Your battery pack should be useful
for approximately 300 charge-discharge cycles.
The number of years or charge-discharge cycles
might vary depending on how efficiently you use your computer.
This section describes the following:
- How to use the power management modes
- How to decrease the LCD brightness
You can run your computer on battery power for a considerable
time by using the power management modes
(standby mode, suspend mode, and hibernation mode).
Note: |
Even if you don't set the low-battery alarm, the charge indicator will let you know when the
battery is low, and then your computer will automatically enter the power-saving mode.
This default low-battery behavior is independent
of the operating system, so the computer might
behave differently from your setting if you set the low-battery alarm.
The computer chooses appropriately between your setting and the default setting.
|
Attention |
---|
Do not enter suspend or hibernation mode
when your computer is doing any of the following:
- Playing or recording audio
- Playing a movie
- Playing a game
- Running any other multimedia application
Stop these applications before entering suspend or hibernation mode.
|
- Standby mode
For Windows 98 Users:
The LCD and external monitor turn off. Also the audio is muted.
If no application program is running in the background,
the hard disk stops turning.
|
For Windows 95 Users:
The LCD turns off.
Also, if a power-saving monitor (Energy Star Monitor)
is in use when the computer enters standby mode, the computer
activates the monitor's low-power mode.
|
You can enter standby mode by:
- Pressing the Fn + F3 keys.
You can return to normal operation by:
- Pressing any key or moving the TrackPoint.
- Suspend mode
Your computer stops all tasks and stores all data in memory.
You can enter suspend mode by:
- Pressing the Fn + F4 keys.
- Closing the cover.
If you select the
Will not suspend even if LCD is closed check box in the
"Power Management Properties" window, the computer does not enter
suspend mode when the LCD is closed. Only the LCD turns off.
- Selecting the Suspend button
() in the Fuel-Gauge program.
- For Windows 98 users:
Click Start and Shut Down.., and then
select Stand by by clicking the radio button.
Note: |
The term Stand by on the Windows 98 screen
has a different meaning from the term standby
in the user's manuals.
|
Your computer automatically enters suspend mode when:
- The preset timeout is reached.
Note:
For Windows 98 users:
You can set the System standby timer
in the "Power Management Properties" window.
For Windows 95 users:
You can set the Suspend Timer
in the "Power Properties" window.
- The battery is low.
Note:
For Windows 98 users:
You can set the alarm action by specifying Standby
for the prompt
When the alarm goes off, the computer will:
For Windows 95 users:
If you select the Hibernate when battery
becomes low check box in the "Power Management Properties"
window, the computer enters hibernation mode when the battery is low.
You can return to normal operation by:
- Pressing the Fn key.
- Opening the LCD.
- Turning the power switch on.
Your computer automatically returns to normal operation when:
RediSafe:
To prevent loss of data during suspend mode
when the battery is critically low,
your ThinkPad computer has a RediSafe function.
Once you set this function,
the hibernation file is activated each time
the computer enters suspend mode; the computer is
ready to enter hibernation mode from suspend mode
whenever the battery is low.
Set RediSafe as following:
From Windows 98 or Windows 95:
- Start the ThinkPad Configuration program.
- Click the Power Management button
().
- Click the Hibernation
- Enable hibernation mode if it is disabled.
- Click the Enable Hibernation.. button.
- Click Create Now and then Close.
- Select the RediSafe check box.
- Click OK.
From Windows NT:
- Start the ThinkPad Configuration program.
- Click the Power Management button
().
- Click the Suspend/Hibernation/Resume Options button
().
- Enable hibernation mode if it is disabled.
- Click the Enable Hibernation.. button.
- Click OK.
- Select the RediSafe check box.
- Click OK.
|
- Hibernation mode
Your computer stops all tasks and stores all data in
the hard disk; then it powers off. Set your computer to this
mode if you want to maintain the present operating condition until the
next day, for instance.
To use this mode, you have to create a hibernation file
with the ThinkPad Configuration program.
(
Enabling hibernation mode.)
You can enter hibernation mode by:
- Pressing the Fn + F12 keys.
- Clicking the Hibernation button
() in the Fuel-Gauge program.
- Turning the power switch off.
You can enable this option by
selecting the Hibernate by power switch
check box in the "Hibernation" subwindow of the
"Power Management Properties" window.
Your computer automatically enters hibernation mode when:
- The preset timeout is reached (Windows 95 user only).
If you select the Hibernate by timer
check box in the "Hibernation" subwindow
and set Suspend timer in the "Power Mode" subwindow,
your computer enters hibernation mode when it reaches the timeout.
- The battery is low.
Note:
For Windows 98 users:
You can set the alarm action by specifying Hibernate
for the prompt
When the alarm goes off, the computer will:
For Windows 95 users:
If you select the Hibernate when battery becomes low check box,
your computer enters hibernation mode when the battery is low.
You can return to normal operation
by turning the power on.
For Windows NT users:
You cannot create a hibernation file in a Windows NT system that uses
the NTFS file format, the Windows NT default.
If you want to use hibernation mode, you should reinstall Windows NT
with the FAT file format.
Notes:
- Windows 95 users
cannot enter hibernation mode when using the communication network.
- Hibernation mode might end if you connect your computer
to a port replicator or if you use a particular PC Card.
The following table shows how the indicator behaves in each power management mode:
Current status
| Indicator
|
Suspend mode
|
Power-on
|
Normal operation
or standby mode
| Off
| Green
|
Suspend mode
| Green
| Off
|
Entering or resuming from suspend mode
| Blinking green
| Green
|
Power off or
hibernation mode
| Off
| Off
|
The following figure shows the relationship between
different power management modes, how to switch between them,
and battery power consumption:
This section describes how to customize
power management so that you are using
the power management mode appropriate to your operation.
