plugged into AC power charges the battery and also protects your work in case of a power outage. If the
computer contains a charged battery and is running on external AC power, the computer automatically
switches to battery power if the AC adapter is disconnected on the computer or an AC power loss occurs.
NOTE:
When you disconnect AC power, the display brightness is automatically decreased to save battery
life. Select computer products can switch between graphic modes to increase battery life.
Finding additional battery information
To access battery information:
1.
Type
support
in the taskbar search box, and then select the HP Support Assistant app.
– or –
Select the question mark icon in the taskbar.
2.
Select My PC, select the Diagnostics and Tools tab, and then select HP Battery Check. If HP Battery
Check indicates that your battery should be replaced, contact support.
HP Support Assistant provides the following tools and information about the battery.
●
HP Battery Check tool to test battery performance
●
Information on calibration, power management, and proper care and storage to maximize battery life
●
Information on battery types, specifications, life cycles, and capacity
Using HP Battery Check
To monitor the status of your battery, or if the battery is no longer holding a charge, run HP Battery Check in
the HP Support Assistant app. If HP Battery Check indicates that your battery should be replaced, contact
support.
To run HP Battery Check:
1.
Connect the AC adapter to the computer.
NOTE:
The computer must be connected to external power for Battery Check to work properly.
2.
Type
support
in the taskbar search box, and then select the HP Support Assistant app.
– or –
Select the question mark icon in the taskbar.
3.
Select My PC, select the Diagnostics and Tools tab, and then select HP Battery Check. If HP Battery
Check indicates that your battery should be replaced, contact support.
Battery Check examines the battery and its cells to see if they are functioning properly, and then reports the
results of the examination.
Displaying the remaining battery charge
▲
Move the pointer over the Power meter icon
.
Maximizing battery discharge time
Battery discharge time varies depending on features you use while on battery power. Maximum discharge
time gradually decreases as the battery storage capacity naturally degrades.
36
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 ...