Apple Macintosh PowerBook 150 - Manual (Page 89)

3 Click the checkbox labeled “Allow processor cycling” to remove the X.
4 Close the PowerBook control panel.
To turn processor cycling back on, click the “Allow processor cycling”
checkbox again.
IMPORTANT To conserve battery power, turn processor cycling off only when
you are using programs that it interferes with. Turn processor cycling back on
again as soon as possible.
Processor speed
You can gain work time by slowing the computer’s microprocessor speed
(from 33 to 16 MHz). Although some programs may work more slowly, you
can gain up to 10 to 15 minutes of work time before you need to recharge the
battery. (The amount of time you gain depends on how you are using the
computer.)
To slow the processor speed, follow these steps:
1 Choose Control Panels from the Apple (
K
) menu, and open the PowerBook control
panel. (Or use the Power Settings module in the Control Strip to open the PowerBook
control panel.)
2 Slide the switch to Custom.
3 Click the checkbox labeled “Reduced processor speed” to select it.
4 Choose Restart from the Special menu.
The computer runs at a lower microprocessor speed until you click the
“Reduced processor speed” box again to remove the X and then restart the
computer.
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