HP Pavilion dm4-1018tx Entertainment Notebook PC - Manual (Page 66)

3. Rotate the battery into the battery bay until it is seated (2). The battery release latch
automatically locks the battery into place (3).
To remove the battery:
1. Turn the computer upside down on a flat surface.
2. Slide the battery release latch (1) to release the battery.
NOTE: The battery release latch automatically returns to its original position.
3. Pivot the battery (2) upward and remove it from the computer (3).
56 Chapter 5 Power management