HP Pavilion dv7-4278nr Entertainment Notebook PC - Manual (Page 53)

Resolving a low battery level when external power is available
To resolve a low battery level when external power is available, connect one of the following devices:
● AC adapter
● Optional expansion product or docking device
● Optional power adapter
Resolving a low battery level when a charged battery is available
To resolve a low battery level when a charged battery is available:
1. Shut down the computer or initiate Hibernation.
2. Remove the discharged battery, and then insert a charged battery.
3. Turn on the computer.
Resolving a low battery level when no power source is available
To resolve a low battery level when no power source is available, initiate Hibernation or save your work
and then shut down the computer.
Resolving a low battery level when the computer cannot exit Hibernation
To resolve a low battery level when the computer cannot exit Hibernation:
1. Insert a charged battery or connect the computer into external power.
2. Press the Power button to exit Hibernation.
Calibrating a battery
Calibrate the battery when:
● The battery charge displays seem inaccurate.
● You observe a significant change in battery run time.
A heavily used battery should only be calibrated once a month. Do not calibrate a new battery.
To calibrate the battery:
1. Fully charge the battery.
WARNING! Do not charge the computer battery while on board an aircraft.
NOTE: The battery charges while the computer is off or in use, but it charges faster when the
computer is off.
Using battery power 43