CR2450 3 volt lithium coin cell style battery used on the MPU/CPU in some Zaccaria pinball machines.
Specs
Chemistry: Lithium
Voltage: 3V
Battery Size: CR2450
Capacity: 610 mAh
Diameter: 0.965" 24.5mm
Height: 0.197" 5.0mm
Reference:
CR2450
Citizen 280-205
Duracell DL2450
Energizer CR/BR2450 or ECR2450
Maxell CR/BR2450
Rayovac CR2450N
Seiko SB-T15
Varta CR2450
I.E.C CR2450 IEC CR2450
ANSI 5029LC