Solid White Light... won't change

I have a Ring Video Doorbell with battery (not hardwired). My battery died (even though it showed 9% still on the app). Plugged it in to recharge and immediately went to a solid white light. I've reset it (held down the button for like 20 seconds). Once I release the button it goes right back to a solid light. Been plugged in for 30 minutes and the battery life still shows 9% --- it's stuck on that for some reason. Help!