1. Turn your Sony VGN-CR490EBR laptop over.
2. Find the laptop battery release button lock for your Sony VGN-CR490EBR laptop.
3. Now that your Sony VGN-CR490EBR 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 VGN-CR490EBR battery is removed, grab your replacement Sony VGN-CR490EBR battery for installation.
6. Insert the battery into the slot. Push the Sony VGN-CR490EBR battery towards the laptop and secure it in place.