1. Turn your Acer 2103WLC laptop over.
2. Find the laptop battery release button lock for your Acer 2103WLC laptop.
3. Now that your Acer 2103WLC 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 2103WLC battery is removed, grab your replacement Acer 2103WLC battery for installation.
6. Insert the battery into the slot. Push the Acer 2103WLC battery towards the laptop and secure it in place.