1. Turn your Acer AOP531h laptop over.
2. Find the laptop battery release button lock for your Acer AOP531h laptop.
3. Now that your Acer AOP531h 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 Acer AOP531h battery is removed, grab your replacement Acer AOP531h battery for installation.
6. Insert the battery into the slot. Push the Acer AOP531h battery towards the laptop and secure it in place.