1 Hardware Overview
1.6 Batteries
1-16
Portege 2000 Maintenance Manual (960-333)
1.6.2 Battery Charging Control
Battery charging is controlled by a power supply microprocessor. The power supply
microprocessor controls power supply and detects a full charge when the AC adaptor and
battery are connected to the computer. The system charges the battery using quick charge or
trickle charge.
❑
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
Charging Time
Normal charge
About 2 to 4 hours
Quick charge
About 2 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
❑
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
Time
Charging
AC adapter or main battery in use
8 hours (approx )
Data preservation time (when fully charged) 1
month
Summary of Contents for Portege 2000
Page 9: ...Chapter 1 Hardware Overview ...
Page 10: ...1 Hardware Overview 1 ii Portege 2000 Maintenance Manual 960 333 1 Hardware Overview ...
Page 30: ...1 Hardware Overview 1 7 AC Adapter 1 18 Portege 2000 Maintenance Manual 960 333 ...
Page 31: ...Chapter 2 Troubleshooting Procedures ...
Page 32: ...2 Troubleshooting Procedures 2 ii Portege 2000 Maintenance Manual 960 333 2 ...
Page 36: ...2 Troubleshooting Procedures 2 vi Portege 2000 Maintenance Manual 960 333 ...
Page 87: ...Chapter 3 Tests and Diagnostics ...
Page 88: ...3 Tests and Diagnostics 3 ii Portege 2000 Maintenance Manual 960 333 3 ...
Page 147: ...Chapter 4 Replacement Procedures ...
Page 148: ...4 Replacement Procedures 4 ii Portage 2000 Maintenance Manual 960 333 4 ...
Page 215: ...Appendices ...
Page 216: ...Appendices App ii Portege 2000 Maintenance Manual 960 333 ...
Page 222: ...Appendices App viii Portege 2000 Maintenance Manual 960 333 ...
Page 228: ...Appendices Apx A Handling the LCD Module A 6 Portege 2000 Maintenance Manual 960 333 ...
Page 264: ...Appendices Apx E Key Layout E 2 Portege 2000 Maintenance Manual 960 333 ...
Page 266: ...Appendices Apx F BIOS KBC EC Update F 2 Portege 2000 Maintenance Manual 960 333 ...
Page 268: ...Appendices Apx G Reliability G 2 Portege 2000 Maintenance Manual 960 333 ...
Page 270: ...Appendices Apx H Key FD H 2 Portege 2000 Maintenance Manual 960 333 ...