1. Turn your Acer 5920G-102G20Mn laptop over.
2. Find the laptop battery release button lock for your Acer 5920G-102G20Mn laptop.
3. Now that your Acer 5920G-102G20Mn 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 5920G-102G20Mn battery is removed, grab your replacement Acer 5920G-102G20Mn battery for installation.
6. Insert the battery into the slot. Push the Acer 5920G-102G20Mn battery towards the laptop and secure it in place.