Battery FAQ
An explanation of proper usage of your notebook battery.

General FAQ
A list of Frequently asked questions (FAQ) applicable to all ChemBook™ notebook computers.

Miscellaneous FAQ
A list of FAQ pertaining to using supplemental peripherals or softwares on ChemBook™ notebook computers.

Battery FAQ
For more information, please go to General FAQ.

AC Adapter


  1. The AC adapter is designed for use with your notebook only. Connecting the AC adapter to another device can damage the adapter.
  2. The AC power cord supplied with your notebook is for use in the country where you purchased your notebook. If you plan to go overseas with the notebook, consult your dealer for the appropriate power cord.

The AC adapter serves as a converter from AC (alternating current) to DC (direct current) power because your notebook runs on DC power, but an electrical outlet usually provides AC power. It operates on any voltage in the range of 90-265V AC. The battery pack automatically recharges while your notebook is connected to AC power.

Determining the Amount of Battery Life Left
The battery is made up of chemical material and its capacity cannot be measured physically. The only way of knowing the battery charge is by estimation. However, the estimation may get less accurate under some situations (for example, after a long period of storage or after replacement of battery packs). If this happens, you should fully recharge the battery.

By Gas Gauge (available only for the notebooks equipped with Battery with Gas Gauge)
On the top or side of the battery pack is a gas gauge for displaying the battery charge. If the battery pack is not installed in the notebook and you want to know the battery charge, you can press the on/off switch with a pointed device to see the number of indicators that light green. The number of green indicators indicates the relative percentage of the battery charge.

By Operating System (available only for notebooks equipped with Smart Battery)
While the notebook is in use, you can know the battery charge with some operating systems, e.g., Windows. Windows can display a battery meter that shows the battery charge.

Important Notes on Using Battery Pack

Recharging and discharging
Recharging will not start if the battery's temperature is below 0ºC (32ºF) or above 45ºC (113ºC). Also, during recharging, the recharging will stop if the battery's temperature gets above 60ºC (140ºF). To avoid problems caused by temperatures, make sure the battery is not too hot before you begin to recharge or discharge the battery. Follow these general advises:

  • When the battery is fully discharged, allow a 30-minute interval before you connect the AC adapter to recharge the battery.
  • When the battery is being recharged, keep the notebook power off and wait until it is fully recharged.
  • When the battery is fully recharged, disconnect the AC adapter and allow a 30-minute interval before you begin to use the battery power.
  • During recharging, do not disconnect the AC adapter before the battery has been fully charged; otherwise you will get a prematurely charged battery.
  • After the notebook has been fully recharged, do not immediately disconnect and reconnect the AC adapter to charge it again. Doing so may damage the battery.
  • Do not leave the battery completely discharged for too long as this may affect the battery's performance.

Maintaining charge on NiMH battery
The operating time of a NiMH battery will get shorter than expected if the notebook has not been used for a long time (say, a few weeks). This is because NiMH batteries are susceptible to self-discharge: the battery will discharge itself even if not in use. Normally a fully-charged battery gets totally self-discharged in one to one and a half months. If this happens, solve the problem by charging and discharging the battery for a minimum of three times. This means after you fully charge the battery and then used up the battery power for three times, the battery should regain its operating time.

Operating and Handling

  • Never remove the battery pack while it is in use. If you need to replace the battery pack, make sure you have turned off the notebook power.
  • Leave the battery pack in place unless you will replace it. If you remove the battery pack, keep it away from conductors such as metals and water. In case the battery's pins get into touch with conductors, the battery may become unusable as a result of short-circuit.
  • When you disconnect the AC adapter, disconnect from the electrical outlet first and then from the notebook. To prevent data loss that may be caused by low battery, develop the habit of frequently saving your data to the hard disk or a diskette.

