1. Turn your Asus N53NB laptop over.
2. Find the laptop battery release button lock for your Asus N53NB laptop.
3. Now that your Asus N53NB 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 N53NB battery is removed, grab your replacement Asus N53NB battery for installation.
6. Insert the battery into the slot. Push the Asus N53NB battery towards the laptop and secure it in place.