 CR-2/3AZ Panasonic Compatible Dedicated Lithium Battery (Replacement for Home Fire Alarm) (2 Pieces) : DIY, Tools & Garden
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2pcs Original Brand New Cr-2/3az 3v Cr17335 Lithium Plc Battery With White Connector (customizable Plug) - Primary & Dry Batteries - AliExpress
Amazon.co.jp: Set of 2: 3V CR-2/3AZ, Part Number SH384552520 Replacement Batteries, Panasonic Home Fire Alarm, Lithium Battery for Current and Neutral : Home & Kitchen