Dell Inspiron 1521 (Mid 2007) - Manual (Page 52)

52
Using a Battery
The battery is too hot to start charging if the battery light flashes
alternately blue and amber. 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 more information about resolving problems with a battery, see "Power
Problems" on page 125.
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 batteries
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 the 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.
NOTICE:
If you choose to replace the battery with the computer in Sleep state, you
have up to 1 minute to complete the battery replacement before the computer shuts
down and loses any unsaved data.
To remove the battery:
1 If the computer is connected to a docking device (docked), undock it. See
the documentation that came with your docking device for instructions.
2 Ensure that the computer is turned off.
3 Turn the computer over.
4 Slide and click the battery release latches to keep them open.
5 Slide the battery out of the bay.