HP Notebook PC Reference Manual page 21

2. Insert the front (rounded) end of the battery into the battery compartment on the
bottom of the computer, and lower the back end in until it clicks into place.
To remove the battery
1. Before removing the battery, do one of the following:
• Shut down the computer or put it into Hibernate mode.
• Plug in the AC adapter.
2. Slide the battery's release latch, then lift the battery out of its compartment.
Getting Started with Your HP Notebook
Setting Up Your Computer
Reference Guide 21