Backup Battery used on Apple computers as listed below.
Specifications:
Size: 1/2 AA
Voltage: 3.6V
Amp: 1200mAh
Compatible with:
Macintosh Server G4 (AGP Graphics)
Macintosh Server G4 (Digital Audio)
Macintosh Server G4 (Gigabit Ethernet)
Macintosh Server G4 (Mirror Drive Doors)
Macintosh Server G4 (QuickSilver 2002)
Macintosh Server G4 (QuickSilver)
Power Mac G4 (AGP Graphics)
Power Mac G4 (Digital Audio)
Power Mac G4 (FW 800)
Power Mac G4 (Gigabit Ethernet)
Power Mac G4 (Mirrored Drive Door 2003)
Power Mac G4 (Mirrored Drive Doors)
Power Mac G4 (QuickSilver 2002)
Power Mac G4 (QuickSilver 2002ED)
Power Mac G4 (QuickSilver)
Power Mac G4 Cube
Power Mac G5
Power Mac G5 (Early 2005)
Power Mac G5 (June 2004)
Xserve, Xserve (Cluster Node)
Xserve (Slot Load)
Xserve G5
Xserve G5 (January 2005)
eMac, eMac (2005)
eMac (ATI Graphics)
eMac (USB 2.0)
iMac (Early 2001)
iMac (Summer 2000)
iMac (Summer 2000) DV
iMac (Summer 2000) DV Plus
iMac (Summer 2000) DV Special Edition
iMac (Summer 2001)
iMac 350 MHz
iMac 400 MHz DV
iMac 400 MHz DV (Special Edition)
Apple Reference: 922-4028