Dell Precision M20 Dell€Precision€Mobile€Worksta - Page 13

The following icons appear in the Battery Meter window: The 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. For more information about QuickSet, right-click the icon in the taskbar, and click Help. Microsoft® Windows® Power Meter The Windows Power Meter indicates the remaining battery charge. To check the Power Meter, double-click the about the Power Meter tab, see "Power Management." icon on the taskbar. For more information If the computer is connected to an electrical outlet, a icon appears. Charge Gauge Before you insert a battery, press the status button on the battery charge gauge to illuminate the charge-level lights. Each light represents approximately 20 percent 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 battery has no charge. Health Gauge The battery operating time is largely determined by the number of times it is charged. After hundreds of charge and discharge cycles, batteries lose some charge 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 no lights appear, the battery is in good condition, and more than 80 percent of its original charge capacity remains. Each light represents incremental degradation. If five lights appear, less than 60 percent of the charge capacity remains, and you should consider replacing the battery. See "Specifications" 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, or install a second battery in the module bay. If the battery runs completely out of power, hibernate mode begins automatically. A pop-up window warns you when the battery charge is approximately 90 percent depleted. For more information about low-battery alarms, see "Power Management." A low-battery warning occurs when the battery charge is approximately 90 percent depleted. The computer beeps once, indicating that minimal battery operating time remains. During that time, the speaker beeps periodically. If two batteries are installed, the low-battery warning means that the combined charge of both batteries is approximately 90 percent depleted. The computer enters hibernate mode when the battery charge is at a critically low level. For more information about low-battery alarms, see "Power Management." Charging the Battery