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Working Inside Your Computer 67
3 Replace the computer core in the enclosure. (See “Replacing the Computer Core in the
Enclosure” on page 68.)
Replacing the Battery
Your computer has a 3.6 V lithium battery. Some signs that you need to replace the battery
are intermittent problems starting up the computer and random changes in its date and time
settings. You can purchase a replacement battery from an Apple-authorized dealer.
1 Remove the battery from its holder, noting the orientation of the battery’s positive end. (Plus
and minus are also marked on the battery holder.)
2 Insert the new battery in the holder, making sure the battery’s positive and negative symbols
align with those on the holder.
3 Replace the computer core in the enclosure. (See “Replacing the Computer Core in the
Enclosure” on page 68.)
Important Batteries contain chemicals, some of which may be harmful to the environment.
Please dispose of used batteries according to your local environmental laws and guidelines.
Remove the battery by pulling it out
of its holder. If one is present, unsnap
the plastic band securing the battery
in place. Positive (
+
) and negative (-)
symbols are molded into the plastic
inside the holder. Be sure to orient the
battery correctly when you install it.
If you removed a plastic band, snap
it back into place.
Warning Installing the battery incorrectly may cause an explosion. Be sure the battery’s
positive and negative poles are correctly oriented in the holder. Use only the same type of
battery or an equivalent recommended by the manufacturer of the original.