Toshiba portege m400 Manual De Usuario

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:

about 6 days (Sleep Mode)
about 70 days (Boot mode)

about 5 days (Sleep Mode)
about 60 days (Boot mode)

30 days