1. Turn your Asus A8Jn laptop over.
2. Find the laptop battery release button lock for your Asus A8Jn laptop.
3. Now that your Asus A8Jn 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 A8Jn battery is removed, grab your replacement Asus A8Jn battery for installation.
6. Insert the battery into the slot. Push the Asus A8Jn battery towards the laptop and secure it in place.