1. Turn your Asus F3Sg laptop over.
2. Find the laptop battery release button lock for your Asus F3Sg laptop.
3. Now that your Asus F3Sg 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 F3Sg battery is removed, grab your replacement Asus F3Sg battery for installation.
6. Insert the battery into the slot. Push the Asus F3Sg battery towards the laptop and secure it in place.