HP dm4-1160us Charging a battery, Maximizing battery discharge time, Managing low battery levels

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Charging a battery

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

The battery charges whenever the computer is plugged into external power through an AC adapter, an optional power adapter, an optional expansion product, or an optional docking device.

The battery charges whether the computer is off or in use, but it charges faster when the computer is off.

Charging may take longer if a battery is new, has been unused for 2 weeks or more, or is much warmer or cooler than room temperature.

To prolong battery life and optimize the accuracy of battery charge displays, follow these recommendations:

●If you are charging a new battery, charge it fully before turning on the computer.

●Charge the battery until the battery light turns white.

NOTE: If the computer is on while the battery is charging, the battery meter in the notification area may show 100 percent charge before the battery is fully charged.

●Allow the battery to discharge below 5 percent of a full charge through normal use before charging it.

●If the battery has been unused for one month or more, calibrate the battery instead of simply charging it.

The battery light displays charge status:

●White: The computer is connected to external power and the battery is fully charged.

●Amber: The computer is connected to external power and the battery is charging.

●Blinking: A battery that is the only available power source has reached a low battery level. When the battery reaches a critical battery level, the battery light continues to blink.

Maximizing battery discharge time

Battery discharge time varies depending on the features you use while on battery power. Maximum discharge time gradually shortens, as the battery storage capacity naturally degrades.

Tips for maximizing battery discharge time:

●Lower the brightness on the display.

●Check the Power saver setting in Power Options.

●Remove the battery from the computer when it is not being used or charged.

●Store the battery in a cool, dry location.

Managing low battery levels

The information in this section describes the alerts and system responses set at the factory. Some low-battery alerts and system responses can be changed using Power Options in Windows Control Panel. Preferences set using Power Options do not affect lights.

Using battery power 57

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Contents HP Pavilion Notebook PC Product notice Safety warning notice Iv Safety warning notice Table of contents Pointing devices and keyboard Power management Drives Disabling and enabling QuickWeb 104 TouchPad FeaturesIdentifying the hardware Top componentsLights Component Description Power light White Power is onPanel System and Security Power Options Power button and fingerprint readerFn key KeysRight-side components Front componentsLeft-side components Display components Bottom components Wireless antennasComponent Description Additional hardware components LabelsComponent Description Icon Name Description Using wireless devicesIdentifying wireless and network status icons NetworkingUsing the wireless action key Using the wireless controlsUsing HP Wireless Assistant software Using operating system controls Using a WlanProtecting your Wlan Setting up a WlanConnecting to a Wlan Roaming to another network Using HP Mobile Broadband select models onlyInserting a SIM Removing a SIM Bluetooth and Internet Connection Sharing ICS Using Bluetooth wireless devicesCannot connect to a Wlan Troubleshooting wireless connection problemsCannot connect to a preferred Wlan network Current Wlan network security codes are unavailable Network icon is not displayedCannot connect to the wireless router Connecting to a local area network LANWlan connection is very weak Page Pointing devices and keyboard Using pointing devicesSetting pointing device preferences Using the TouchPadSelecting Scrolling Using TouchPad gesturesConnecting an external mouse Using the action keysIcon Action Description Using the hotkeys Icon Function Hotkey Description Cleaning the TouchPad and keyboardPointing devices and keyboard Multimedia Multimedia featuresIdentifying your multimedia components Multimedia Using the media activity action keys Using the media activity functionsMultimedia software Using HP MediaSmart software Opening preinstalled multimedia softwareUsing other multimedia software Checking your audio functions Installing multimedia software from a discConnecting external audio devices AudioVideo Using the audio-out headphone jackUsing the audio-in microphone jack Using the external monitor portConnecting an Hdmi device Configuring audio for Hdmi select models only Identifying the installed optical driveOptical drive LightScribe CD or Using optical discs CDs, DVDs, and BDsSelecting the right disc CDs, DVDs, and BDs CD-R discsPlaying a CD, DVD, or BD Changing DVD region settings Configuring AutoPlayCopying a CD or DVD Observing the copyright warningCreating burning a CD, DVD, or BD Removing an optical disc CD, DVD, or BD Computer does not detect the optical drive TroubleshootingDisc does not play Preventing playback disruptionsMovie stops, skips, or plays erratically Disc does not play automaticallyMovie is not visible on an external display Device driver must be reinstalledObtaining the latest HP device drivers WebcamAdjusting webcam properties Initiating and exiting Sleep Power managementSetting power options Using power-saving statesInitiating and exiting Hibernation Using the battery meterUsing power plans Viewing the current power planCustomizing power plans Using external AC powerSetting password protection on wakeup Selecting a different power planConnecting the AC adapter Testing an AC adapter Using battery powerIdentifying batteries Inserting or removing the battery Finding battery information in Help and SupportUsing Battery Check Displaying the remaining battery chargePage Maximizing battery discharge time Charging a batteryManaging low battery levels Identifying low battery levels Calibrating a batteryResolving a low battery level Disable Hibernation and Sleep Fully charge the batteryFully recharge the battery Discharge the batteryReenable Hibernation and Sleep Disposing of a used battery Switching between graphics modes select models onlyConserving battery power Storing a batteryClick Shut down Shutting down the computerDrives Identifying installed drivesHandling drives Improving hard drive performance Using HP ProtectSmart Hard Drive ProtectionUsing Disk Defragmenter Using Disk CleanupIdentifying HP ProtectSmart Hard Drive Protection status Using HP ProtectSmart Hard Drive Protection softwareReplacing the hard drive Page Page Page Page Removing a USB device Using a USB deviceConnecting a USB device External devicesConnecting an eSATA device Using an eSATA deviceRemoving an eSATA device Page External media cards Using Digital Media Slot cardsInserting a digital card Removing a digital card Adding or replacing memory modules Memory modulesPage Page Upgrading a memory module in the primary memory module slot Page Page Page Protecting the computer Using passwordsComputer risk Security feature SecuritySetting passwords in Setup Utility Setting passwords in WindowsPassword Function Managing an administrator password Administrator passwordPower-on password Using antivirus softwareInstalling critical security updates Using firewall softwareInstalling an optional security cable Locating the fingerprint reader Using the fingerprint readerRegistering fingerprints Using your registered fingerprint to log on to Windows Disabling and enabling QuickWeb HP QuickWebChanging the language of Setup Utility Setup UtilityStarting Setup Utility Using Setup UtilityRestoring default settings in Setup Utility Navigating and selecting in Setup UtilityDisplaying system information Main menu Setup Utility menusExiting Setup Utility System Configuration menuPrimary Hard Disk Self Test Diagnostics menuUpdating the Bios Software updatesDetermining the Bios version Updating programs and drivers Downloading a Bios updatePage Creating recovery discs Backup and RecoveryBacking up your information Create a system restore point Using Windows Backup and RestoreUsing system restore points When to create restore pointsRecovering from the recovery discs Performing a recoveryRestore to a previous date and time Click System Recovery in the Recovery Manager window Index Symbols/NumericsDVD-ROM SIM SSD