1. Turn your Sony VGN-FZ230EB laptop over.
2. Find the laptop battery release button lock for your Sony VGN-FZ230EB laptop.
3. Now that your Sony VGN-FZ230EB 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 VGN-FZ230EB battery is removed, grab your replacement Sony VGN-FZ230EB battery for installation.
6. Insert the battery into the slot. Push the Sony VGN-FZ230EB battery towards the laptop and secure it in place.