1. Turn your HP zt3240 laptop over.
2. Find the laptop battery release button lock for your HP zt3240 laptop.
3. Now that your HP zt3240 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 zt3240 battery is removed, grab your replacement HP zt3240 battery for installation.
6. Insert the battery into the slot. Push the HP zt3240 battery towards the laptop and secure it in place.