1. Turn your MSI GX640-098US laptop over.
2. Find the laptop battery release button lock for your MSI GX640-098US laptop.
3. Now that your MSI GX640-098US 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 MSI GX640-098US battery is removed, grab your replacement MSI GX640-098US battery for installation.
6. Insert the battery into the slot. Push the MSI GX640-098US battery towards the laptop and secure it in place.