1. Turn your Sony VPC-EA3CFX laptop over.
2. Find the laptop battery release button lock for your Sony VPC-EA3CFX laptop.
3. Now that your Sony VPC-EA3CFX 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-EA3CFX battery is removed, grab your replacement Sony VPC-EA3CFX battery for installation.
6. Insert the battery into the slot. Push the Sony VPC-EA3CFX battery towards the laptop and secure it in place.