Hello everyone. I have a new iPhone 5 and today I noticed that my battery is draining faster than it should. My brother also has a new iPhone 5 and his battery is normal. Music almost doesnt effect it and standby too. Mine, after like 40 minutes of music after fully charging it, lost 12 percents of its power. After that, a hour-hour and a half standby lost another 11 percents of the power! From just music and standby the iPhone went from 100% to 78%. If you ask, with the same usage, my brother's iPhone lost only 5-6 percents. I find it unnerving and I wanna know what should I do? Does it mean that my all new expensive iPhone 5 has a problem? More info: Im on half or less of the brightness (so its not it).