1. Turn your Apple MB133/A laptop over.
2. Find the laptop battery release button lock for your Apple MB133/A laptop.
3. Now that your Apple MB133/A 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 MB133/A battery is removed, grab your replacement Apple MB133/A battery for installation.
6. Insert the battery into the slot. Push the Apple MB133/A battery towards the laptop and secure it in place.