HP EliteBook 8440p - Manual (Page 79)

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 off.
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:
● Amber: The battery is charging.
● Turquoise: A battery is close to full charge capacity.
● Blinking amber: 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 begins blinking rapidly.
● Off: If the computer is plugged into an external power source, the light turns off when all batteries
in the computer are fully charged. If the computer is not plugged into an external power source,
the light stays off until the battery reaches a low battery level.
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
(Start > System and Security > Power Options). Preferences set using Power Options do not affect
lights.
Using battery power 67