1. Turn your Sony VPC-EB4EFX laptop over.
2. Find the laptop battery release button lock for your Sony VPC-EB4EFX laptop.
3. Now that your Sony VPC-EB4EFX 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-EB4EFX battery is removed, grab your replacement Sony VPC-EB4EFX battery for installation.
6. Insert the battery into the slot. Push the Sony VPC-EB4EFX battery towards the laptop and secure it in place.