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Using a Battery 45
Charging the Battery
When you connect the computer to an electrical outlet or install a battery
while the computer is connected to an electrical outlet, the computer checks
the battery charge and temperature. If necessary, the AC adapter then charges
the battery and maintains the battery charge.
NOTE: With Dell™ ExpressCharge™, when the computer is turned off, the AC
adapter charges a completely discharged battery to 80 percent in about 1 hour and
to 100 percent in approximately 2 hours. Charge time is longer with the computer
turned on. You can leave the battery in the computer for as long as you like. The
battery’s internal circuitry prevents the battery from overcharging.
If the battery is hot from being used in your computer or being in a hot
environment, the battery may not charge when you connect the computer to
an electrical outlet.
The battery is too hot to start charging if the light flashes alternately
green and orange. Disconnect the computer from the electrical outlet and
allow the computer and the battery to cool to room temperature. Then
connect the computer to an electrical outlet to continue charging the battery.
For information about resolving problems with a battery, see "Power
Problems" on page 116.
Replacing the Battery
CAUTION: Using an incompatible battery may increase the risk of fire or
explosion. Replace the battery only with a compatible battery purchased from
Dell. The battery is designed to work with your Dell™ computer. Do not use a
battery from other computers with your computer.
CAUTION: Before performing these procedures, turn off the computer, disconnect
the AC adapter from the electrical outlet and the computer, disconnect the modem
from the wall connector and computer, and remove any other external cables from
the computer.
NOTICE: You must remove all external cables from the computer to avoid possible
connector damage.
For information about replacing the second battery, which is located in the
media bay, see the Service Manual for your system on support.dell.com.
To remove the battery: