Cause:
Like any battery the computer CMOS battery can fail or lose its charge.

Solution:
If your computer is losing its time or date settings�� or you are receiving a message CMOS Read Error�� CMOS checksum error�� or CMOS Battery Failure�� first try leaving the computer on for 24-hours. In some cases this can charge the battery and resolve your issue. This often resolves CMOS battery related issues when a computer has been left off for several months. 


Compatible with the models :

PORTEGE 4000 
PORTEGE 4000CT 
PORTEGE 4005 
PORTEGE  4010 
 
TECRA M1 
TECRA 9000 
TECRA 9100 
 
SATELLITE PRO 6000 14.1" LCD 
SATELLITE PRO 6000 15.0" LCD 
SATELLITE PRO 6100 14.1" LCD 
SATELLITE PRO 6100 15.0" LCD 
 
Replace Battery Model:CB18


Package : 1 pcs of CMOS battery