1. Turn your Sony VGNCR490EBR laptop over.
2. Find the laptop battery release button lock for your Sony VGNCR490EBR laptop.
3. Now that your Sony VGNCR490EBR 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 VGNCR490EBR battery is removed, grab your replacement Sony VGNCR490EBR battery for installation.
6. Insert the battery into the slot. Push the Sony VGNCR490EBR battery towards the laptop and secure it in place.