1. Turn your Sony VGN-CR320E laptop over.
2. Find the laptop battery release button lock for your Sony VGN-CR320E laptop.
3. Now that your Sony VGN-CR320E 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-CR320E battery is removed, grab your replacement Sony VGN-CR320E battery for installation.
6. Insert the battery into the slot. Push the Sony VGN-CR320E battery towards the laptop and secure it in place.