Dell Precision M2300 (Late 2007) - Manual (Page 15)

battery charge and temperature. If necessary, the AC adapter then charges the battery and maintains the battery charge.
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 .
Replacing the Battery
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. Slide the two latch releases on the bottom of the computer, and then remove the battery from the bay.
To replace the battery, follow the removal procedure in reverse order.
Storing a Battery
Remove the battery when you store your computer for an extended period of time. A battery discharges during prolonged storage. After a long storage period,
recharge the battery fully (see
Charging the Battery ) before you use it.
Battery Errors
To address error codes generated by the battery, refer to Error Messages .
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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.
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.