My v20 is new and suddenly I got bad drainage. It dies on 100%. I will let it charge all the way to 100 then take it off. Within about a minute of it being off the charger, it dies. As soon as I plug it back up and turn it on it says fully charged and to remove the charger. It is still around 96-100% percent. I did a factory reset, disabled all apps I don't use, downloaded minimum apps that I know worked fine, data saver, battery saver, and the battery stats are all normal. I don't use it all at all until it's at 100%. I don't know what to do, I factory reset twice. It will still die even if I only have the screen on for more than a minute.