Toshiba Tecra A8 Maintenance Manual - Page 43

1.7 Batteries 1 Hardware Overview 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. ‰ Data preservation time When turning off the power in being charged fully, the preservation time is as following Table 1-11. Table 1-11 Data preservation time Battery type Main battery (3,600 mAh) Main battery (4,700 mAh) Standby mode 5 days 6 days Boot mode 65 days 80 days 1.7.2 RTC battery The RTC battery provides power to keep the current date, time and other setup information in memory while the computer is turned off. Table 1-12 lists the charging time and data preservation period of the RTC battery. Table 1-12 RTC battery charging/data preservation time Status Charging Time (power on) Data preservation period (full charge) Time 8 hours 30 days TECRA A8 /Satellite Pro A120 Maintenance Manual (960-573) [CONFIDENTIAL] 1-29