1. Turn your Sony NSK-S6101 laptop over.
2. Find the laptop battery release button lock for your Sony NSK-S6101 laptop.
3. Now that your Sony NSK-S6101 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 NSK-S6101 battery is removed, grab your replacement Sony NSK-S6101 battery for installation.
6. Insert the battery into the slot. Push the Sony NSK-S6101 battery towards the laptop and secure it in place.