1. Turn your Sony VGN-N250EW laptop over.
2. Find the laptop battery release button lock for your Sony VGN-N250EW laptop.
3. Now that your Sony VGN-N250EW 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-N250EW battery is removed, grab your replacement Sony VGN-N250EW battery for installation.
6. Insert the battery into the slot. Push the Sony VGN-N250EW battery towards the laptop and secure it in place.