1. Turn your Sony VGN-TX770P laptop over.
2. Find the laptop battery release button lock for your Sony VGN-TX770P laptop.
3. Now that your Sony VGN-TX770P 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-TX770P battery is removed, grab your replacement Sony VGN-TX770P battery for installation.
6. Insert the battery into the slot. Push the Sony VGN-TX770P battery towards the laptop and secure it in place.