I have had my 920 for about 8 days and when I download anything like a song, or get on the wpcentral app my phone drains at about 25%. It will drop15% in approximately 20 min. Is this something that many others have seen, and if so did it level out. This seems a bit to much battery drain. Other than described above my battery life is awesome,1.5 an hour. I have about a week to exchange it so anybody with some knowledge on this subject would be helpful. Thanks.