Battery-Powered Operation
Note:
When you charge the lithium-ion battery pack, the
battery pack temperature must be at least 10°C (50°F).
You can charge the battery pack when the AC Adapter is connected to the computer and the battery pack is installed. You must charge the battery pack in any of the following conditions:
Note:
When carrying your computer without the AC Adapter, carry
a fully charged battery pack with you for maximum operating time.
| Important |
|---|
| If the battery pack is new or has not been used for a long time, it will not be fully charged with only a single charging. You will have to completely use it up, then recharge it three to six times to maximize battery operating time. |
The following describes how to recharge the battery pack with the AC Adapter when the computer is turned off:
The battery pack charges after approximately 2.5--3.5 hours. (It takes approximately 3.5--9.0 hours when charging while operating the computer.) (Ref #44.)
Replacing the Battery Pack
When the AC Adapter is connected, you can replace the battery pack anytime it is low in power. Without the AC Adapter, the battery pack can be replaced when the computer power is off, or when the computer is in hibernation mode.
| Important |
|---|
|
Using the Battery Status Indicator
Battery power conditions can be determined through the battery status indicator and the Fuel-Gauge program.
The battery status indicator shows the current status of the battery pack (only when the battery is installed).
Observe the battery status indicator
(
)
and compare it
with the following status list to determine the
battery condition:
| Status | Condition | Action Required |
|---|---|---|
| Green | Enough power remains for operation. | -- |
| Orange | The battery pack is being charged. (Only when the AC Adapter is connected.) | -- |
| Blinking orange | The battery pack is almost discharged (low battery). See "Low-Battery Condition" on reference #50. | Do either of the following actions within 5 to 10 minute:
|
| Off |
The battery pack is not installed. or The computer is turned off or is
in suspend mode when the AC Adapter
is not connected.
| You should take the necessary actions when the
blinking orange condition occurs, before the computer
enters suspend mode because of a low-battery condition.
If suspend mode is caused by a low-battery condition, data in the memory can be lost. Do either of the following actions immediately:
|
When the battery pack is low in power,
the battery status indicator
()
starts blinking.
Connect the AC Adapter to the computer, or replace the battery
pack with a fully charged spare.
If you do not take the corrective actions
within about 30 seconds, the
computer will enter suspend mode.
When the battery pack is low in power, the computer makes three short beeps and then three long beeps if the alarm is enabled. The computer enters suspend mode within 30 to 60 seconds. Using the Fuel-Gauge Program
  |
  |
Note:
When you install an operating system, you must also install
the ThinkPad Features program with the
Utility Diskette before the Fuel-Gauge program can be used.
To install the ThinkPad Features program:
"Installing Software".
The Fuel-Gauge program displays the following battery-pack conditions on the screen:
The Fuel-Gauge program is available in OS/2 or Windows. (Ref #52.) When you click on the Fuel-Gauge icon in the ThinkPad Features window, the Fuel-Gauge program appears. When you minimize the program to an icon, every time you press the Fn+F2 key combination, the Fuel-Gauge icon appears or disappears alternately from the screen.
Preserving Battery-Pack Life
To preserve the life of the battery pack:
To save the battery power:
Note:
If you have purchased the computer
with a preinstalled operating system,
Advanced Power Management (APM) is already installed correctly.
Windows NT does not support APM, but the computer provides
a device driver for the Windows NT power management.
The computer has power-management functions built in. No special power-management drivers have to be installed before you use the computer. However, the computer can conserve more power when APM is used.
APM allows you to reduce power consumption when your applications and devices are idle. Each operating system comes with its own APM.
If you are using OS/2, APM is automatically installed on your computer.
If you are using DOS, APM is automatically installed on your computer. To verify that the computer has APM installed correctly, enter 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
|
|
If you are using Windows 3.11, follow these instructions to check and install APM for Windows:
+--------------------------------------------------------------------------------+ |Windows Setup | |=============== | | | |If your computer or network appears on the Hardware Compatibility List | |with an asterisk next to it, press F1 before continuing. | | | |System Information | | Computer: MS-DOS System | | Display: Neo Magic. 800×600 256 small font | | Mouse: Microsoft, or IBM PS/2 | +--------------------------------------------------------------------------------+
If MS-DOS System with APM appears for the item Computer, APM is already installed. Press F3 to exit the setup.
