1. Turn your HP ZD7381EA laptop over.
2. Find the laptop battery release button lock for your HP ZD7381EA laptop.
3. Now that your HP ZD7381EA 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 ZD7381EA battery is removed, grab your replacement HP ZD7381EA battery for installation.
6. Insert the battery into the slot. Push the HP ZD7381EA battery towards the laptop and secure it in place.