LTC-16M-S2 : Eagle Picher 3.5V 1.6Ah THIONYL CHLORIDE Keeper Lithium Cell with Axial Leads - Every Battery Pty Ltd
LTC-3PN-S2 Meter Lithium Keeper Battery 3.5v 350mAh - $17.30
LTC 7PN S4 Heidelberg SM102 8 P5 Printing Machine Battery 3.5V Lithium Battery for Keeper made in Korea|Primary & Dry Batteries| - AliExpress
Eagle Picher LTC 7PN S4 Memory Back Up Real Time Clock Battery with Solder Pin BL 7PN S4 3.5V Lithium Battery for KEEPER|Primary & Dry Batteries| - AliExpress
2PCS EF651625 for Heidebao Printer Memory Battery LTC 7PN S4 3.6V Lithium Battery for EVE Keeper|Replacement Parts & Accessories| - AliExpress