Fujitsu 690Tx User Manual page 41

Recharging the Batteries
If you want to check the condition of either the
internal Lithium ion Smart battery or the exter-
nal Lithium ion Smart battery, check the Battery
Level indicators located on the Status Indicator
panel. These indicators change as the battery
levels change. Battery 1 is the internal Lithium
ion Smart battery and Battery 2 is the external
Lithium ion Smart battery. (Figure 2-3 on page
23.) You can also check the PowerPanel toolbar.
(See pages 43-47.)
The Lithium ion batteries are recharged inter-
nally using the AC adapter or auto/airline
adapter. To recharge the batteries:
Make sure the battery to be charged is
installed, then connect the AC adapter or
auto/airline adapter.
Make sure that the Battery Charging indicator
to the left of the Battery Level indicator
of the battery to be charged is visible on the
Status Indicator panel.
The percentage charge is shown inside the
Battery Level icon. (Figure 2-4 on page 25.)
U s i n g Y o u r L i f e B o o k 6 0 0 S e r i e s
When two Lithium ion batteries are installed,
the charge/discharge rate of the internal and
external Lithium ion batteries are the same,
when they are connected in parallel and are
both charging and/or discharging at the same
time. Since the rates are the same, one may
finish charging or discharging before the
other if they were not at the same charge le vel
when they were installed and/or the AC or
auto/airline adapter was connected. You can
choose to have the batteries charged in series
instead of in parallel, which will change the
relative charging rates for the two batteries.
There is no memory effect on the Lithium ion
batteries, which means that you do not ne ed to
discharge them completely before recharging. A
single fully discharged Lithium ion Smart bat -
tery will charge in approximately three (3)
hours when your notebook is Off or in Suspend
mode. The charging time from fully discharged
for two Lithium ion batteries together, is
approximately 5 hours when your notebook is
Off or in Suspend mode.Of course partially
charged batteries will not take as long to charge.
L i f e B o o k 6 0 0 S e r i e s f r o m F u j i t s u
The charge times will be significantly longer if
your notebook is in use while the batteries are
charging (from approximately nine (9) hours
for one battery to approximately 15 hours for
two batteries with normal operating levels).
C A U T I O N
Using heavy current devices such as LAN
cards or frequent CD-ROM accesses may
prevent charging completely.
Low Battery State
When the battery is running low, your note-
book beeps about every 15 seconds and the
Battery Level indicator(s) flash. If you do not
respond to the low battery alarm,the batteries
will continue to discharge until they are too low
to operate. When this happens there will be a
multiple beep alarm,the Battery Level indicator
will show dead battery, and your notebook will
go into Suspend mode to try and protect your
data as long as possible. Your power manage-
ment settings do not affect whether the dead
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