3 weeks ago I bought an iPhone 5S and I am worrying about my battery. I had a 4S before and its battery was draining so slow and was charging in 30 minutes and that's why I thought that there could be a problem with my new iPhone. Right now my battery usage is 3 h 30 min. and standby is 20 h and 16 min. It's 46%. I charged it 100% yesterday at 3 p.m. It fully charges in ~2 h. No location services activated, nothing. Now it is connected to Wi-Fi. I used it from time to time with my internet connection 3G on, I sent messages, I used apps such like Snapchat, Facebook, Instagram, I browsed the web, I called my mom twice... and I played a game but not for a long period of time (~10 min.). Oh, and I think it drains 1% / min. when I use apps, while when I'm listening music it drains 3% in ~30 min. and when I browse the web 1% / 2 min. but after I lock my phone. Is it normal?