1. Turn your Gateway NX510S laptop over.
2. Find the laptop battery release button lock for your Gateway NX510S laptop.
3. Now that your Gateway NX510S 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 Gateway NX510S battery is removed, grab your replacement Gateway NX510S battery for installation.
6. Insert the battery into the slot. Push the Gateway NX510S battery towards the laptop and secure it in place.