Maintenance of the Battery

  • When you install a new battery, fully charge and discharge the battery at least once and then fully charge the battery before you begin to use the battery power for the first time.
  • Protect your notebook from extremes in temperature. (See "Environmental specifications" in Appendix A for temperature range.)
  • Do not store fully-charged NiMH battery in a bulky, densely packed condition, otherwise the overheating of the battery pack and subsequently the melting of the plastic case can happen.

Battery Low Signals and Actions

Battery Low occurs when the battery has approximately 10% of its charge remaining. The notebook gives warning beeps to alert you to take actions. If your notebook model has LED indicators, the Battery indicator will blink orange.

Immediately save your date upon Battery Low. The remaining operating time depends on how you are using the notebook: if you are using the audio subsystem, PC card, hard or floppy disk drives, the battery might run out of charge very quickly.

Always respond to Battery low by connecting the AC adapter or turning off the notebook, or suspending your notebook to disk.

If you do not take any action, after two minutes' warning beeps, the notebook will automatically suspend to disk and turn off.


  1. If the "Battery Low warning beep" is set to [disable] in the SETUP program, the notebook will not beep.
  2. If the suspend-to-disk partition does not exist on your hard disk, the notebook will not be able to suspend to disk. It will keep on beeping until you take actions or until the battery runs out of charge.
  3. If you are using a flash PC card, do not access the card during low battery periods. This is because the access may take longer than the time it takes the battery to run out of charge, thus making your access unsuccessful.
  4. If you fail to save your data when the battery completely runs out of charge, then you lose your data.

Power-Saving Tips

Your notebook implements Power Management features that automatically conserve power for you. You can also take the following measures in conserving battery power:

  1. Lower the brightness of the LCD display. Select the lowest brightness that you feel comfortable with.
  2. Be conservative in setting the "hard disk power down after." Power drain from spooling up the drive can often outweigh the power savings from shutting it down. If an application does not frequently access the hard disk drive, you may shorten the time-out period. This causes the hard disk drive to enter standby mode after a shorted idle time and thus conserve power.
  3. Set up a disk cache, RAM disk, or both. The best type of disk cache is one that can cache disk reads as well as writes. A RAM disk, used like a hard disk drive, can reduce drive access and save battery power.

General FAQ


Memory Video Storage PCMCIA Input / Output Battery Power Management Operating Systems


What is the CPU Voltage in my ChemBook™ notebook?

The following chart lists the voltages for different types of CPUs supported by ChemBook™ notebooks. Please note that for each ChemBook™ model, not all CPU types are supported.

Intel® Pentium® processor 75 - 200 MHz 3.3V
Intel® Pentium® processor with MMX™ technology 166 - 233 MHz 2.8V
Intel® mobile Pentium® processor with MMX™ technology 166 - 233 MHz 1.8V
Intel® mobile Pentium® processor with MMX™ technology 266 MHz 2.0V
Intel® mobile Pentium® II processor 233-300 MHz 1.7V / 1.6V

If you are installing the CPU yourself, you will need to manually adjust dip switches which corresponds to the speed and voltage requirement of the CPU. For ChemBook™ 6800 and 6800XL, you will need to obtain the appropriate CPU Power board. For systems using the Intel® Mobile Module, there is no need for CPU voltage switches or jumpers. The voltage regulator is embeeded on the Mobile Module itself.

What is the optimal memory size?

Although ChemBook™ notebook computers are capable of supporting system memory sizes up to 128MB or 256MB, the optimal memory size, i.e., the memory size which provides maximum performance and efficiency, is determined by the core logic chipset, specifically, the maximum cacheable memory range of the core logic chipset. The Intel® 430TX Core Logic chipset for Intel® Pentium® processor with MMX™ technology systems supports a maximum of 64MB of cacheable memory size, which the Intel® 440BX Core Logic chipset for Intel® Pentium® II processors supports a maximum of 512MB of maximum cacheable memory size. This means that for 430TX systems, if your system memory size exceeds 64MB, you may experience an overall performance decrease.

How can I display full screen on my SVGA or XGA LCD?

