Apple Macintosh PowerBook 1400 - Manual (Page 83)

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Elsewhere 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 typically provides 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.
Models with a CD-ROM drive are likely to get less total work time from the
battery than models without that drive.
Note: The CD-ROM drive consumes slightly less power if a compact disc is
in the drive when the drive is not in use. This is because the computer
continually checks the empty drive, which uses a small amount of power.
For battery conservation tips, see the “Batteries & Power” topic of Mac OS
Guide, available in the Guide (h) menu.
83 Power Management