4100 MT (250-5160) Battery Faxback Doc. # 2907 If the computer reports a CMOS or battery failure error, you may need to replace the battery. Contact your Radio Shack store or participating dealer for battery replacement. The battery can be ordered under Part # CS-0261 (3V, CR-1025). Due to the location of the battery, the main logic board must be removed from the chassis to replace the battery. (ALL/jjs-12/10/94)