+--------------------------------------------------------------------------------+ |Windows Setup | |=============== | | | |If your computer or network appears on the Hardware Compatibility List | |with an asterisk next to it, press F1 before continuing. | | | |System Information | | Computer: MS-DOS System with APM | | Display: Neo Magic 800×600 256 small font | | Mouse: Microsoft, or IBM PS/2 | +--------------------------------------------------------------------------------+
If you are using Windows 95, APM is automatically installed on your computer. To verify that the computer has APM installed correctly, do the following:
If not, select Advanced from the pull-down menu.
Adjust the
brightness control (
)
on the LCD
to the lowest level possible that allows you to comfortably
view the screen. This is an effective way of
conserving battery power.
Note:
When you install an operating system, you must
install the ThinkPad Features program using the Utility Diskette.
To install the ThinkPad Features program:
"Installing Software".
Your computer has the following built-in battery power-saving functions to save power when you use the battery pack or the AC Adapter:
It takes more time to return to normal operation from suspend mode than to return from standby mode, but the computer does not use as much power.
The following figure shows the operations required when the computer
moves from a power-off condition to operation mode, and vice versa.
In standby mode, the LCD turns off. The computer immediately resumes normal operation when you press any key or use any pointing device. 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.
The following indicators
change status when you use suspend mode:
| Current Status | Indicator Lamps | |
 Suspend Mode |  Power-On | |
| In suspend mode | Green | Off |
| Entering suspend mode or resuming from suspend mode | Blinking green | Off |
| Normal operation | Off | Green |
The computer provides the following two types of suspend modes for you to save power:
To create hibernation file:
Create a hibernation file before using this mode.
In RediSafe suspend mode,
all tasks are stopped, and the memory data and the
status of the computer are stored on the hard disk drive.
This prevents accidental loss of the data
during suspend mode. Resuming normal operation is faster from
RediSafe suspend mode
than it is from Hibernation mode;
the computer resumes normal operation when you press
the Fn key in RediSafe suspend mode.
If all battery power is used and the computer turns off during RediSafe suspend mode, install a fully charged battery pack or connect the AC Adapter; then press the power switch to resume operation. All tasks are restored.
To enable RediSafe suspend mode, do the following:
| |
If you are using OS/2 or Windows:
)
then click on
Suspend/Hibernation/Resume options
(
).
If you are using DOS:
Consider the following before using suspend mode:
| Important |
|---|
|
When you use Windows Version 3.11, ensure that Advanced Power Management (APM) is installed according to the instructions in "Installing Microsoft Windows Version 3.11". |
reference #58.
When other PC Cards are used and the computer enters suspend mode, all application programs stop. Communication also stops for communication PC Cards not in the preceding list. For some PC Cards, power to the PC Cards might also turn off.
If communication for a PC Card is not reestablished after normal operation is resumed, remove and then reinstall the PC Card before restarting the system or an application program. For other kinds of PC Cards, if the PC Card or computer does not operate, restart the application or the computer.
Note:
For DOS or Windows 3.11, you must ensure the Ring indicator
option is set in the
program so the computer automatically resumes normal operation.
(The default is for the option to be set.)
While a communication link is active, the computer does not enter suspend mode.
Notes:
In hibernation mode, all tasks are stopped and the memory data and the current status of the computer are stored on the hard disk drive; then power is turned off. No battery power is used. When power is turned on again, the computer automatically restores the tasks and resumes normal operation.
To enter hibernation mode, press Fn+ F12. When the computer enters hibernation mode, you hear one short beep. A graphical message appears and suspend mode indicator lamp blinks; then a short beep sounds again to inform you that the computer has entered hibernation mode.
To return to normal operation, press the power switch.
Before you can use hibernation mode, you must first create a hibernation file. See the next section.
The size of the hibernation file will be approximately 1MB greater than total memory. For example, if you have installed an optional 16MB memory module (DIMM) and since the base memory is 16MB, the hibernation file is 33MB:
(16MB + 16MB) + 1MB = 33MB
The following describes how to create a hibernation file
for your operating system:
| |
).
).
The computer can now enter hibernation mode.
If you are using DOS:
Type PS2 HFILE C at the command prompt; then press Enter.
The hibernation file is created on drive C.
Note:
The file system supported by the computer one of the following:
Consider the following before using hibernation mode:
Note:
If the communication links are still
not reestablished, remove and then reinstall
the PC Card before restarting the system or application program.
This prevents possible problems from occurring with communication application programs after the computer returns to normal operation.