Apple PowerBook (2400c) - Manual (Page 76)

IMPORTANT Lithium ion (LiIon) batteries contain metals that are hazardous
when released in the environment. It is inappropriate, and in some cases
unlawful, to throw batteries away with your household or business trash.
Many locations have government or Apple-sponsored collection or recycling
programs for spent batteries. Dispose of spent batteries in accordance with
the mandatory or voluntary battery collection programs in your location.
Contact your Apple-authorized service provider for information about the
recommended disposal procedures in your area.
Maximizing work time
Your Macintosh PowerBook’s battery can provide 2–4 hours of work time
before you need to recharge. The actual work time available depends on
which model of Macintosh PowerBook you have, what equipment you’re
using with your computer, and what steps you take to conserve power while
you work.
To save battery power, you can do the following:
m Minimize backlighting of the display.
m Turn off AppleTalk if your PowerBook is not connected to a network.
m Set the hard disk to spin down after a very short interval.
m Remove PC Cards when they are not in use.
m Take advantage of the sleep and wake features of your PowerBook
whenever your work is interrupted. You just need to close the display to
put the computer in sleep.
For more battery conservation tips, see the “Batteries & Power” topic area
of Mac OS Guide, available in the Guide (h) menu.
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