1. Turn your Sony VPC-EH1FGX laptop over.
2. Find the laptop battery release button lock for your Sony VPC-EH1FGX laptop.
3. Now that your Sony VPC-EH1FGX 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-EH1FGX battery is removed, grab your replacement Sony VPC-EH1FGX battery for installation.
6. Insert the battery into the slot. Push the Sony VPC-EH1FGX battery towards the laptop and secure it in place.