Charging a battery
WARNING! Do not charge the computer battery while on board an 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 might take longer if a battery is new, has been unused for two weeks or more, or is much
warmer or cooler than room temperature.
To prolong battery life and optimize the accuracy of battery charge displays:
●
If charging a new battery, charge it fully before turning on the computer.
●
Allow the battery to discharge below five 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.
Maximizing battery discharge time
Battery discharge time varies depending on the features used while on battery power. Maximum
discharge time gradually shortens, as the battery storage capacity naturally degrades.
To maximize 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.
50 Chapter 6 Power management
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