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Resolving a low battery level, Conserving battery power, Using external ac power – HP EliteBook 840 G3 User Manual

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Resolving a low battery level

Resolving a low battery level when external power is available

Connect one of the following devices:

AC adapter

Optional docking or expansion device

Optional power adapter purchased as an accessory from HP

Resolving a low battery level when no power source is available

To resolve a low battery level when no power source is available, save your work and shut down the

computer.

Conserving battery power

From the Start screen, type power, select Settings, and then select Power Options.

Select low power-use settings through Power Options.

Turn off wireless and LAN connections and exit modem applications when you are not using them.

Disconnect unused external devices that are not plugged into an external power source.

Stop, disable, or remove any external memory cards that you are not using.

Decrease screen brightness.

Before you leave your work, initiate Sleep, or shut down the computer.

Using external AC power

WARNING!

Do not charge the computer battery while you are onboard aircraft.

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 models 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 the notification area changes appearance.

Setting power options

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