1. Turn your Sony VGN-SR290Y laptop over.
2. Find the laptop battery release button lock for your Sony VGN-SR290Y laptop.
3. Now that your Sony VGN-SR290Y 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-SR290Y battery is removed, grab your replacement Sony VGN-SR290Y battery for installation.
6. Insert the battery into the slot. Push the Sony VGN-SR290Y battery towards the laptop and secure it in place.