Texas Instruments TravelMate 4000M - Optimizing Battery Operation

Optimizing Battery Operation
Your computer has three ways to save battery power:
❑ Manually turning off the LCD and hard disk by
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
The following table summarizes the power saving modes;
the sections following describe the modes in more detail.
Power Saving Modes Summary
Mode
Activate
By
Resume
By
Foreground/
Background
Tasks
Active?
Service
Interrupts
Backlight
On
HDD/FDD
Accesses
Drives
Power
Used
(watts)
Cover
Closed
Suspend
Closing
cover
Opening
cover
No No No No 2.0 - 4.2
Standby Standby Standby No Yes No No 2.0 - 5.0
Auto
Suspend
pointing
device &
keyboard
inactivity
Activity Yes, after
wakeup
timeout for
duration of
inactivity
timeout
Yes No,
except
after
wakeup
timeout
user-
specified
on/off
Yes, has
independent
timer
2.5 - 6.0
Typical Operation
Hard disk on 6.0 - 12.0
Hard disk off 5.0 - 11.0
Max. usage, all functions on 20.5
Optimizing Battery Operation
5-2 Power-Saving Utilities