1. Turn your Asus G51 laptop over.
2. Find the laptop battery release button lock for your Asus G51 laptop.
3. Now that your Asus G51 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 Asus G51 battery is removed, grab your replacement Asus G51 battery for installation.
6. Insert the battery into the slot. Push the Asus G51 battery towards the laptop and secure it in place.