1. Turn your Acer NAV70 laptop over.
2. Find the laptop battery release button lock for your Acer NAV70 laptop.
3. Now that your Acer NAV70 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 Acer NAV70 battery is removed, grab your replacement Acer NAV70 battery for installation.
6. Insert the battery into the slot. Push the Acer NAV70 battery towards the laptop and secure it in place.