I had one that I had to return after only 3 weeks. It went dead and would not take a charge. Now the 2nd one I have is not charging completely and loses it's charge fast when taken off the charger. This happens whether I'm using the phone or not. On youtube I found a video that said to try cleaning the port. I'm in the process of trying to carefully do this. Actually it feels like the port may somehow have become loose. I think it has a few problems going on with the port as well as the battery.