If you have a SVGA screen, you might see a 1" border around the display (or 1.5" for XGA screens). This is due to the fact that the VGA mode is used by default in DOS and Windows. If you wish to use the VGA mode with the full screen, follow these steps. (only available for 2600, 5400, 6800, and 6800XL)

  1. Turn on the notebook.
  2. Enter System Configuration Utility Setup (BIOS Setup).
  3. Either check the option for Video Expansion Mode or uncheck the option for disabling Video Expansion Mode (depending on the model).
  4. Save the setting and reboot the computer.

DOS does not use the SVGA mode. However, the DOS VGA utility diskette (included with the notebook) does have drivers that allow SVGA display with some programs, such as Autocad.

To enable the SVGA mode in Windows 95, follow these steps.

  1. From Windows, go to Control Panel / Display Properties / Settings.
  2. Go into Advanced Properties (Win95B) or Display Settings (Win95/95a), and change the monitor type to Laptop Display 800x600 (or Laptop Display 1024x768 for XGA).
  3. Move the slider bar for Desktop Area to the right to 800 by 600 pixels (or 1024 by 768 for XGA screens).
  4. Click on OK. Windows will resize the desktop. Be sure to confirm the new desktop size within 5 seconds, or else Windows will return to the original desktop size.

How should I partition a large capacity hard drive during Windows NT installation?

Because of limitations in the files systems, you cannot partition hard disk drives larger than 4GB with one single partition. Here are some example partition schemes for specific hard disk drive models. (All partition sizes are approximate, and may not add up to the total drive capacity.)

  • IBM DYLA-28100 8.1GB HDD : 4GB + 4GB
  • IBM DADA-25400 5.4GB HDD : 3GB + 2.5GB
  • Toshiba MK6409MAV 6.4GB HDD : 3.2GB + 3.2GB
  • IBM DTCA-24090 4.09GB HDD : Single Partition of 4GB
  • Toshiba MK4006MAV 4.1GB HDD: Single Partition of 4GB

You should also format the partitions with NTFS file system, since the maximum partition size for FAT is 2GB.

Are the modular devices hot-swappable?

Unless otherwise specified, none of the modular devices on ChemBook™ notebook computers are swappable. You must turn off the computer before you can remove or insert these devices. The only exceptions to this rule are PCMCIA cards, batteries, and AC adapters.

How can I get the fax modem to work with DOS programs on ChemBook™ notebooks?

By default, the fax modem, as installed on ChemBook™, is configured to be on COM 3, IRQ 10 or 11. There are some older DOS programs which do not support interrupt requests over 7. To use the fax modem for these DOS programs, the best way is to disable the Infrared Port built-in in each ChemBook™, which is on COM 2, IRQ 3. After disabling the Infrared Port, the new setting for the Modem will be on COM 2, IRQ 3.

For instructions on how to disable the built-in Infrared Port in the CMOS BIOS setup, please read the user's manual, since the settings varies between different notebook models.

By disabling the IrDA port, the overall performance of the computer is not affected. The only disadvantage would be that you can no longer use the Infrared wireless communication feature of the computer.

What are the limitations of the TV Out Port?

On all systems or docking stations where TV-Out capabilities are supported, the following two limitations apply due to the limited bandwidth of the television :

  • For systems with RCA jacks, the maximum resolution is 640 x 480 for NTSC, and 800 x 600 for PAL.
  • For systems with S-Video jacks, including ChemBook™ 6000 and 7000, the maximum resolution is 800 x 600 for both NTSC and PAL.
  • Simultaneous display on TV and LCD is not supported.

Does my notebook computer have a smart battery?

Certain ChemBook™ notebooks are shipped with smart batteries, which allows you to see the remaining battery life in Windows, as well as a gas gauge on the battery itself. A common misconception is that Lithium Ion batteries are smart batteries. In reality, there is no relation between whether a battery is smart or not and whether a battery is Lithium Ion or Nickel Metal Hydride.

Why doesn't my system enter sleep/suspend mode in Windows 95?

