Dell PP22L owner manual Conserving Battery Power, Low-Battery Warning

the charge capacity remains, and you should consider replacing the battery (see "Battery" on page 210 for more information about the battery operating time).

Low-Battery Warning

NOTICE: To avoid losing or corrupting data, save your work immediately after a low-battery warning, then connect the computer to an electrical outlet. If the battery runs completely out of power, Sleep state begins automatically.

A pop-up window warns you when the battery charge is approximately

90 percent depleted. The computer enters Standby or Sleep mode when the battery charge is at a critically low level.

You can change the settings for the battery alarms in Dell QuickSet or the Power Options window (see "Power Management Modes" on page 63).

Conserving Battery Power

To conserve battery power on your portable computer, do any of the following:

•Connect the computer to an electrical outlet when possible; battery life is largely determined by the number of times the battery is used and recharged.

•Place the computer in standby mode or hibernate mode when you leave the computer unattended for long periods of time. See "Power Management Modes" on page 63.

•Configure the power management settings using either Dell QuickSet or Microsoft Windows Power Options to optimize your computer’s power usage (see "Power Management Modes" on page 63).

•Use the Power Management Wizard or the Power Options Properties Sleep power state when you leave the computer unattended for long periods of time (see "Standby and Sleep Mode" on page 63).

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Using a Battery