BenQ Joybook P53 Series User Manual page 63

When charging the battery, the power indicator on Joybook
suggests that the battery is fully charged. When I check it from
the Power Manager in Windows, the battery level is only about
95%-99%. Why?
It is the result of the battery protection design of Joybook. When
the power indicator on Joybook is off, it means that the battery
has reached a saturated voltage: 95%-99%. At this moment, the
voltage difference detected by Joybook is very small, so it will
reduce the charging current to prevent overcharging the battery
with excess current or voltage, which will damage the battery.
Moreover, in order to protect the battery from exposing to high
voltage and current for a long time during charging, the battery
has been equipped with a protection circuit that will charge the
battery at low current in the final phase.
How come my notebook is not fully charged even after a full
night charge?
Make sure that the Joybook is receiving power. Is the cord
plugged in correctly? When the battery is installed in the
computer and it is properly plugged in to an AC outlet, check to
see if the battery level icon is showing a charge sign. If this does
not fix the problem, the battery, the power source in the
notebook, or the AC power cord may be defective. Consult your
BenQ dealer for help and maintenance.
What should I do if the battery gets hot in my Joybook?
Take the battery out and let it cool down. If the problem persists
once it is inserted back into the Joybook, the battery could be
defective and it may need to be replaced.
Joybook will not start up, even though the Power button was
pressed.
Check the power indicator.
• If the power button is not lit up, Joybook is not being supplied
by power, either from an external power source via the AC
adapter or from the battery. Make sure that the AC adapter is
correctly inserted into the power socket of Joybook and a
working electrical socket, and allow the battery to begin
charging.
• If the power indicator is lit up in white, the Joybook is
being supplied normally with power, meaning that the
problem lies elsewhere.
• If you have added any hardware, such as a memory
module, check if it has been installed correctly.
• It is possible that certain operating system files are
damaged or missing. If so, you may need to first back
up all your data and then use the Drivers and
Applications disc that came with the Joybook to return
the its software to original state. Please note however
that doing so will cause all of your personal data on the
hard disk to be lost!
Why does the battery on my Joybook seem to last shorter and
shorter?
It is normal for Lithium-Ion (Li-Ion) batteries to decline in
capacity over time.
FAQ and troubleshooting 59