Apple M8840LL/A Setup Guide - Page 52

Replacing the Battery 1 Remove the battery from its holder, noting the orientation of the battery's positive and negative ends. 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 up and out of its holder. You may need to spread these two tabs slightly apart to release the battery. Spread the tabs gently so they don't break. 2 Insert the new lithium battery in the holder, making sure the battery's positive and negative symbols align with those on the holder. Warning Installing the battery incorrectly may cause an explosion. Use only the same type of battery or an equivalent battery recommended by the manufacturer of the original battery. 3 If you are finished installing items in your computer, skip ahead to "Closing the Computer." 52 Chapter 2