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