Disposing of a battery
When a battery has reached the end of its useful life, do not dispose of the battery in general household
waste. Follow the local laws and regulations in your area for battery disposal.
Replacing a battery
The battery(ies) in this product cannot be easily replaced by users themselves. Removing or replacing the
battery could affect your warranty coverage. If a battery is no longer holding a charge, contact support.
Using external AC power
WARNING!
To reduce potential safety issues, use only the AC adapter provided with the computer, a
replacement AC adapter provided by HP, or a compatible AC adapter purchased from HP.
NOTE:
For information on connecting to AC power, see 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.
Connect the computer to external AC power under any of the following conditions:
●
When charging or calibrating a battery
●
When installing or modifying system software
●
When writing information to a CD, a DVD, or a BD (select products only)
●
When running Disk Defragmenter
●
When performing a backup or recovery
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 power meter icon in taskbar 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.
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Chapter 6 Power management
ENWW
Summary of Contents for EliteBook 820 G4
Page 1: ...User Guide ...
Page 4: ...iv Safety warning notice ENWW ...
Page 6: ...vi Processor configuration setting select products only ENWW ...
Page 12: ...xii ENWW ...