1. Turn your Sony VGN-N150G laptop over.
2. Find the laptop battery release button lock for your Sony VGN-N150G laptop.
3. Now that your Sony VGN-N150G 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-N150G battery is removed, grab your replacement Sony VGN-N150G battery for installation.
6. Insert the battery into the slot. Push the Sony VGN-N150G battery towards the laptop and secure it in place.