1. Turn your Acer 520TE laptop over.
2. Find the laptop battery release button lock for your Acer 520TE laptop.
3. Now that your Acer 520TE 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 520TE battery is removed, grab your replacement Acer 520TE battery for installation.
6. Insert the battery into the slot. Push the Acer 520TE battery towards the laptop and secure it in place.