HP Compaq Presario C542EA Notebook PC - Manual (Page 34)

Inserting or removing the battery
CAUTION To prevent loss of information when removing a battery that is the sole power source,
initiate Hibernation or turn off the computer before removing the battery.
To insert the battery:
1. Turn the computer upside down on a flat surface, with the battery bay toward you.
2. Insert the battery into the battery bay (1) and rotate it downward until it is seated (2).
To remove the battery:
1. Turn the computer upside down on a flat surface, with the battery bay toward you.
2. Slide the battery release latch (1) to release the battery.
3. Pivot the battery (2) away from the computer and remove it (3).
28 Chapter 3 Power management ENWW