Toshiba M200-ST2002 Maintenance Manual - Page 31

1.6 Batteries 1 Hardware Overview q Quick Battery Charge When the AC adapter is connected, normal charging is used while the system is turned on and quick charge is used while the system is turned off or in suspend mode. (See Table 1-7) Table 1-7 Time required for charges of main battery Normal charge Quick charge Charging Time About 3 to 10 hours or longer About 2.5 hours Quick battery charge is stopped in the following cases. 1. The main battery is fully charged 2. The main battery is removed 3. Main battery or AC adapter voltage is abnormal 4. Charging current is abnormal q Trickle charge When the main battery is fully charged and the AC adapter is plugged in, the power supply microcontroller automatically switches from quick charge to trickle charge. 1.6.3 RTC Battery The RTC battery provides the power supply to maintain the date, time, and other system information in memory. Table 1-8 lists the battery charging time and data preservation times. Table 1-8 RTC battery charging/data preservation time Charging time AC adapter or main battery in use (Power ON) Data preservation time (when fully charged) Time 8 hours (approx.) 1 month Portege M200 Maintenance Manual (960-457) 1-17