6PCS Original Brand New CR 2/3AZ 3V Lithium PLC battery with connector|Primary & Dry Batteries| - AliExpress
Amazon.co.jp: 3V CR-2/3AZ Part Number SH384552520 Replacement Battery for Panasonic Housing Fire Alarm Battery, Lithium Battery for Kemuri and Netsu Batteries, Set of 2 : Home & Kitchen