1. Turn your Apple G4 laptop over.
2. Find the laptop battery release button lock for your Apple G4 laptop.
3. Now that your Apple G4 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 G4 battery is removed, grab your replacement Apple G4 battery for installation.
6. Insert the battery into the slot. Push the Apple G4 battery towards the laptop and secure it in place.