Toshiba M400 - Manual (Page 156)

6-12 User’s Manual
Power and Power-Up Modes
Maximizing battery operating time
A battery’s usefulness depends on how long it can supply power on a
single charge.
How long the charge lasts in a battery depends on:
■
CPU Processing speed
■
Screen brightness
■
System Sleep
■
System Hibernation
■
Monitor Power off
■
HDD Power off
■
How often and how long you use the hard disk, optical disc and the
floppy disk drive.
■
How much charge the battery contained to begin with.
■
How you use optional devices, such as a PC card, to which the battery
supplies power.
■
Enabling Sleep Mode conserves battery power if you are frequently
turning the computer off and on.
■
Where you store your programs and data.
■
Closing the LCD display panel when you are not using the keyboard
saves power.
■
Operating time decreases at low temperatures.
■
The condition of the battery terminals. Make sure the battery terminals
stay clean by wiping them with a clean dry cloth before installing the
battery pack.
Retaining data with power off
When you turn off your computer with fully charged batteries, the batteries
retain data for the following approximate time periods:
Retention time
Battery type State and Retention Time
Battery pack (4700mAh)
about 6 days (Sleep Mode)
about 70 days (Boot mode)
Slice Expansion Battery (4000mAh)
about 5 days (Sleep Mode)
about 60 days (Boot mode)
RTC battery
30 days