1. Turn your Sony VGN-FJ180PL laptop over.
2. Find the laptop battery release button lock for your Sony VGN-FJ180PL laptop.
3. Now that your Sony VGN-FJ180PL 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-FJ180PL battery is removed, grab your replacement Sony VGN-FJ180PL battery for installation.
6. Insert the battery into the slot. Push the Sony VGN-FJ180PL battery towards the laptop and secure it in place.