1. Turn your Sony VGN-FW15G laptop over.
2. Find the laptop battery release button lock for your Sony VGN-FW15G laptop.
3. Now that your Sony VGN-FW15G 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-FW15G battery is removed, grab your replacement Sony VGN-FW15G battery for installation.
6. Insert the battery into the slot. Push the Sony VGN-FW15G battery towards the laptop and secure it in place.