My battery is consistently draining in less than 16 hours and I am only using music with WIFI off... I really need a replacement battery but there seems to be no genius appointment at all until Sept. 5, and I am leaving for Japan for 4 months on Sept. 3. Should I just go to the Apple Store tomorrow and talk to them? I cannot leave the iPhone here... I need it with me for Japan. The alternative is using the Apple Store in Japan but I don't know enough Japanese to explain my problem.