Dell D620/D820 - LATITUDE PRECISION M65 User Manual

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Dell D620/D820 - LATITUDE PRECISION M65 User Manual Manual pdf 12 page image

Microsoft® Windows® Power MeterThe Windows Power Meter indicates the remaining battery charge. To check the Power Meter, double-click the icon on the taskbar.If the computer is connected to an electrical outlet, a icon appears.Charge GaugeBefore you insert a battery, press the status button on the battery charge gauge to illuminate the charge-level lights. Each light represents approximately 20percent of the total battery charge. For example, if the battery has 80 percent of its charge remaining, four of the lights are on. If no lights appear, the batteryhas no charge.Health GaugeThe battery operating time is largely determined by the number of times it is charged. After hundreds of charge and discharge cycles, batteries lose somecharge capacity, or battery health. To check the battery health, press and hold the status button on the battery charge gauge for at least 3 seconds. If nolights appear, the battery is in good condition, and more than 80 percent of its original charge capacity remains. Each light represents incrementaldegradation. If five lights appear, less than 60 percent of the charge capacity remains, and you should consider replacing the battery. See Specifications formore information about the battery operating time.A low-battery warning occurs when the battery charge is approximately 90 percent depleted. The computer beeps once, indicating that minimal batteryoperating time remains. During that time, the speaker beeps periodically. If two batteries are installed, the low-battery warning means that the combinedcharge of both batteries is approximately 90 percent depleted. The computer enters hibernate mode when the battery charge is at a critically low level. Formore information about low-battery alarms, see Configuring Power Management Settings.Conserving Battery PowerPerform the following actions to conserve battery power:l Connect the computer to an electrical outlet when possible because battery life is largely determined by the number of times the battery is used andrecharged.l Place the computer in standby mode or hibernate mode (see Power Management Modes) when you leave the computer unattended for long periods oftime.l Use the Power Management Wizard (see Configuring Power Management Settings) to select options to optimize your computer's power usage. Theseoptions can also be set to change when you press the power button, close the display, or press .Power Management ModesStandby ModeStandby mode conserves power by turning off the display and the hard drive after a predetermined period of inactivity (a time-out). When the computer exitsstandby mode, it returns to the same operating state it was in before entering standby mode.1 battery 2 battery charge gaugeNOTICE: To avoid losing or corrupting data, save your work immediately after a low-battery warning. Then connect the computer to an electrical outlet,or install a second battery in the media bay. If the battery runs completely out of power, hibernate mode begins automatically.NOTE: See Battery Performance for more information on conserving battery power.NOTICE: If your computer loses AC and battery power while in standby mode, it may lose data.