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Using the Battery 37
Using the Battery
Your computer uses a rechargeable lithium-ion battery pack for
power when the AC adapter is not attached to an electrical
outlet.
Charging the Battery
Your computer’s battery starts charging automatically when
you connect the AC adapter to the computer. If the computer is
off, the battery charges faster than if the computer’s power is on.
Approximate charging times for your battery are
•
3 hours with the computer off
•
5 hours with the computer on
While the battery is charging, the battery charge light on the
computer is amber (see Figure 9 on page 21 for the location of the
battery charge light). When the battery is fully charged, the light
changes to green.
You can also use the optional external battery cradle to charge
the battery while it is not in the computer. (See “Battery Cradle”
on page 92 for more information.)
When you use a new battery pack for the first time or use a
battery after a long period of storage, the initial battery life is
shorter than normal. Normal battery life resumes after a few
discharge-recharge cycles.
Follow these rules for charging your battery:
•
A battery normally discharges power when not used for
long periods of time. Be sure to recharge the battery
every two months when it is not in use.
•
Make it a practice to discharge your battery fully before
recharging the battery. This can help extend the life of
the battery.
•
Do not attempt to charge the battery in temperatures of
under
41
o
F (5
o
C) or over 95
o
F (–35
o
C
.)
3754-1.bk : 3754-2.fm Page 37 Wednesday, July 30, 1997 2:33 PM