1. Turn your Acer TM290XVi laptop over.
2. Find the laptop battery release button lock for your Acer TM290XVi laptop.
3. Now that your Acer TM290XVi 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 TM290XVi battery is removed, grab your replacement Acer TM290XVi battery for installation.
6. Insert the battery into the slot. Push the Acer TM290XVi battery towards the laptop and secure it in place.