I loved the way this extended battery would keep my V20 charged for a whole week, but it made the phone too heavy for my poor, old arthritic hands. So I put the original battery back in the phone and this one is up for sale. It is used but works perfectly well. You may not get a full week's charge from it like I did because I don't use my phone that much.But it will certainly be longer than the original battery charge. As you can see from the photo, it will make the phone 3/4" wide, so if you use a case or pouch for your LG V20, it may no longer fit. The back is included.