Battery PackChapter 2 Operating on Battery Power 37Battery-low WarningYou never have to worry about battery power as long as youare using the AC adapter. However, when you operate thecomputer on battery power, pay extra attention to thewarning beeps and the power indicator on the displaypanel.The following signals indicate a battery-low condition:q The buzzer generates four short beeps every minute, ifyou enabled the Battery-low Warning Beep parameter inSetup.q The power indicator flashes at regular intervals untilbattery power is depleted.When you receive a battery-low warning, you have aroundtwo minutes to save your work. If you do not connect theAC adapter within this period, the computer entersHibernation mode if the Battery Low Suspend parameter inSetup is enabled and the following conditions exist:q The Hibernation file created by PhDISK is present andvalid. See “PhDISK” on page 73.q There is enough battery power left to save systeminformation onto the hard disk.Otherwise, the computer enters Standby mode.Warning: Connect the AC adapter to the computer assoon as possible. Data is lost when computer poweris cut off during Standby mode.