Using the Battery and Power Related Functions
10
Using the Battery and Power Related Functions
Charging the Battery
• Charging will not start if the battery's temperature is below 0
q
C (32
q
F) or above
45
q
C (113
q
F).
• The charging process will stop and the Power Indicator flashes amber when the
battery's temperature gets above 60
q
C (140
q
F). If this happens, the battery pack
may be damaged. Please contact your dealer.
• During charging, do not disconnect the AC adapter before the battery has been
fully charged; otherwise you will get a prematurely charged battery.
To charge the battery pack, connect the AC adapter to the computer and an elec-
trical outlet. The Battery Indicator
on Joybook lights up in amber to indicate
that charging is in progress. You are advised to keep Joybook power off while the
battery is being charged. When the battery is fully charged, the Power Indicator
lights up in green.
It takes approximately 3.2 hours to fully charge the Li-Ion battery pack when Joy-
book is off, and 4.5 hours to fully charge the Li-Ion battery pack when Joybook is
on.
After the Joybook has been fully recharged, do not immediately disconnect and
reconnect the AC adapter to charge it again. Doing so may damage the battery.
The battery level may automatically decrease due to the self-discharge process
(0.21 % per day), even when the battery pack is fully charged (100 %). This happens
no matter if the battery pack is installed in the Joybook.
Initializing the Battery
You need to initialize a new battery pack before using it for the first time or when
the actual operating time of a battery pack is much less than expected.
Initializing is the process of fully charging, discharging, and then charging. It can
take several hours.
1. Make sure that the Joybook power is turned off. Connect the AC adapter to fully
charge the battery pack.
2. After the battery pack is fully charged, turn on the Joybook. When the BenQ
logo appears on the screen, press F2 to invoke the program.
3. Disconnect the AC adapter and leave the Joybook on until the battery is fully
discharged. The Joybook will shut down automatically.
4. Connect the AC adapter to fully charge the battery pack.
Checking the Battery Level
Any battery level indication is an estimated result. The actual operating time can be
different from the estimated time, depending on how you are using the Joybook.
You can check the approximate battery level using the battery meter function of
Windows. To read the battery level in Windows, click the
icon on Windows
Taskbar. (Click the
icon if the computer is using AC power.)
Battery Low Signals and Actions
The Battery Low signal goes off when the battery has approximately 10% (Win-
dows default setting) of its charge remaining. Joybook gives warning beeps or
messages and the Battery Indicator
flashes red to alert you to take actions.
You can set up your threshold and Battery Low signals under Windows.
Immediately save your data upon Battery Low. The remaining operating time
depends on how you are using the Joybook.
Always respond to Battery Low by placing your Joybook on Standby or Hiberna-
tion mode, turning off the computer, or connecting the AC adapter. If you do not
take any action, the computer will automatically hibernate and turn off.
• If you are using a flash PC memory card, do not access the card during battery low
periods. This is because the access may take longer than the time it takes the bat-
tery to run out of charge, thus making your access to the card unsuccessful.
• If you fail to save your data when the battery completely runs out of charge, then
you lose your data.
Replacing the Battery
• There is danger of explosion if the battery is incorrectly replaced. Replace the bat-
tery only with the computer manufacturer's optional battery packs. Discard used
batteries according to the dealer's instructions.
• Do not attempt to disassemble the battery pack.
If you often rely on battery power for a long period of time while traveling, you
may consider the purchase of an additional battery pack from your dealer and
keep it with you in a fully charged state as a backup.
To replace the battery pack:
1. Make sure that the computer is not turned on or connected to AC power.
2. Carefully place the computer upside down.
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