Toshiba Portege 4000, User Manual

Page: 105 / 278

105
Power Management
Conserving power
Conserving power
How long a fully charged battery pack lasts when you are using
the computer depends on a number of factors, such as:
How the computer is configured.
How much you use the hard disk, DVD-ROM, CD-ROM,
and diskette drives.
Whether you use any optional devices to which the battery
supplies power.
Where you are working, since operating time decreases at low
temperatures.
There are various ways in which you can conserve power and
extend the operating time of your battery:
Enable Standby or Hibernation mode, which saves power
when you turn off the computer and turn it back on again.
Use Toshiba’s power-saving options.
These power-saving options control the way in which the
computer is configured. By using them, you can greatly increase
the length of time you can use the computer before you need to
recharge the battery.
Toshiba has combined these options into preset power usage
modes. Using one of these modes lets you choose between
maximum power savings and peak system performance. You may
also set individual power-saving options to suit your own needs.
The following sections describe how to choose a power usage
mode and discuss each power-saving option.