1. Turn your HP HDX9000 laptop over.
2. Find the laptop battery release button lock for your HP HDX9000 laptop.
3. Now that your HP HDX9000 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 HDX9000 battery is removed, grab your replacement HP HDX9000 battery for installation.
6. Insert the battery into the slot. Push the HP HDX9000 battery towards the laptop and secure it in place.