1.7 Batteries
1 Hardware Overview
TECRA M4 Maintenance Manual (960-521)
[CONFIDENTIAL]
1-33
1.7.2 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 adapter and
battery are connected to the computer.
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 standby mode.
Table 1-14 lists the main battery charging time.
Table 1-14 Time required for charges of main battery
Charging Time
Battery Capacity
Normal charge
Quick charge
Main (4700mAh)
about 5.5 to 13.0
about 3.0
Second (3600mAh)
about 4.0 to 9.5
about 3.0
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
Data preservation time
When turning off the power in being charged fully, the preservation time is as
following Table 1-15.
Table 1-15 Data preservation time
Condition preservation
time
Standby mode
About 5 days
Main (4700mAh)
Boot mode
About 40 days
Standby mode
About 4 days
Second
(3600mAh)
Boot mode
About 30 days
Summary of Contents for Tecra M4
Page 10: ...x CONFIDENTIAL TECRA M4 Maintenance Manual 960 521 ...
Page 11: ... CONFIDENTIAL Chapter 1 Hardware Overview ...
Page 12: ...1 Hardware Overview 1 ii CONFIDENTIAL TECRA M4 Maintenance Manual 960 521 1 Hardware Overview ...
Page 51: ...1 Hardware Overview 1 8 AC Adapter 1 36 CONFIDENTIAL TECRA M4 Maintenance Manual 960 521 ...
Page 52: ... CONFIDENTIAL Chapter 2 Troubleshooting ...
Page 53: ...2 Troubleshooting 2 ii CONFIDENTIAL TECRA M4 Maintenance Manual 960 521 2 ...
Page 57: ...2 Troubleshooting 2 vi CONFIDENTIAL TECRA M4 Maintenance Manual 960 521 ...
Page 114: ... CONFIDENTIAL Chapter 3 Tests and Diagnostics ...
Page 115: ...3 Tests and Diagnostics 3 ii CONFIDENTIAL TECRA M4 Maintenance Manual 960 521 ...
Page 119: ...3 Tests and Diagnostics 3 vi CONFIDENTIAL TECRA M4 Maintenance Manual 960 521 ...
Page 223: ...3 Tests and Diagnostics 3 30 SETUP 3 104 CONFIDENTIAL TECRA M4 Maintenance Manual 960 521 ...
Page 224: ... CONFIDENTIAL Chapter 4 Replacement Procedures ...
Page 225: ...4 Replacement Procedures 4 ii CONFIDENTIAL TECRA M4 Maintenance Manual 960 521 4 ...
Page 300: ...4 Replacement Procedures 4 29 Digitizer 4 70 CONFIDENTIAL TECRA M4 Maintenance Manual 960 521 ...
Page 320: ... CONFIDENTIAL Appendices ...
Page 321: ...Appendices App ii CONFIDENTIAL TECRA M4 Maintenance Manual 960 521 ...
Page 341: ...Appendices Appendix B Board Layout B 8 CONFIDENTIAL TECRA M4 Maintenance Manual 960 521 ...
Page 379: ...Appendices Appendix E Key Layout E 2 CONFIDENTIAL TECRA M4 Maintenance Manual 960 521 ...
Page 387: ...Appendices Appendix I Reliability I 2 CONFIDENTIAL TECRA M4 Maintenance Manual 960 521 ...