1. Turn your Sony 147963021 laptop over.
2. Find the laptop battery release button lock for your Sony 147963021 laptop.
3. Now that your Sony 147963021 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 147963021 battery is removed, grab your replacement Sony 147963021 battery for installation.
6. Insert the battery into the slot. Push the Sony 147963021 battery towards the laptop and secure it in place.