1. Turn your HP zv5321EA laptop over.
2. Find the laptop battery release button lock for your HP zv5321EA laptop.
3. Now that your HP zv5321EA 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 zv5321EA battery is removed, grab your replacement HP zv5321EA battery for installation.
6. Insert the battery into the slot. Push the HP zv5321EA battery towards the laptop and secure it in place.