1. Turn your Sony VGN-BX660P laptop over.
2. Find the laptop battery release button lock for your Sony VGN-BX660P laptop.
3. Now that your Sony VGN-BX660P 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-BX660P battery is removed, grab your replacement Sony VGN-BX660P battery for installation.
6. Insert the battery into the slot. Push the Sony VGN-BX660P battery towards the laptop and secure it in place.