SL561/PT.
Tadiran Batteries
BATTERY, LITHIUM, PCB, HIGH TEMP, 3.6V; Battery Voltage: 3.6V; Battery Size Code: 2/3AA; Battery Technology: Lithium Thionyl Chloride; Battery Capacity: 1Ah; Battery Terminals: PCB Pins; External Diameter: 14.7mm; External Hei
TL-2450.
Tadiran Batteries
NON-RECHARGEABLE BATTERY, LISOCL2, 3.6V; Battery Voltage: 3.6V; Battery Size Code: 1/10C; Battery Technology: Lithium Thionyl Chloride; Battery Capacity: 550mAh; Battery Terminals: Through Hole; External Diameter: 24mm; Extern