1. Turn your Gateway CX200S laptop over.
2. Find the laptop battery release button lock for your Gateway CX200S laptop.
3. Now that your Gateway CX200S 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 CX200S battery is removed, grab your replacement Gateway CX200S battery for installation.
6. Insert the battery into the slot. Push the Gateway CX200S battery towards the laptop and secure it in place.