1. Turn your HP ZD8234ea laptop over.
2. Find the laptop battery release button lock for your HP ZD8234ea laptop.
3. Now that your HP ZD8234ea 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 ZD8234ea battery is removed, grab your replacement HP ZD8234ea battery for installation.
6. Insert the battery into the slot. Push the HP ZD8234ea battery towards the laptop and secure it in place.