Dell Inspiron 2000 - Manual (Page 57)

Experimenting With Power Conservation
In general, the lower the value you set for each time-out option, the longer your battery's charge lasts. On the other hand, setting high time-out values tends to optimize the
computer's performance. For best results, experiment as follows:
l Use the computer with all the options set at their default values.
l Use the computer with all the time-out options disabled or set to Off.
l Use the computer with all the time-out options set to their minimum values.
Evaluate the way that the different time-out settings affect how long you can operate the computer on battery power versus the relative efficiency of how your software
performs.