Apple MacBook (13-inch, Aluminum, Late 2008) - Manual (Page 70)

70 Chapter 5 Last, but Not Least
Battery Do not disassemble, drop, crush, or expose the battery to fire or temperatures
above 212° F (100° C). Stop using the battery if it appears damaged in any way. Replace
the battery only with an Apple-authorized battery for this product. Dispose of used
batteries promptly according to your local environmental guidelines.
Hearing damage 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 that may
sound normal but can be damaging to your hearing. If you experience ringing in your
ears or muffled speech, stop listening and have your hearing checked. The louder the
volume, the less time is required before your hearing could be affected. Hearing
experts suggest that to protect your hearing:
 Limit the amount of time you use earbuds or headphones at high volume.
 Avoid turning up the volume to block out noisy surroundings.
 Turn the volume down if you can’t hear people speaking near you.
High-risk activities This computer is not intended for use in the operation of nuclear
facilities, aircraft navigation or communications systems, air traffic control systems, or
for any other uses where the failure of the computer could lead to death, personal
injury, or severe environmental damage.