1. Turn your Sony VGN-NS180E laptop over.
2. Find the laptop battery release button lock for your Sony VGN-NS180E laptop.
3. Now that your Sony VGN-NS180E 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-NS180E battery is removed, grab your replacement Sony VGN-NS180E battery for installation.
6. Insert the battery into the slot. Push the Sony VGN-NS180E battery towards the laptop and secure it in place.