I have a nvidia evga tablet. I noticed that it won't take the charge anymore, I charge it for about 4 hours and when I press on the power to turn it on. It gives me an empty battery logo and the screen won't turn on. When i plug it back to charge it, it indicates that it will take the charge. Again later i tried it again, does the same thing. Is there a problem with the charging port? or the battery? thanks guys.