1. Turn your HP ZD7310ca laptop over.
2. Find the laptop battery release button lock for your HP ZD7310ca laptop.
3. Now that your HP ZD7310ca 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 ZD7310ca battery is removed, grab your replacement HP ZD7310ca battery for installation.
6. Insert the battery into the slot. Push the HP ZD7310ca battery towards the laptop and secure it in place.