1. Turn your Acer AO751 laptop over.
2. Find the laptop battery release button lock for your Acer AO751 laptop.
3. Now that your Acer AO751 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 AO751 battery is removed, grab your replacement Acer AO751 battery for installation.
6. Insert the battery into the slot. Push the Acer AO751 battery towards the laptop and secure it in place.