Toshiba Portege M100 Maintenance Manual - Page 34

1.8 Batteries 1 Hardware Overview 1.8.3 Battery Charging Control Battery charging is controlled by a power supply microprocessor mounted on the system board. The power supply microprocessor controls whether the charge is on or off and detects a full charge when the AC adaptor and battery (both Main battery and 2nd battery) are attached to the computer. The system charges the battery using quick charge or trickle charge. q Battery Charge When the AC adaptor is attached, battery Charge starts. The times required for quick charges are listed in Table 1-8. Table 1-8 Time required for quick charges Status Power off Power on Charging time Main Battery 2nd Battery 2.5 hours 2.5 hours 4 to 12 hours or longer 4 to 12 hours or longer NOTE: The time required for quick charge when power is on is affected by the amount of power the system is consuming. Use of the fluorescent lamp and frequent disk access consumes power and lengthens the charge time. If any of the following occurs, the battery charge process stops. 1. The battery becomes fully charged. 2. The AC adaptor or battery is removed. 3. The AC adaptor or battery voltage is abnormal 4. The charging current is abnormal. PORTEGE M100 Maintenance Manual (960 -452) 1-19