1. Turn your Acer 243XI laptop over.
2. Find the laptop battery release button lock for your Acer 243XI laptop.
3. Now that your Acer 243XI 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 243XI battery is removed, grab your replacement Acer 243XI battery for installation.
6. Insert the battery into the slot. Push the Acer 243XI battery towards the laptop and secure it in place.