When APM is enabled in Windows 95, the operating system will periodically poll the status of the CD-ROM drive, the drive controller reports that the drive is still in use, preventing the computer from being suspended. Please perform the following procedures to correct this problem:

  1. Click Start/Settings/Control Panel/System/Device Manager.
  2. Double click CD-ROM/TEAC-xxE (or Masushita, Mitsumi, or Toshiba)/Settings. Click on "Auto Insert Notification" check box to disable it. Click OK.
  3. Restart Windows for the changes to take effect.

How do I determine the size of the suspend-to-disk partition?

The minimum size of the suspend-to-disk partition must be greater than the sum of the system and video memory. For example, if your system is equipped with 64MB, and your system has 4MB Video RAM, then your suspend partition should be a minimum of 68MB. You should also follow these two recommendations:

  • Allocate a minimum of 4 MB extra in addition to the system+video memory size.
  • If you plan on increasing the memory size of your system in the future, allocate for the maxmimum amount of memory supported by the system.
  • For systems supporting maximum of 128MB: Recommended S2D Partition size = 136MB.
  • For ChemBook™ 9780M supporting maximum of 192MB: Maximum Recommended S2D Partition size = 200MB.
  • For ChemBook™ 6000 supporting maximum of 144MB: Maximum Recommended S2D Partition size = 150MB.
  • For ChemBook™ 3300 supporting maximum of 96MB: Maximum Recommended S2D Partition size = 100MB.
  • For ChemBook™ 9750 supporting maximum of 80MB: Maximum Recommended S2D Partition size = 84MB.

Why do I get Suspend-to-Disk partition error messages when I increase the system memory size?

The error messages occur to indicate that your suspend-to-disk partition is too small to support the new, larger system memory size. To remove the error message and to re-activate the suspend-to-disk function, you will need to remove all partitions on the hard disk, recreate the suspend-to-disk partition using the new memory size, and re-install your operating system and all applications. Please take the necessary precautions of backing up all your important data before you remove the partitions.

Does my ChemBook™ support Windows 98?

As a general rule, if your notebook system was purchased more than 6 months before Windows 98 was released, you should not install Windows 98 on that system. Our currently available models do support Windows 98. If you have an older model and wish to install Windows 98, please contact CHEM USA Technical support via E-mail at or phone at (510) 608-8818 BEFORE you proceed.

Which version of Windows 95 do I have?

Since Windows 95 was introduced in August 1995, there has been several versions of Windows 95 released.

  • Windows 95, version 4.00.950, which is the original version.
  • Windows 95 A (Service Release 1), version 4.00.950a, which is upgraded from the original version with Service Pack 1, and fixes several bugs in Windows 95.
  • Windows 95 B (OEM Service Release 2), version 4.00.950B, which is a major revision from Windows 95 A. This version included several improvements over the other versions, including Internet Explorer 3.0, support for FAT32, etc.
  • Windows 95 B (OEM Service Release 2.1), version 4.00.950B. This version is identical to OSR2, except that USB support has been added.
  • Windows 95 C (OEM Service Release 2.5), version 4.00.950C. This version includes OSR 2.1, with Internet Explorer 4.0 added.

The Setup Boot Disk for Windows 95 and Windows 95 A are interchangeable. However, the Setup Boot Disk for Windows 95 B and C is different from the Setup Boot Disk for either Windows 95 or 95A.

To distinguish between Windows 95 B CD-ROM and other versions, the Windows 95 B CD-ROM contains the mark "Includes CD Sampler! with Free Games". To distinguish between Windows 95 C CD-ROM and other versions, the Windows 95 C CD-ROM contains the hologram "Genuine Microsoft" in the center of the CD, as well as the "Includes CD Sampler! with Free Games" logo.

Please go to Microsoft Home Page for more information.

What is the PCMCIA Card Services listed in Windows 95B's Device Manager?

If you have Windows 95B OSR2, you may see a device called PCMCIA Card Services listed under Other Devices. Do not remove this device. It is necessary for the power management functions of PCMCIA cards.

