1. Turn your Sony VGN-SR140EP laptop over.
2. Find the laptop battery release button lock for your Sony VGN-SR140EP laptop.
3. Now that your Sony VGN-SR140EP 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-SR140EP battery is removed, grab your replacement Sony VGN-SR140EP battery for installation.
6. Insert the battery into the slot. Push the Sony VGN-SR140EP battery towards the laptop and secure it in place.