To set the suspend timer, do the following:
For Windows 98:
- Start the ThinkPad Configuration program.
- Click the Power Management
() button.
The "Power Management Properties" window appears.
- Click the Power Schemes tab.
The "Power Schemes" window appears.
-
At System standby timers under
Settings for Portable/Laptop power scheme,
specify the timeout value in minutes.
Note: |
You can also set the LCD off timers and
Hard disk off timers.
|
- Click OK.
For Windows 95:
- Start the ThinkPad Configuration program.
- Click the Power Management
() button.
The "Power Properties" window appears.
- Click the Power Mode tab.
The "Power Mode" window appears.
- Select Customized.
The bottom gray portion is displayed in black.
- In the Suspend Timer box,
specify the timeout value in minutes.
- Click OK.
For Windows NT:
- Start the ThinkPad Configuration program.
- Click the Power Management
() button.
Three buttons appear on the right.
- Click the Power Mode Settings
() button.
The "Power Mode Settings" window appears.
- In the Suspend Timer box,
specify the timeout value in minutes.
- Click OK.
To enable hibernation mode, do the following:
For Windows 98 and Windows 95:
- Start the ThinkPad Configuration program.
- Click the Power Management
() button.
The "Power Properties" window appears.
- Click the Hibernation tab.
The "Hibernation" subwindow appears.
- Click Enable Hibernation.
(If you have already created a hibernation file, this button appears
in gray and you cannot click it.)
The "Enable Hibernation" subwindow appears.
- Click Create Now.
- Click Close and then OK.
For Windows NT:
- Start the ThinkPad Configuration program.
- Click the Power Management
() button.
- Click the Suspend/Resume Options
() button.
The "Suspend/Resume Options" window appears.
- Click the Enable Hibernation.. button.
- Click OK.
When you use a power management mode,
you need to consider a few points, especially if you are using
the network.
Consider the following before using
suspend mode:
-
Before playing audio,
it is better to turn off any automatic timers that put the computer
into suspend or hibernation mode.
In addition, it is better to stop playing audio
before entering suspend or hibernation mode.
If the computer enters suspend or hibernation mode, data from a
running audio program might be lost.
- Any attached device, such as a printer or a serial device,
stops running when the computer enters suspend mode.
When you resume normal operation, the output might differ from
what you expect, because the device might be reset or lose its
configuration settings.
- Sometimes you might want to use the computer with the
LCD closed--for example, if an external monitor
and keyboard are used. In such a case, power on the computer
with the LCD closed, or use the ThinkPad Configuration program to
set the computer not to enter suspend mode when the LCD is closed.
- If the computer resumes normal operation
by reaching the ThinkPad Configuration timer setting
or because of an incoming call, only a blank screen is displayed.
To display a power-on password prompt,
press any key or move your pointing device.
- Some cards cannot detect an incoming call
even if they have a ring-resume function.
- While a communication link is active, the computer might not
enter suspend mode.
- You can prevent your computer from entering suspend mode
by doing the following:
- In the "System Properties" window,
click the General tab in the Advanced Power Management
Support area.
- Under Device usage,
select the Disable in the hardware profile check box.
Note:
You must set the Resume on incoming call option
in the ThinkPad Configuration program so the computer
automatically resumes normal operation.
- For Windows 98 and Windows 95:
- Click the Power Management
() button.
- Click the Suspend/Resume options tab.
- Select the Resume on incoming call check box.
- For Windows NT:
- Click the Battery
() button.
- Click the Suspend/Hibernation/Resume options
() button; then select the
Resume on incoming call check box.
Consider the following before using hibernation mode:
- Do not run any other tasks while the hibernation file is being created.
- The computer uses battery power to enter hibernation mode.
Therefore, it reserves some battery power if it
is set to enter hibernation mode when a low-battery condition occurs.
This
can cause the battery operating time to be shorter than the time
publicly stated.
- Do not add or remove memory during hibernation mode.
If you do, the computer resumes from hibernation mode
without recognizing the changed memory
size. To ensure that the computer recognizes
the correct memory size, shut down; then restart your
operating system.
- If the computer is powered with battery power,
it turns power off to the PC Card when entering hibernation mode.
When normal operation resumes, if the PC Card or computer does not
operate, restart the application or computer.
- If you are using some communication cards
and your computer is powered with ac power,
the computer does not enter hibernation mode.
This prevents possible problems from occurring with
communication application programs after the computer returns to
normal operation.
Note: |
If the communication links are still
not reestablished, remove and then reinstall
the PC Card before restarting the system or application program.
|
Install your operating system
with Advanced Power Management (APM),
and install the ThinkPad Configuration program with the
Utility Diskette to use power management mode.
If you are using Windows 98 or Windows 95,
APM is automatically installed
in your computer.
If you are using DOS, APM is automatically installed
in your computer.
To verify that the computer has installed APM correctly, type
power at the command prompt and press Enter.
If a screen similar to the following appears, APM
is successfully installed.
Power Management Status
-----------------------
Setting = ADV: REG
CPU: idle 32% of time.
AC Line Status : OFFLINE
Battery status : High
If not, add the following line to your CONFIG.SYS file, using
a text editor such as the DOS Editor:
DEVICE=C:\DOS\POWER.EXE
Another battery-saving method is to decrease the LCD brightness.
You can use the ThinkPad Configuration program
to decrease the brightness of the
LCD by clicking the LCD
()
button and selecting Normal for Brightness
(battery operation) in the window that appears.
This section provides necessary information
if you are using the computer with a PC Card.