Which Windows versions support Cardbus?

Among all of the currently released versions of Microsoft Windows, only Microsoft Windows 95B/C (OSR2.x) supports Cardbus. Windows NT 4.0 provides limited support for Cardbus devices if Service Pack 1 or later is installed. Future releases of Windows, including Windows 98 and Windows NT 5.0 are expected to provide full support for Cardbus.

Miscellaneous FAQ

IC Card Ethernet PCMCIA Card Ambicom Cardbus Fast Ethernet Card Registration Card


How do I set up IC Card Network Cards in Windows 95 or Windows 95 a?

To set up IC Card in Windows 95 original version or Windows 95 (a) version, follow these steps.

  1. Start Windows 95.
  2. Make sure that the PCMCIA socket is installed correctly in Device Manager.
  3. Insert the IC Card into one of the PCMCIA slots.
  4. Windows 95 will tell you that it has found new hardware, and give four choices. Choose the last choice, which is "Select from an alternate list of drivers."
  5. For the type of device, choose Network Adapter.
  6. For the manufacturer, choose D-Link Corporation. For the model number, choose D-Link DE650 Ethernet Card PCMCIA.
  7. Windows will ask you to insert the Windows 95 CD-ROM. After the files are copied, you will hear two tones.
  8. The IC Card is installed.

How do I set up IC Card Network Cards in Windows 95 B?

Note : This method only works for the Twisted Pair 10BaseT connection. If you are using 10Base2 coaxial connections, please go here for instructions.
  1. Insert the IC Card into the socket.
  2. The Update Device Driver Wizard will appear. Click on Next to let it look for an updated driver. It will eventually determine that it cannot find the driver. Click finish to return to Windows 95 Desktop.
  3. From the Start button, go to Settings/Control Panel/System/Device Manager.
  4. Click on the + sign next to Other devices. You will see a yellow exclamation mark next to "ICARD-ICARD".
  5. Click on "ICARD-ICARD" and click on properties/Driver/Update Driver.
  6. Choose No to select from a list of device drivers.
  7. For the device type, choose Network Adapters.
  8. Choose D-Link Corporation as the manufacturer, and DE-650 PCMCIA Card as the model number.
  9. Windows will start copying some files from the Windows 95B CD-ROM. It may also ask you input your computer name and Workgroup name.
  10. After Windows finishes copying files, restart the computer, and the network card should function properly.

Can I use IC Card Network Card with a Coaxial 10Base2 Network?

If you are having trouble connecting to your network IC Card with a coaxial 10Base2 connection, insert the driver diskette for the IC Card into drive A, and type from the a:\ prompt:

dmcu /bnc

Click here to go to the file list for the driver. The file (icarddrv.exe) contains a complete set of drivers for all operating systems. Use the -d parameter to extract all subdirectories, and look for the correct directory for your operating system.

Is there a device driver available for using IC Card Network Card in Windows NT 4.0?

A new IC Card driver for Windows NT 4.0 has been released. This version allows the card to be identified as a valid device in Control Panel / PCMCIA Devices, but does not allow Coaxial 10Base2 connections. Recommended settings are IRQ 5, I/O Address 300, Memory Address D0000.

Why do I get the error message "Not Enought Server Storage" on ChemBook™ 3300 in Windows NT after installing the Ambicom Cardbus Fast Ethernet Card?

If you see the "Not Enought Server Storage" error message, please re-apply Windows NT 4.0 Service Pack 3.

What do I write as the PGM-ID on the ChemBook™ Registration Card?

You do not have to fill-in the PGM-ID field on the ChemBook™ Registration Card.


FAQs (Frequently Asked Questions) | BIOS Updates and Downloads | Driver Downloads | RMA Policy  RMA (Return Material Authorization) Form

This site is best viewed with Internet Explorer 5.0 or better at 1024X768 resolution.
Copyright © 2005 ChemUSA Corp. All Rights Reserved.   . Legal Information