1. Turn your Sony VPC-CW15FX laptop over.
2. Find the laptop battery release button lock for your Sony VPC-CW15FX laptop.
3. Now that your Sony VPC-CW15FX 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-CW15FX battery is removed, grab your replacement Sony VPC-CW15FX battery for installation.
6. Insert the battery into the slot. Push the Sony VPC-CW15FX battery towards the laptop and secure it in place.