If Dell QuickSet is installed, press to display the QuickSet Battery Meter.The Battery Meter window displays status, charge level, and charge completion time for the battery in your computer.In addition, when your computer is connected to a docking device (docked), the Battery Meter window includes a Dock Battery tab, which displays the chargelevel and current status of the docking device battery.The following icons appear in the Battery Meter window:For more information about QuickSet, right-click the icon in the taskbar, and click Help.Microsoft Windows Power MeterThe Windows Power Meter indicates the remaining battery charge. To check the Power Meter, double-click the icon on the taskbar. For more informationabout the Power Meter tab, see "Power Management."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 noThe computer or docking device is running on battery power.The computer is connected to AC power and the battery is charging.The computer is connected to AC power and the battery is fully charged.