HP EliteBook 2540p Notebook PC - Manual (Page 70)

2. Insert the battery into the battery bay (1) until it is seated.
The battery release latches (2) automatically lock the battery into place.
To remove the battery:
1. Turn the computer upside down on a flat surface, with the battery bay toward you.
2. Slide the left battery release latch (1) until it locks into place.
3. Slide the right battery release latch (2) to release the battery.
4. Remove the battery (3).
Charging a battery
WARNING! Do not charge the computer battery while you are onboard aircraft.
58 Chapter 5 Power management