Dell Latitude D420 Quick Reference Manual

Also see for D420 - Latitude Notebook Computer: Quick reference guide Setup guide User guide Service manual Quick reference guide

Contents

16 Quick Reference GuideLow-Battery WarningNOTICE: To avoid losing or corrupting data, save your work immediately after a low-battery warning. Thenconnect the computer to an electrical outlet. If the battery runs completely out of power, hibernate modebegins automatically.By default, a pop-up window warns you when the battery charge is approximately 90 percent depleted.You can change the settings for the battery alarms in QuickSet or the Power Options Properties window.See "Configuring Power Management Settings" in your User’s Guide for information about accessing QuickSetor the Power Options Properties window.Charging the BatteryNOTE: With Dell™ ExpressCharge™, when the computer is turned off, the AC adapter charges a completelydischarged battery to 80 percent in about 1 hour and to 100 percent in approximately 2 hours. Charge time is longerwith the computer turned on. You can leave the battery in the computer for as long as you like. The battery’s internalcircuitry prevents the battery from overcharging.When you connect the computer to an electrical outlet or install a battery while the computer is connectedto an electrical outlet, the computer checks the battery charge and temperature. If necessary, the AC adapterthen 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 maynot 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. Disconnectthe 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" in your User’s Guide.Replacing the BatteryCAUTION: Before performing these procedures, turn off the computer, disconnect the AC adapter from theelectrical outlet and the computer, disconnect the modem from the wall connector and computer, and removeany other external cables from the computer.CAUTION: Using an incompatible battery may increase the risk of fire or explosion. Replace the battery only witha compatible battery purchased from Dell. The battery is designed to work with your Dell™ computer. Do not usea battery from other computers with your computer.NOTICE: You must remove all external cables from the computer to avoid possible connector damage.To remove the battery:1 If the computer is connected to a docking device (docked), undock it. See the documentation thatcame with your docking device for instructions.2 Ensure that the computer is turned off.