Using External Ac Power - HP Presario A900 - Notebook PC User Manual

3

Using external AC power

External AC power is supplied through one of the following devices:
WARNING!
a replacement AC adapter provided by HP, or a compatible AC adapter purchased from HP.
●
AC adapter included with the computer
●
Optional docking device or expansion product
●
Optional power adapter
Connect the computer to external AC power under any of the following conditions:
WARNING!
●
When you are charging or calibrating a battery
● When you are installing or modifying system software
●
When you are writing information to a CD or DVD
When you connect the computer to external AC power, the following events occur:
● The battery begins to charge.
● If the computer is turned on, the battery meter icon in the notification area changes appearance.
When you disconnect external AC power, the following events occur:
● The computer switches to battery power.
● The display brightness is automatically decreased to save battery life. To increase display
brightness, press the
To reduce potential safety issues, use only the AC adapter provided with the computer,
Do not charge the computer battery while you are onboard aircraft.
fn+f8 hotkey or reconnect the AC adapter.
19