We are going to teach you how to remove and replace the battery.
Flip the computer so that the bottom is facing up.
Look to the long edge where the computer screen is hinged and find the "release slide". It is located at the top left corner of the square indent.
Use your finger to slide the release to the left.
While holding the release slide with one hand, use your opposite hand to pull the battery from its slot by gently shaking the battery left and right to help slide it out.