1. Turn your Toshiba NSK-TN0SV laptop over.
2. Find the laptop battery release button lock for your Toshiba NSK-TN0SV laptop.
3. Now that your Toshiba NSK-TN0SV 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 Toshiba NSK-TN0SV battery is removed, grab your replacement Toshiba NSK-TN0SV battery for installation.
6. Insert the battery into the slot. Push the Toshiba NSK-TN0SV battery towards the laptop and secure it in place.