HP EliteBook 840 G3 - Manual (Page 46)

Different power meter icons indicate whether the computer is running on battery or external power. The icon
also reveals a message if the battery has reached a low or critical battery level.
Setting password protection on wakeup
To set the computer to prompt for a password when the computer exits Sleep or Hibernation, follow these
steps:
1. Type power options in the taskbar search box, and then select Power Options.
‒ or –
Right-click the Power meter icon , and then select Power Options.
2. In the left pane, select Require a password on wakeup.
3. Select Change Settings that are currently unavailable.
4. Select Require a password (recommended).
NOTE: To create a user account password or change your current user account password, select Create
or change your user account password, and then follow the on-screen instructions. If you do not need
to create or change a user account password, go to step 5.
5. Select Save changes.
Using battery power
WARNING! To reduce potential safety issues, use only the battery provided with the computer, a
replacement battery provided by HP, or a compatible battery purchased from HP.
The computer runs on battery power whenever it is not plugged into external AC power. Computer battery life
varies, depending on power management settings, running programs, display brightness, external devices
connected to the computer, and other factors. Keeping the battery in the computer whenever the computer is
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 –
Click 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.
36 Chapter 6 Power management