54 Using a Batterythe charge capacity remains, and you should consider replacing the battery(see "Battery" on page 201 for more information about the battery operatingtime).Low-Battery WarningNOTICE: To avoid losing or corrupting data, save your work immediately after alow-battery warning, then connect the computer to an electrical outlet. If thebattery runs completely out of power, Sleep state begins automatically.A pop-up window warns you when the battery charge is approximately90 percent depleted. The computer enters Sleep state when the batterycharge is at a critically low level.You can change the settings for the battery alarms in Dell QuickSet or thePower Options window (see "Configuring Power Management Settings" onpage 54).Conserving Battery PowerTo conserve battery power on your portable computer, do any of thefollowing:• Connect the computer to an electrical outlet when possible; battery life islargely determined by the number of times the battery is used andrecharged.• Configure the power management settings using either Dell QuickSet orMicrosoft Windows Power Options to optimize your computer’s powerusage (see "Configuring Power Management Settings" on page 54).• Use the Sleep power state when you leave the computer unattended forlong periods of time (see "Using the Sleep Power State" on page 55).Configuring Power Management SettingsYou can use Dell QuickSet or Windows Power Options to configure the powermanagement settings on your computer.• For information on how to use the Dell QuickSet Power Managementwizard, right-click the QuickSet icon in the notification area, click Help,and then select Power Management.
