1. Turn your Sony 1-480-887-21 laptop over.
2. Find the laptop battery release button lock for your Sony 1-480-887-21 laptop.
3. Now that your Sony 1-480-887-21 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 Sony 1-480-887-21 battery is removed, grab your replacement Sony 1-480-887-21 battery for installation.
6. Insert the battery into the slot. Push the Sony 1-480-887-21 battery towards the laptop and secure it in place.