1. Turn your Sony VGN-NR280ES laptop over.
2. Find the laptop battery release button lock for your Sony VGN-NR280ES laptop.
3. Now that your Sony VGN-NR280ES 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-NR280ES battery is removed, grab your replacement Sony VGN-NR280ES battery for installation.
6. Insert the battery into the slot. Push the Sony VGN-NR280ES battery towards the laptop and secure it in place.