1. Turn your Sony VGN-CS190CE laptop over.
2. Find the laptop battery release button lock for your Sony VGN-CS190CE laptop.
3. Now that your Sony VGN-CS190CE 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-CS190CE battery is removed, grab your replacement Sony VGN-CS190CE battery for installation.
6. Insert the battery into the slot. Push the Sony VGN-CS190CE battery towards the laptop and secure it in place.