1. Turn your Sony VGN-AR270G laptop over.
2. Find the laptop battery release button lock for your Sony VGN-AR270G laptop.
3. Now that your Sony VGN-AR270G 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 Sony VGN-AR270G battery is removed, grab your replacement Sony VGN-AR270G battery for installation.
6. Insert the battery into the slot. Push the Sony VGN-AR270G battery towards the laptop and secure it in place.