1. Turn your Sony VGNCR490EBN laptop over.
2. Find the laptop battery release button lock for your Sony VGNCR490EBN laptop.
3. Now that your Sony VGNCR490EBN 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 VGNCR490EBN battery is removed, grab your replacement Sony VGNCR490EBN battery for installation.
6. Insert the battery into the slot. Push the Sony VGNCR490EBN battery towards the laptop and secure it in place.