1. Turn your Apple MA609CH/A laptop over.
2. Find the laptop battery release button lock for your Apple MA609CH/A laptop.
3. Now that your Apple MA609CH/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 MA609CH/A battery is removed, grab your replacement Apple MA609CH/A battery for installation.
6. Insert the battery into the slot. Push the Apple MA609CH/A battery towards the laptop and secure it in place.