1. Turn your Acer MS2220 laptop over.
2. Find the laptop battery release button lock for your Acer MS2220 laptop.
3. Now that your Acer MS2220 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 MS2220 battery is removed, grab your replacement Acer MS2220 battery for installation.
6. Insert the battery into the slot. Push the Acer MS2220 battery towards the laptop and secure it in place.