Optimizing Battery Operation - Texas Instruments TravelMate 4000M User Reference Manual

Optimizing Battery Operation

Your computer has three ways to save battery power:
The following table summarizes the power saving modes;
the sections following describe the modes in more detail.
Activate
Mode By
Cover Closing
Closed cover
Suspend
Standby Standby
Auto pointing
Suspend device &
keyboard
inactivity
Typical Operation
Hard disk on
Hard disk off
Max. usage, all functions on
5-2 Power-Saving Utilities
Manually turning off the
pressing STANDBY or setting up the computer to
enter auto-suspend mode
Saving power, in real time, while running your
applications, through user-selected power-saving levels
Specifying hardware and software configurations that
best match your applications and battery-savings
performance
Power Saving Modes Summary
Foreground/
Background
Resume Tasks
By Active?
Opening No
cover
Standby No
Activity Yes, after
wakeup
timeout for
duration of
inactivity
timeout
and hard disk by
LCD
Service Backlight
Interrupts On
No No
Yes No
Yes No,
except
after
wakeup
timeout
user-
specified
on/off
Opt imizing Bat tery Op eration
HDD/FDD Power
Accesses Used
Drives (watts)
No 2.0 - 4.2
No 2.0 - 5.0
Yes, has 2.5 - 6.0
independent
timer
6.0 - 12.0
5.0 - 11.0
20.5