1. Turn your Acer 4315-200512Mi laptop over.
2. Find the laptop battery release button lock for your Acer 4315-200512Mi laptop.
3. Now that your Acer 4315-200512Mi 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 4315-200512Mi battery is removed, grab your replacement Acer 4315-200512Mi battery for installation.
6. Insert the battery into the slot. Push the Acer 4315-200512Mi battery towards the laptop and secure it in place.