1. Turn your HP NC6120 laptop over.
2. Find the laptop battery release button lock for your HP NC6120 laptop.
3. Now that your HP NC6120 laptop battery is unlocked, find the battery release button down.
4. Holding the laptop battery release button, gently pull your battery away from the laptop.
5. Now that your HP NC6120 battery is removed, grab your replacement HP NC6120 battery for installation.
6. Insert the battery into the slot. Push the HP NC6120 battery towards the laptop and secure it in place.