1. Turn your Sony VPC-CB290X laptop over.
2. Find the laptop battery release button lock for your Sony VPC-CB290X laptop.
3. Now that your Sony VPC-CB290X 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 VPC-CB290X battery is removed, grab your replacement Sony VPC-CB290X battery for installation.
6. Insert the battery into the slot. Push the Sony VPC-CB290X battery towards the laptop and secure it in place.