Apple MacBook (13-inch, Late 2009) - Manual (Page 68)

68 Chapter 5 Last, but Not Least
For your safety and that of your equipment, follow these rules for handling and
cleaning your MacBook and for working more comfortably. Keep these instructions
handy for reference by you and others.
Important Safety Information
Built-in battery Do not remove the battery from your MacBook. The battery should be
replaced only by an Apple Authorized Service Provider. Discontinue use of your
MacBook if it is dropped or appears crushed, bent, deformed, or damaged. Do not
expose the computer to temperatures above 212° F or 100° C.
Proper handling Set up your MacBook on a stable work surface that allows for
adequate air circulation under and around the computer. Do not operate your
MacBook on a pillow or other soft material, as the material can block the airflow vents.
Never place anything over the keyboard when operating your MacBook. Never push
objects into the ventilation openings.
The bottom of your MacBook may become very warm during normal use. If your
MacBook is on your lap and gets uncomfortably warm, move it to a stable work
surface.
WARNING: Incorrect storage or use of your computer may void the manufacturer’s
warranty.
WARNING: Failure to follow these safety instructions could result in fire, electric
shock, or other injury or damage.