Disposing Of A Used Battery; Replacing The Battery; Using External Ac Power; Testing An Ac Adapter - HP ProBook 4445s User Manual

Disposing of a used battery

WARNING!
external contacts; do not dispose of in fire or water.
Refer to the Regulatory, Safety, and Environmental Notices for battery disposal information.

Replacing the battery

Computer battery life varies, depending on power management settings, programs running on the
computer, display brightness, external devices connected to the computer, and other factors.
You can find details about the battery by clicking the Battery icon in the notification area, at the far
right of the taskbar, and then click Laptop Battery.
NOTE: To ensure that you always have battery power when you need it, HP recommends
purchasing a new battery when the storage capacity indicator turns green-yellow.

Using external AC power

NOTE: For information on connecting to AC power, refer to the Setup Instructions poster provided
in the computer box.
External AC power is supplied through an approved AC adapter or an optional docking or expansion
device.
WARNING!
a replacement AC adapter provided by HP, or a compatible AC adapter purchased from HP.
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 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 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.

Testing an AC adapter

Test the AC adapter if the computer exhibits any of the following symptoms when it is connected to
AC power:
●
The computer does not turn on.
●
The display does not turn on.
●
The power lights are off.
42 Chapter 6 Power management
To reduce the risk of fire or burns, do not disassemble, crush, or puncture; do not short
To reduce potential safety issues, use only the AC adapter provided with the computer,
Do not charge the battery while you are onboard aircraft.