1. Turn your Gateway NX200S laptop over.
2. Find the laptop battery release button lock for your Gateway NX200S laptop.
3. Now that your Gateway NX200S 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 NX200S battery is removed, grab your replacement Gateway NX200S battery for installation.
6. Insert the battery into the slot. Push the Gateway NX200S battery towards the laptop and secure it in place.