Apple PowerBook G4 (15-inch, 1.67/1.5 GHz) - Manual (Page 77)

76 Appendix B Safety, Use, and Care Information
Battery
Avoid Hearing Damage
Apple and the Environment
Apple Computer, Inc., recognizes its responsibility to minimize the environmental
impacts of its operations and products.
For More Information
Go to www.apple.com/environment/summary.html.
Ergonomics
Here are some tips for setting up a healthy work environment.
Keyboard and Trackpad
When you use the keyboard and trackpad, your shoulders should be relaxed. Your
upper arm and forearm should form an angle that is slightly greater than a right angle,
with your wrist and hand in roughly a straight line.
Warning: There is risk of explosion if the battery is replaced by an incorrect battery
type. Dispose of used batteries according to your local environmental guidelines.
Don’t puncture or incinerate the battery.
Warning: Permanent hearing loss may occur if earbuds or headphones are used at
high volume. You can adapt over time to a higher volume of sound, which may sound
normal but can be damaging to your hearing. Set your PowerBook volume to a safe
level before that happens. If you experience ringing in your ears, reduce the volume
or discontinue use of earbuds or headphones with your PowerBook.
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