1. Turn your Sony VGN-TZ160NB laptop over.
2. Find the laptop battery release button lock for your Sony VGN-TZ160NB laptop.
3. Now that your Sony VGN-TZ160NB 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-TZ160NB battery is removed, grab your replacement Sony VGN-TZ160NB battery for installation.
6. Insert the battery into the slot. Push the Sony VGN-TZ160NB battery towards the laptop and secure it in place.