122 Mobile Computing
Monitoring main battery power
TECHNICAL NOTE: The computer drains the battery faster at low
temperatures. Check your remaining charge frequently if you are
working in temperatures below 50 degrees Fahrenheit.
The computer calculates the remaining battery charge based on your
current rate of power use and other factors such as the age of the
battery.
What to do when the main battery runs low
When the main battery runs low you can:
❖Plug the computer into an external power source and recharge
the main battery
❖Place the computer into Hibernation mode and replace the
main battery with a charged spare (not included with your
computer)
❖Save your work and turn off the computer
If you do not manage to do any of these things before the main
battery completely runs out of power, the computer automatically
enters Hibernation mode and turns itself off. Hibernation mode
keeps track of where you were, so that when you turn on the power
again, you can continue where you left off.
If you have Hibernation mode enabled (the default), the computer
copies the details of your open programs and files to the internal
storage drive before shutting down. For more information on using
Hibernation, see “Hibernation mode” on page 85.
Setting battery notifications
You can set two notifications. Each notification can be set to alert
you when a specified percentage of remaining battery power has
been reached. You can also set the computer to enter Sleep mode or
Hibernation mode or to completely power down when the
notification goes off.
To change the default notification settings:
1Click Start, Control Panel, System and Security, and then
Power Options.
The Power Options window appears.
2Click Change plan settings under the power plan to be
customized.
The Edit Plan Settings window appears.